Develop Reference

Unfortunately, Todo has stopped [closed]

Closed. This question needs debugging details. It is not currently accepting answers.
Edit the question to include desired behavior, a specific problem or error, and the shortest code necessary to reproduce the problem. This will help others answer the question.
Closed 7 years ago.
Improve this question
Can someone please assist me, no mater what i do i can't get around this problem of the app not working. I am using Android studio.
My Logcat
10-23 07:29:21.312 31399-31399/org.jaco.todo D/dalvikvm﹕ Late-enabling CheckJNI
10-23 07:29:21.512 31399-31402/org.jaco.todo D/dalvikvm﹕ GC_CONCURRENT freed 82K, 2% free 11049K/11271K, paused 11ms+0ms, total 16ms
10-23 07:29:21.532 31399-31399/org.jaco.todo D/AndroidRuntime﹕ Shutting down VM
10-23 07:29:21.536 31399-31399/org.jaco.todo W/dalvikvm﹕ threadid=1: thread exiting with uncaught exception (group=0xa62d9288)
10-23 07:29:21.540 31399-31399/org.jaco.todo E/AndroidRuntime﹕ FATAL EXCEPTION: main
java.lang.RuntimeException: Unable to start activity ComponentInfo{org.jaco.todo/org.jaco.todo.TodoActivity}: java.lang.IllegalStateException: To use this functionality, add this to your AndroidManifest.xml:
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2059)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2084)
at android.app.ActivityThread.access$600(ActivityThread.java:130)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1195)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:137)
at android.app.ActivityThread.main(ActivityThread.java:4745)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:511)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
at dalvik.system.NativeStart.main(Native Method)
Caused by: java.lang.IllegalStateException: To use this functionality, add this to your AndroidManifest.xml:
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
at com.parse.Parse.requirePermission(Parse.java:495)
at com.parse.ParseCommandCache.runEventuallyAsync(ParseCommandCache.java:250)
at com.parse.ParseAnalytics.trackAppOpened(ParseAnalytics.java:61)
at com.parse.ParseAnalytics.trackAppOpened(ParseAnalytics.java:32)
at org.jaco.todo.TodoActivity.onCreate(TodoActivity.java:41)
at android.app.Activity.performCreate(Activity.java:5008)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1079)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2023)
... 11 more
10-23 07:29:58.452 31399-31399/? I/Process﹕ Sending signal. PID: 31399 SIG: 9
My TodoActivity.java
public class TodoActivity extends Activity implements OnItemClickListener {
private EditText mTaskInput;
private ListView mListView;
private TaskAdapter mAdapter;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_todo);
Parse.initialize(this, "9YsgDgjMOqulfH9JYXVWZG5a6EBVf1SbMyz7gXH4", "CZ60kHo0V9cG190DAoIhB781BL3mRfdy6FSSPy6D");
ParseAnalytics.trackAppOpened(getIntent());
ParseObject.registerSubclass(Task.class);
ParseUser currentUser = ParseUser.getCurrentUser();
if(currentUser == null){
Intent intent = new Intent(this, LoginActivity.class);
startActivity(intent);
finish();
}
mAdapter = new TaskAdapter(this, new ArrayList<Task>());
mTaskInput = (EditText) findViewById(R.id.task_input);
mListView = (ListView) findViewById(R.id.task_list);
mListView.setAdapter(mAdapter);
mListView.setOnItemClickListener(this);
updateData();
}
public void updateData(){
ParseQuery<Task> query = ParseQuery.getQuery(Task.class);
query.whereEqualTo("user", ParseUser.getCurrentUser());
query.setCachePolicy(CachePolicy.CACHE_THEN_NETWORK);
query.findInBackground(new FindCallback<Task>() {
#Override
public void done(List<Task> tasks, ParseException error) {
if(tasks != null){
mAdapter.clear();
for (int i = 0; i < tasks.size(); i++) {
mAdapter.add(tasks.get(i));
}
}
}
});
}
public void createTask(View v) {
if (mTaskInput.getText().length() > 0){
Task t = new Task();
t.setACL(new ParseACL(ParseUser.getCurrentUser()));
t.setUser(ParseUser.getCurrentUser());
t.setDescription(mTaskInput.getText().toString());
t.setCompleted(false);
t.saveEventually();
mAdapter.insert(t, 0);
mTaskInput.setText("");
}
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.todo, menu);
return true;
}
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case R.id.sign_in:
ParseUser.logOut();
Intent intent = new Intent(this, LoginActivity.class);
startActivity(intent);
finish();
return true;
}
return false;
}
#Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
Task task = mAdapter.getItem(position);
TextView taskDescription = (TextView) view.findViewById(R.id.task_description);
task.setCompleted(!task.isCompleted());
if(task.isCompleted()){
taskDescription.setPaintFlags(taskDescription.getPaintFlags() | Paint.STRIKE_THRU_TEXT_FLAG);
}else{
taskDescription.setPaintFlags(taskDescription.getPaintFlags() & (~Paint.STRIKE_THRU_TEXT_FLAG));
}
task.saveEventually();
}
}
my activity_todo.xml
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:paddingLeft="#dimen/activity_horizontal_margin"
android:paddingRight="#dimen/activity_horizontal_margin"
tools:context=".TodoActivity" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal" >
<EditText
android:id="#+id/task_input"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:ems="10"
android:inputType="text"
android:hint="input_hint">
<requestFocus />
</EditText>
<Button
android:id="#+id/submit_button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:onClick="createTask"
android:text="submit_button" />
</LinearLayout>
<ListView
android:id="#+id/task_list"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
</LinearLayout>
My AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="org.jaco.todo" >
<application
android:allowBackup="true"
android:icon="#mipmap/ic_launcher"
android:label="#string/app_name"
android:theme="#style/AppTheme" >
<activity
android:name=".TodoActivity"
android:label="#string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
Any ideas?

