In my application im trying to switch the visibility of two transparent buttons (i know this is rather hackish) within a RealViewSwitcher. I am changing the visibility based upon the current page of the RealViewSwitcher. I can get the first button to work, however the second never becomes active. Here is my code:
///////////////
if(realViewSwitcher.getCurrentScreen() == 0)
{
final Button btn1 = (Button)findViewById(R.id.btn1);
btn1.setOnClickListener(new View.OnClickListener()
{
#Override
public void onClick(View v)
{
Intent intent = new Intent();
intent.setAction(Intent.ACTION_VIEW);
intent.addCategory(Intent.CATEGORY_BROWSABLE);
intent.setData(Uri.parse("http://www.test.com"));
startActivity(intent);
btn1.setVisibility(View.GONE);
}
});
}
else if(realViewSwitcher.getCurrentScreen() == 2)
{
final Button btn2 = (Button)findViewById(R.id.btn2);
btn2.setVisibility(0);
btn2.setOnClickListener(new View.OnClickListener()
{
#Override
public void onClick(View v)
{
Intent intent = new Intent(Intent.ACTION_SEND);
String[] tos = { "info#email.com" };
intent.putExtra(Intent.EXTRA_EMAIL, tos);
intent.putExtra(Intent.EXTRA_TEXT, "body");
intent.putExtra(Intent.EXTRA_SUBJECT, "subject");
intent.setType("message/rfc882");
Intent.createChooser(intent, "Choose Email Client");
}
});
}
///////////////
//end
/////////////////////
And here is the xml
<Button
android:id="#+id/btn1"
android:layout_width="100dp"
android:layout_height="100dp"
android:background="#null"/>
<Button
android:id="#+id/btn2"
android:layout_width="100dp"
android:layout_height="100dp"
android:background="#null"
android:visibility="gone"/>
Your code just needs a little cleaning.
First of all, your buttons should be declared as fields. As it is, they are simply instance variables of the if statement.
The click listeners should be declared outside the if statement, for the same reason. Declare them in onCreate() or wherever suits your fancy.
Set up a switch for the getCurrentWindow(). It's easier to work with than an if... else if... else if....
Might I suggest:
final Button btn1 = (Button) findViewById(R.id.btn1);
final Button btn2 = (Button )findViewById(R.id.btn2);
//Inside onCreate() or similar
btn1.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent intent = new Intent();
intent.setAction(Intent.ACTION_VIEW);
intent.addCategory(Intent.CATEGORY_BROWSABLE);
intent.setData(Uri.parse("http://www.test.com"));
intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK); //Required to start a new activity
startActivity(intent);
btn1.setVisibility(View.GONE);
}
});
//In the same place
btn2.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent intent = new Intent(Intent.ACTION_SEND);
String[] tos = { "info#email.com" };
intent.putExtra(Intent.EXTRA_EMAIL, tos);
intent.putExtra(Intent.EXTRA_TEXT, "body");
intent.putExtra(Intent.EXTRA_SUBJECT, "subject");
intent.setType("message/rfc882");
Intent.createChooser(intent, "Choose Email");
btn2.setVisibility(View.VISIBLE);
}
});
//Later, in your other functional code
switch (realViewSwitcher.getCurrentScreen()) {
case 0:
//do your stuff
break;
case 2:
//other stuff
break;
default: //If you need it
throw new Exception("Oops...");
}
Related
I have 2 Activities. On 2nd activity i have data which i want to move by button "Back" to 1st Activity.
Usually i moving by something like this:
button12.setOnClickListener(new View.OnClickListener() {
public void onClick(View view) {
pass=editText2.getText().toString();
Intent intent = new Intent(FirstActivity.this, MapsActivity.class);
intent.putExtra("pass_value", pass);
startActivity(intent);
}
});
But now i dont want to start Activity, instead of this i want close Activity, so i need to use finish()
Currently i created this, but no working:
b2.setOnClickListener(new View.OnClickListener() {
public void onClick(View view) {
Intent intent = new Intent(MainActivity.this, FirstActivity.class);
intent.putExtra("number", numberOfTrue);
finish();
}
});
I need something more in this code, but i dont know what.
Start a new activity with
Intent intent = new Intent(FirstActivity.this, MapsActivity.class);
intent.putExtra("pass_value", pass);
startActivityForResult(intent,1)
You can use setResult method to acheive your desired result
Intent output = new Intent();
output.putExtra("number", numberOfTrue);
setResult(Activity.RESULT_OK, output);
finish();
get Your result in FirstActivity
#Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (requestCode == 1 && resultCode == Activity.RESULT_OK && data != null) {
int num = data.getIntExtra("pass_value");
}
}
b2.setOnClickListener(new View.OnClickListener() {
public void onClick(View view) {
finish();
Intent intent = new Intent(this, FirstActivity.class);
intent.putExtra("number", numberOfTrue); }});
You need to open by function startActivityForResult
startActivityForResult(Intent intent, int requestCode)
And get the data returned in the function
onActivityResult
As an example you can see a face to the camera for a picture
I'm new here and I think I have made a mistake in Java but I have no idea how to correct it. Most of the people with similar issue had much more complicated projects and I couldn't resolve my issue by looking at their code.