Add your TodoActivity class with package name in your Manifest File and also add next permissions:
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>

Android Facebook Login - Error caused by null

I am trying to add a facebook login to my app. Unfortunatly I am getting an error. I defined the app id in my strings.xml and add meta-data to my manifest. Although I added the facebook activity and the permission to use the Internet but the error is still there. I am of the opionen that there is a problem with the layout but I don't see one. Maybe you could help me.
EDIT: I changed the position of the initialization and the content view function but now I am getting a new error. I looked it up and found out that it is normally a problem with the app id but I have implemented the id using meta data in my manifest.
The error is the following:
10-07 10:06:36.249 4682-4748/de.homeproducts.ineedhelp E/AndroidRuntime﹕ FATAL EXCEPTION: AsyncTask #2
Process: de.homeproducts.ineedhelp, PID: 4682
java.lang.RuntimeException: An error occured while executing doInBackground()
at android.os.AsyncTask$3.done(AsyncTask.java:304)
at java.util.concurrent.FutureTask.finishCompletion(FutureTask.java:355)
at java.util.concurrent.FutureTask.setException(FutureTask.java:222)
at java.util.concurrent.FutureTask.run(FutureTask.java:242)
at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:231)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
at java.lang.Thread.run(Thread.java:818)
Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'int java.lang.Object.hashCode()' on a null object reference
at java.util.concurrent.ConcurrentHashMap.get(ConcurrentHashMap.java:746)
at java.util.concurrent.ConcurrentHashMap.containsKey(ConcurrentHashMap.java:774)
at com.facebook.internal.Utility.queryAppSettings(Utility.java:802)
at com.facebook.login.widget.LoginButton$1.doInBackground(LoginButton.java:502)
at com.facebook.login.widget.LoginButton$1.doInBackground(LoginButton.java:499)
at android.os.AsyncTask$2.call(AsyncTask.java:292)
at java.util.concurrent.FutureTask.run(FutureTask.java:237)
            at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:231)
            at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
            at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
            at java.lang.Thread.run(Thread.java:818)
This is my Activity class:
public ImageView view = null;
public LoginButton loginButton = null;
public CallbackManager callbackManager = null;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
FacebookSdk.sdkInitialize(this.getApplicationContext());
callbackManager = CallbackManager.Factory.create();
loginButton = (LoginButton) this.findViewById(R.id.login_button);
loginButton.registerCallback(callbackManager, new FacebookCallback<LoginResult>() {
#Override
public void onSuccess(LoginResult loginResult) {
Toast toast = Toast.makeText(getApplicationContext(), "Login erfolgreich!", Toast.LENGTH_LONG);
}
#Override
public void onCancel() {
Toast toast = Toast.makeText(getApplicationContext(), "Login abgebrochen!", Toast.LENGTH_LONG);
}
#Override
public void onError(FacebookException e) {
Toast toast = Toast.makeText(getApplicationContext(), "Login fehlgeschlagen!", Toast.LENGTH_LONG);
}
});
And this is my XML file:
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent"
android:layout_height="match_parent" android:paddingLeft="#dimen/activity_horizontal_margin"
android:paddingRight="#dimen/activity_horizontal_margin"
android:paddingTop="#dimen/activity_vertical_margin"
android:paddingBottom="#dimen/activity_vertical_margin" tools:context=".MainActivity">
<ImageView android:id="#+id/hello_world" android:src="#drawable/icon" android:layout_width="128dp"
android:layout_height="128dp" android:layout_centerHorizontal="true"/>
<com.facebook.login.widget.LoginButton
android:id="#+id/login_button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerInParent="true"
/>
</RelativeLayout>
The manifest looks like this:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="de.homeproducts.ineedhelp" >
<uses-permission android:name="android.permission.INTERNET"/>
<application
android:allowBackup="true"
android:icon="#mipmap/ic_launcher"
android:label="#string/app_name"
android:theme="#style/AppTheme" >
<activity
android:name=".MainActivity"
android:label="#string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity android:name="com.facebook.FacebookActivity"
android:configChanges=
"keyboard|keyboardHidden|screenLayout|screenSize|orientation"
android:theme="#android:style/Theme.Translucent.NoTitleBar"
android:label="#string/app_name" />
</application>
<meta-data android:name="com.facebook.sdk.ApplicationId" android:value="#string/app_id"/>
</manifest>

You have to write :
FacebookSdk.sdkInitialize(this.getApplicationContext());
Before:
setContentView(R.layout.activity_main);
See Facebook Sdk Has Not Been Initilized

Android Hello World Tutorial stops when tested

I am up to the "Start Another Activity" section of the Android tutorial and it simply won't work when I install and test it.
It compiles fine but running it breaks after I click the send button.
I am using the command line tools on Ubuntu 12.04 and installing to a real device, my Galaxy S5.
I am aware of logcat but haven't been able to get it working, it either shows no output at all, or gives a massive spam of output I can't keep up with. I would happily provide logcat information if I could manage to isolate my app's output and cut through everything else.
I have seen a lot of similar questions on this which leads me to believe the tutorial isn't very well written.
Here is "MyActivity.java"
package com.example.myfirstapp;
import android.app.Activity;
import android.os.Bundle;
import android.content.Intent;
import android.widget.EditText;
import android.view.View;
public class MyActivity extends Activity
{
public final static String EXTRA_MESSAGE = "com.mycompany.myfirstapp.MESSAGE";
/** Called when the activity is first created */
#Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
}
/** Called when the user clicks the send button */
public void sendMessage(View view)
{
Intent intent = new Intent(this, DisplayMessageActivity.class);
EditText editText = (EditText) findViewById(R.id.edit_message);
String message = editText.getText().toString();
intent.putExtra(EXTRA_MESSAGE, message);
startActivity(intent);
}
}
Here is DisplayMessageActivity
package com.example.myfirstapp;
import android.app.Activity;
import android.os.Bundle;
import android.content.Intent;
import android.support.v7.app.*;
import android.view.*;
import android.widget.*;
import com.example.myfirstapp.R;
public class DisplayMessageActivity extends ActionBarActivity
{
#Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
//Get the message from intent
Intent intent = getIntent();
String message = intent.getStringExtra(MyActivity.EXTRA_MESSAGE);
//Create the text view
TextView textView = new TextView(this);
textView.setTextSize(40);
textView.setText(message);
//Set the text view as the activity layout
setContentView(textView);
}
}
Here is AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.myfirstapp"
android:versionCode="1"
android:versionName="1.0">
<application android:label="#string/app_name" android:icon="#drawable/ic_launcher">
<activity
android:name="MyActivity"
android:label="#string/app_name">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name="com.example.myfirstapp.DisplayMessageActivity"
android:label="#string/title_activity_display_message"
android:parentActivityName="com.example.myfirstapp.MyActivity">
<meta-data
android:name="android.support.PARENT_ACTIVITY"
android:value="com.example.myfirstapp.MyActivity"
/>
</activity>
</application>
</manifest>
EDIT: Here is Main.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="horizontal"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
<EditText android:id="#+id/edit_message"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:hint="#string/edit_message"
/>
<Button
android:layout_weight="1"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:text="#string/button_send"
android:onClick="sendMessage"
/>
</LinearLayout>
There was some code that I changed and took out as it said to add code in, but then would later show a "this is what your code should look like" and it was missing some of the original code. I also changed the manifest package names in the activities because at the beginning it uses com.example.myfirstapp but later uses com.mycompany.myfirstapp
Any help or advice on why this seemingly simple tutorial doesn't work is greatly appreciated.
EDIT:
Logcat output - (after pressing the send button)
I/Timeline( 3812): Timeline: Activity_launch_request id:com.example.myfirstapp time:74636924
D/AndroidRuntime( 3812): Shutting down VM
E/AndroidRuntime( 3812): FATAL EXCEPTION: main
E/AndroidRuntime( 3812): Process: com.example.myfirstapp, PID: 3812
E/AndroidRuntime( 3812): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.myfirstapp/com.example.myfirstapp.DisplayMessageActivity}: java.lang.IllegalStateException: You need to use a Theme.AppCompat theme (or descendant) with this activity.
E/AndroidRuntime( 3812): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2658)
E/AndroidRuntime( 3812): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2725)
E/AndroidRuntime( 3812): at android.app.ActivityThread.access$900(ActivityThread.java:172)
E/AndroidRuntime( 3812): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1422)
E/AndroidRuntime( 3812): at android.os.Handler.dispatchMessage(Handler.java:102)
E/AndroidRuntime( 3812): at android.os.Looper.loop(Looper.java:145)
E/AndroidRuntime( 3812): at android.app.ActivityThread.main(ActivityThread.java:5834)
E/AndroidRuntime( 3812): at java.lang.reflect.Method.invoke(Native Method)
E/AndroidRuntime( 3812): at java.lang.reflect.Method.invoke(Method.java:372)
E/AndroidRuntime( 3812): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1388)
E/AndroidRuntime( 3812): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1183)
E/AndroidRuntime( 3812): Caused by: java.lang.IllegalStateException: You need to use a Theme.AppCompat theme (or descendant) with this activity.
E/AndroidRuntime( 3812): at android.support.v7.app.ActionBarActivityDelegate.onCreate(ActionBarActivityDelegate.java:151)
E/AndroidRuntime( 3812): at android.support.v7.app.ActionBarActivityDelegateBase.onCreate(ActionBarActivityDelegateBase.java:138)
E/AndroidRuntime( 3812): at android.support.v7.app.ActionBarActivity.onCreate(ActionBarActivity.java:123)
E/AndroidRuntime( 3812): at com.example.myfirstapp.DisplayMessageActivity.onCreate(DisplayMessageActivity.java:16)
E/AndroidRuntime( 3812): at android.app.Activity.performCreate(Activity.java:6221)
E/AndroidRuntime( 3812): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1119)
E/AndroidRuntime( 3812): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2611)
E/AndroidRuntime( 3812): ... 10 more
I/Process ( 3812): Sending signal. PID: 3812 SIG: 9
I/ActivityManager( 871): Process com.example.myfirstapp (pid 3812)(adj 13) has died(104,205)

Here's the working code :
MainActivity.class
import android.content.Intent;
import android.os.Bundle;
import android.support.v7.app.ActionBarActivity;
import android.util.Log;
import android.view.View;
import android.widget.EditText;
public class MainActivity extends ActionBarActivity {
EditText et;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
et = (EditText) findViewById(R.id.editText1);
}
public void Go(View v)
{
Log.d("check", "Pressed");
String value = et.getText().toString();
Intent intent = new Intent(MainActivity.this, SecondActivity.class);
intent.putExtra("key", value);
startActivity(intent);
}
}
SecondActivity.class
import android.os.Bundle;
import android.support.v7.app.ActionBarActivity;
import android.util.Log;
import android.widget.TextView;
public class SecondActivity extends ActionBarActivity {
TextView textv;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.new_activity);
String txt = getIntent().getStringExtra("key");
Log.d("check", "got : " +txt);
textv = (TextView) findViewById(R.id.textView1);
textv.setText(txt);
}
}
res/layout/activity_main.xml
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="#dimen/activity_vertical_margin"
android:paddingLeft="#dimen/activity_horizontal_margin"
android:paddingRight="#dimen/activity_horizontal_margin"
android:paddingTop="#dimen/activity_vertical_margin"
tools:context="com.example.testproject.MainActivity" >
<EditText
android:id="#+id/editText1"
android:layout_width="wrap_content"
android:layout_height="40dp"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:layout_marginLeft="67dp"
android:layout_marginTop="46dp"
android:ems="10" />
<Button
android:id="#+id/button1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_centerVertical="true"
android:onClick="Go"
android:text="Button" />
</RelativeLayout>
res/layout/new_activity.xml
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<TextView
android:id="#+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:layout_marginTop="74dp"
android:text="Large Text"
android:textAppearance="?android:attr/textAppearanceLarge" />
</RelativeLayout>
AndroidManifest.xml
<application
android:allowBackup="true"
android:icon="#drawable/ic_launcher"
android:label="#string/app_name"
android:theme="#style/AppTheme" >
<activity
android:name=".MainActivity"
android:label="#string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity android:name=".SecondActivity"></activity> // Registered the newly created activity
</application>
Output :
Logcat :
BY SEEING YOUR LOGCAT, I got there is a problem in your Theme.
You didn't declared AppTheme in AndroidManifest.xml file
android:theme="#style/AppTheme"

Try by This Sample Code I have made For You.
mainactivity.xml Code
<EditText
android:id="#+id/edtMessage"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:hint="message"
/>
<Button
android:id="#+id/btnSend"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Send"
/>
MainActivity.class
Button btnSend;
EditText edtMessage;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
edtMessage=(EditText)findViewById(R.id.edtMessage);
btnSend=(Button)findViewById(R.id.btnSend);
btnSend.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
String Message=edtMessage.getText().toString();
Intent intent=new Intent(getApplicationContext(),Second.class);
intent.putExtra("Message", Message);
startActivity(intent);
}
});
}
second.xml
<TextView
android:id="#+id/tviMessage"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textColor="#000000"
/>
Second.class
TextView tviMessage;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.second);
tviMessage=(TextView)findViewById(R.id.tviMessage);
Bundle extras = getIntent().getExtras();
String message = extras.getString("Message");
tviMessage.setText(message);
}
Manifesto.xml
<application
android:allowBackup="true"
android:icon="#drawable/ic_launcher"
android:label="#string/app_name"
android:theme="#style/AppTheme" >
<activity
android:name=".MainActivity"
android:label="#string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name=".Second"
android:label="#string/app_name" >
</activity>

By using logcat with this command:
adb logcat | grep `adb shell ps | grep com.example.myfirstapp | cut -c10-15`
I was able to find the error causing the app to crash. It came from missing the line:
android:theme="#style/Theme.AppCompat.Light"
In the Manifest.xml file. This is required by the Activity bar compatibility class. This part was completely overlooked in the tutorial, presumably because IDEs do this part automatically.
Thank you to everybody for their help and suggestions, it helped me keep looking and trying things until I finally found my solution.

How to solve java.lang.RuntimeException: Unable to start activity?

i'm making an app that has a sign in or log in button, the log in button works perfectly but the sign up button gives me a fatal error, making the AVD to stop running the app, this is the code of the sign up activity
#Override
public void onCreate(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.signup_activity);
// Set up the signup form.
usernameView = (EditText) findViewById(R.id.username);
passwordView = (EditText) findViewById(R.id.password);
passwordAgainView = (EditText) findViewById(R.id.passwordAgain);
// Set up the submit button click handler
findViewById(R.id.action_button).setOnClickListener(new View.OnClickListener() {
public void onClick(View view) {
// Validate the sign up data
boolean validationError = false;
StringBuilder validationErrorMessage =
new StringBuilder(getResources().getString(R.string.error_intro));
if (isEmpty(usernameView)) {
validationError = true;
validationErrorMessage.append(getResources().getString(R.string.error_blank_username));
}
if (isEmpty(passwordView)) {
if (validationError) {
validationErrorMessage.append(getResources().getString(R.string.error_join));
}
validationError = true;
validationErrorMessage.append(getResources().getString(R.string.error_blank_password));
}
if (!isMatching(passwordView, passwordAgainView)) {
if (validationError) {
validationErrorMessage.append(getResources().getString(R.string.error_join));
}
validationError = true;
validationErrorMessage.append(getResources().getString(
R.string.error_mismatched_passwords));
}
validationErrorMessage.append(getResources().getString(R.string.error_end));
// If there is a validation error, display the error
if (validationError) {
Toast.makeText(SignUpActivity.this, validationErrorMessage.toString(), Toast.LENGTH_LONG)
.show();
return;
}
// Set up a progress dialog
final ProgressDialog dlg = new ProgressDialog(SignUpActivity.this);
dlg.setTitle("Please wait.");
dlg.setMessage("Signing up. Please wait.");
dlg.show();
// Set up a new Parse user
ParseUser user = new ParseUser();
user.setUsername(usernameView.getText().toString());
user.setPassword(passwordView.getText().toString());
// Call the Parse signup method
user.signUpInBackground(new SignUpCallback() {
#Override
public void done(ParseException e) {
dlg.dismiss();
if (e != null) {
// Show the error message
Toast.makeText(SignUpActivity.this, e.getMessage(), Toast.LENGTH_LONG).show();
} else {
// Start an intent for the dispatch activity
Intent intent = new Intent(SignUpActivity.this, DispatchActivity.class);
intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TASK | Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(intent);
}
}
});
}
});
}
private boolean isEmpty(EditText etText) {
if (etText.getText().toString().trim().length() > 0) {
return false;
} else {
return true;
}
}
private boolean isMatching(EditText etText1, EditText etText2) {
if (etText1.getText().toString().equals(etText2.getText().toString())) {
return true;
} else {
return false;
}
}
and here is the manifest
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<application
android:allowBackup="true"
android:icon="#drawable/ic_launcher"
android:label="#string/app_name"
android:theme="#style/AppTheme"
android:name=".ParseStarter">
<activity
android:screenOrientation="portrait"
android:name=".MainActivity"
android:label="#string/app_name" >
</activity>
<activity android:name=".SignUpOrLogInActivity"
android:label="#string/app_name">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity >
<activity android:name=".DispatchActivity"/>
<activity android:name=".LoginActivity" />
<activity android:name=".SignUpActivity" />
<meta-data android:name="com.facebook.sdk.ApplicationId" android:value="#string/facebook_app_id"/>
</application>
here is the logCat
Process: com.sebasdeldihotmail.mediocre11, PID: 2020
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.sebasdeldihotmail.mediocre11/com.sebasdeldihotmail.mediocre11.SignUpActivity}: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.view.View.setOnClickListener(android.view.View$OnClickListener)' on a null object reference
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2298)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2360)
at android.app.ActivityThread.access$800(ActivityThread.java:144)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1278)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5221)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:899)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:694)
Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.view.View.setOnClickListener(android.view.View$OnClickListener)' on a null object reference
at com.sebasdeldihotmail.mediocre11.SignUpActivity.onCreate(SignUpActivity.java:35)
at android.app.Activity.performCreate(Activity.java:5933)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1105)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2251)
            
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2360)
            
at android.app.ActivityThread.access$800(ActivityThread.java:144)
            
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1278)
            at android.os.Handler.dispatchMessage(Handler.java:102)
            at android.os.Looper.loop(Looper.java:135)
            at android.app.ActivityThread.main(ActivityThread.java:5221)
            at java.lang.reflect.Method.invoke(Native Method)
            at java.lang.reflect.Method.invoke(Method.java:372)
            at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:899)
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:694)
here is the code of the class that has the button that calls the sign up activity
#Override
public void onCreate(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.signinorsignup_activity);
// Log in button click handler
((Button) findViewById(R.id.login)).setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
// Starts an intent of the log in activity
startActivity(new Intent(SignUpOrLogInActivity.this, LoginActivity.class));
}
});
// Sign up button click handler
((Button) findViewById(R.id.signup)).setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
// Starts an intent for the sign up activity
startActivity(new Intent(SignUpOrLogInActivity.this, SignUpActivity.class));
}
});
}
}
and here is the layout of the sign up
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#67AAE4">
<EditText
android:id="#+id/username"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="#string/prompt_username"
android:inputType="textEmailAddress"
android:maxLines="1"
android:singleLine="true" />
<EditText
android:id="#+id/password"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="#string/prompt_password"
android:inputType="textPassword"
android:maxLines="1"
android:singleLine="true" />
<EditText
android:id="#+id/passwordAgain"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="#string/prompt_password_again"
android:imeActionLabel="#string/action_sign_in_short"
android:imeOptions="actionUnspecified"
android:inputType="textPassword"
android:maxLines="1"
android:singleLine="true" />
</LinearLayout>
and here is the layout where the sign up button appears
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#67AAE4">
<Button
android:id="#+id/signup"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Sign Up"/>
<Button
android:id="#+id/login"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Login"/>
<com.facebook.widget.LoginButton
android:id="#+id/authButton"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal"
android:layout_marginTop="30dp"
/>
Thank you very much for reading :) .

java.lang.NullPointerException: Attempt to invoke virtual method 'void android.view.View.setOnClickListener(android.view.View$OnClickListener)' on a null object reference
It appears your signup_activity.xml layout does not have a view with id action_button, and findViewById() returns null.

The view you are adding the onClickListener to, r.id.action_button, is not found, hence the NullPointerException.
So make sure you have it in the current view, signup_activity.xml.
More:
To make your 'onCreate'-method less chunky, and to avoid this to happen again, consider using android:onClick on your button in the layoutfile, signup_activity.xml.
<Button
android:id="#+id/action_button"
android:onClick="onSignUpClick"
...
/>
Then in SignUpActivity.java add the method:
public void onSignUpClick(View view) {
// add code here instead of creating onClickListener in onCreate...
}

TypeFace for TextView, Edittext and Button giving an error

I tried to implement custom font on TextView using the TypeFace class like this:
package com.royal.bikers;
import android.app.Activity;
import android.os.Bundle;
public class AboutUs extends Activity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.about);
TextView aboutUs1 = (TextView) findViewById(R.id.aboutUs1);
TextView aboutUs2 = (TextView) findViewById(R.id.aboutUs2);
TextView aboutUs3 = (TextView) findViewById(R.id.aboutUs3);
TextView aboutUs4 = (TextView) findViewById(R.id.aboutUs4);
TextView aboutUs5 = (TextView) findViewById(R.id.aboutUs5);
TextView aboutUsTitle = (TextView) findViewById(R.id.aboutUsTitle);
Typeface tf = Typeface.createFromAsset(getAssets(), "fonts/Roboto-Thin.ttf");
aboutUs1.setTypeface(tf);
aboutUs2.setTypeface(tf);
aboutUs3.setTypeface(tf);
aboutUs4.setTypeface(tf);
aboutUs5.setTypeface(tf);
aboutUsTitle.setTypeface(tf);
}
}
But the app's crashing:
05-09 13:42:13.525: E/AndroidRuntime(24251): FATAL EXCEPTION: main
05-09 13:42:13.525: E/AndroidRuntime(24251): Process: com.royal.bikers, PID: 24251
05-09 13:42:13.525: E/AndroidRuntime(24251): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.royal.bikers/com.royal.bikers.AboutUs}: java.lang.RuntimeException: native typeface cannot be made
05-09 13:42:13.525: E/AndroidRuntime(24251): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2195)
05-09 13:42:13.525: E/AndroidRuntime(24251): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2245)
05-09 13:42:13.525: E/AndroidRuntime(24251): at android.app.ActivityThread.access$800(ActivityThread.java:135)
05-09 13:42:13.525: E/AndroidRuntime(24251): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1196)
05-09 13:42:13.525: E/AndroidRuntime(24251): at android.os.Handler.dispatchMessage(Handler.java:102)
05-09 13:42:13.525: E/AndroidRuntime(24251): at android.os.Looper.loop(Looper.java:136)
05-09 13:42:13.525: E/AndroidRuntime(24251): at android.app.ActivityThread.main(ActivityThread.java:5017)
05-09 13:42:13.525: E/AndroidRuntime(24251): at java.lang.reflect.Method.invoke(Native Method)
05-09 13:42:13.525: E/AndroidRuntime(24251): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:779)
05-09 13:42:13.525: E/AndroidRuntime(24251): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:595)
05-09 13:42:13.525: E/AndroidRuntime(24251): Caused by: java.lang.RuntimeException: native typeface cannot be made
05-09 13:42:13.525: E/AndroidRuntime(24251): at android.graphics.Typeface.<init>(Typeface.java:175)
05-09 13:42:13.525: E/AndroidRuntime(24251): at android.graphics.Typeface.createFromAsset(Typeface.java:149)
05-09 13:42:13.525: E/AndroidRuntime(24251): at com.royal.bikers.AboutUs.onCreate(AboutUs.java:23)
05-09 13:42:13.525: E/AndroidRuntime(24251): at android.app.Activity.performCreate(Activity.java:5231)
05-09 13:42:13.525: E/AndroidRuntime(24251): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087)
05-09 13:42:13.525: E/AndroidRuntime(24251): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2159)
05-09 13:42:13.525: E/AndroidRuntime(24251): ... 9 more
I had tried using another font called Usuzi and it worked fine, but I want to change it to Roboto-Thin and it isn't working withit.
Here's my AboutUs.xml:
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="#+id/aboutUs"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#drawable/ic_bg"
tools:context="com.royal.bikers.AboutUs"
tools:ignore="MergeRootFrame" >
<TextView
android:id="#+id/aboutUsTitle"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_marginTop="65dp"
android:gravity="center_horizontal"
android:text="#string/aboutUs"
android:textColor="#000"
android:textSize="25sp"
android:textStyle="bold" />
<ScrollView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_marginBottom="105dp"
android:layout_marginLeft="15dp"
android:layout_marginRight="15dp"
android:layout_marginTop="110dp"
android:background="#59FFFFFF" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center_vertical|center_horizontal"
android:orientation="vertical" >
<TextView
android:id="#+id/aboutUs1"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_marginLeft="20dp"
android:layout_marginRight="20dp"
android:layout_marginTop="20dp"
android:text="#string/aboutUs1"
android:textColor="#000"
android:textSize="20sp" />
<TextView
android:id="#+id/aboutUs2"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_marginLeft="20dp"
android:layout_marginRight="20dp"
android:layout_marginTop="30dp"
android:text="#string/aboutUs2"
android:textColor="#000"
android:textSize="20sp" />
<TextView
android:id="#+id/aboutUs3"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_marginLeft="20dp"
android:layout_marginRight="20dp"
android:layout_marginTop="30dp"
android:text="#string/aboutUs3"
android:textColor="#000"
android:textSize="20sp" />
<TextView
android:id="#+id/aboutUs4"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_marginLeft="20dp"
android:layout_marginRight="20dp"
android:layout_marginTop="30dp"
android:text="#string/aboutUs4"
android:textColor="#000"
android:textSize="20sp" />
<TextView
android:id="#+id/aboutUs5"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_marginBottom="50dp"
android:layout_marginLeft="20dp"
android:layout_marginRight="20dp"
android:layout_marginTop="10dp"
android:text="#string/aboutUs5"
android:textColor="#000"
android:textSize="20sp" />
</LinearLayout>
</ScrollView>
</RelativeLayout>
Here's the Manifest:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.royal.bikers"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="13"
android:targetSdkVersion="19" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<application
android:allowBackup="true"
android:icon="#drawable/ic_launcher"
android:label="#string/app_name"
android:theme="#android:style/Theme.Holo.Light.NoActionBar" >
<activity
android:name="com.royal.bikers.Splash"
android:label="#string/app_name"
android:screenOrientation="portrait"
android:windowSoftInputMode="stateHidden" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name="com.royal.bikers.Home"
android:label="#string/app_name"
android:screenOrientation="portrait"
android:windowSoftInputMode="stateHidden" >
</activity>
<activity
android:name="com.royal.bikers.Login"
android:label="#string/app_name"
android:screenOrientation="portrait"
android:windowSoftInputMode="stateHidden" >
</activity>
<activity
android:name="com.royal.bikers.Register"
android:label="#string/app_name"
android:screenOrientation="portrait"
android:windowSoftInputMode="stateHidden" >
</activity>
<activity
android:name="com.royal.bikers.AboutUs"
android:label="#string/app_name"
android:screenOrientation="portrait"
android:windowSoftInputMode="stateHidden" >
</activity>
<activity
android:name="com.royal.bikers.Search"
android:label="#string/app_name"
android:screenOrientation="portrait"
android:windowSoftInputMode="stateHidden" >
</activity>
<activity
android:name="com.royal.bikers.RegisterEvent"
android:label="#string/app_name"
android:screenOrientation="portrait"
android:windowSoftInputMode="stateHidden" >
</activity>
<activity
android:name="com.royal.bikers.Event"
android:label="#string/app_name"
android:screenOrientation="portrait"
android:windowSoftInputMode="stateHidden" >
</activity>
<activity
android:name="com.royal.bikers.Account"
android:label="#string/app_name"
android:screenOrientation="portrait"
android:windowSoftInputMode="stateHidden" >
</activity>
<activity
android:name="com.royal.bikers.ChangePassword"
android:label="#string/app_name"
android:screenOrientation="portrait"
android:windowSoftInputMode="stateHidden" >
</activity>
</application>
</manifest>
Please suggest me if there's any other method except creating CustomTextView class which extends TextView as given here

Ok then try this also,may be its a stream problem
public class Typefaces {
private static final String TAG = "Typefaces";
private static final Hashtable<String, Typeface> cache = new Hashtable<String, Typeface>();
public static Typeface get(Context c, String assetPath) {
synchronized (cache) {
if (!cache.containsKey(assetPath)) {
try {
Typeface t = Typeface.createFromAsset(c.getAssets(),
assetPath);
cache.put(assetPath, t);
} catch (Exception e) {
Log.e(TAG, "Could not get typeface '" + assetPath
+ "' because " + e.getMessage());
return null;
}
}
return cache.get(assetPath);
}
}
}

here is the answer just remove the fonts string and use only font name.
Typeface tf = Typeface.createFromAsset(getAssets(),"Roboto-Thin.ttf");

Make custom fontloader
public class FontLoader {
private static Typeface quickSandTypeface = null;
private static Typeface quickSandTypefaceBold = null;
public static void loadFonts(Context context) {
quickSandTypeface = Typeface.createFromAsset(context.getAssets(), "quicksand_regular.ttf");
quickSandTypefaceBold = Typeface.createFromAsset(context.getAssets(), "quicksand_bold.ttf");
}
public static Typeface getQuickSandTypeface() {
return quickSandTypeface;
}
public static Typeface getQuickSandTypefaceBold() {
return quickSandTypefaceBold;
}
public static void setQuickSandTypeface(EditText... editTextViews) {
if (null != editTextViews && null != quickSandTypeface) {
for (int i = 0; i < editTextViews.length; i++) {
editTextViews[i].setTypeface(getQuickSandTypeface());
}
}
}
Use in your activity this way
FontLoader.setQuickSandTypeface(yourEditText)

Try this it ll help you.
Typeface font = Typeface.createFromAsset(getApplicationContext().getAssets(),"fonts/helvetica.ttf");
ttf file should be in small letter.