I want to use different buttons (9 of them) to start different activities, but when I started with adding the second, only the activity 1 (LeftArmActivity) popped up. Whatever I changed in the XML to call the proper method for HeadActivity to launch, only the LeftActivity launches. I've got a hint from other topics that it may be caused by overwriting of the intent, but I have no idea how to fix this. I tried to use getActivity() but it just crashed. Could you please help me with this?
#UPDATE
Okay, I used the switch recommended below, but now the app won't start at all :/
public class MainActivity extends AppCompatActivity {
Context context = this;
Button LeftArmOpener = (Button) findViewById(R.id.LeftArmOpener);
Button HeadOpener = (Button) findViewById(R.id.HeadOpener);
Button RightArmOpener = (Button) findViewById(R.id.RightArmOpener);
Button CreditsOpener = (Button) findViewById(R.id.CreditsOpener);
Button TrunkOpener = (Button) findViewById(R.id.TrunkOpener);
Button NextOpener = (Button) findViewById(R.id.NextOpener);
Button RightLegOpener = (Button) findViewById(R.id.RightLegOpener);
Button ExitOpener = (Button) findViewById(R.id.ExitOpener);
Button LeftLegOpener = (Button) findViewById(R.id.LeftLegOpener);
protected View.OnClickListener mClick;
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mClick = new View.OnClickListener() {
#Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.RightArmOpener: {
Intent i1 = new Intent(context, LeftArmActivity.class);
startActivity(i1);
break;
}
case R.id.HeadOpener: {
Intent i2 = new Intent(context, HeadActivity.class);
startActivity(i2);
break;
}
case R.id.LeftArmOpener: {
Intent i3 = new Intent(context, LeftArmActivity.class);
startActivity(i3);
break;
}
case R.id.CreditsOpener: {
Intent i4 = new Intent(context, CreditsActivity.class);
startActivity(i4);
break;
}
case R.id.TrunkOpener: {
Intent i5 = new Intent(context, TrunkActivity.class);
startActivity(i5);
break;
}
case R.id.NextOpener: {
Intent i6 = new Intent(context, NextActivity.class);
startActivity(i6);
break;
}
case R.id.RightLegOpener: {
Intent i7 = new Intent(context, RightLegActivity.class);
startActivity(i7);
break;
}
case R.id.ExitOpener: {
Intent i8 = new Intent(context, ExitActivity.class);
startActivity(i8);
break;
}
case R.id.LeftLegOpener: {
Intent i9 = new Intent(context, LeftLegActivity.class);
startActivity(i9);
break;
}
//create this for all 9 buttons
}
}
};
LeftArmOpener.setOnClickListener(mClick);
HeadOpener.setOnClickListener(mClick);
RightArmOpener.setOnClickListener(mClick);
CreditsOpener.setOnClickListener(mClick);
TrunkOpener.setOnClickListener(mClick);
NextOpener.setOnClickListener(mClick);
RightLegOpener.setOnClickListener(mClick);
ExitOpener.setOnClickListener(mClick);
LeftLegOpener.setOnClickListener(mClick);
}
}
Update your Code with this
public class MainActivity extends AppCompatActivity {
#Override
protected void onCreate (Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
public void openHead(View view){
startActivity(new Intent(MainActivity.this, LessonOne.class));
//startActivity(t);
}
public void openLeftArm(View view){
Intent i = new Intent(MainActivity.this, LeftArmActivity.class);
startActivity(i);
}
}
//the problem is you are calling startActivity() two time and Passing getActivity() from Actvity.
You said you have 9 buttons so i think u should use switch case in such scenarios see the following code:-
Here is how my Button looks in xml no android:onClick is used here
<Button
android:id="#+id/btn1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Button 1" />
This part goes in Activity:-
Context context = this;
Button btn1 = (Button) findViewById(R.id.btn1);
Button btn2 = (Button) findViewById(R.id.btn2);
Button btn9 = (Button) findViewById(R.id.btn9);
btn1.setOnClickListener(mClick);
btn2.setOnClickListener(mClick);
btn9.setOnClickListener(mClick);
View.OnClickListener mClick = new View.OnClickListener() {
#Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.btn1: {
Intent i1 = new Intent(context, First.class);
startActivity(i1);
break;
}
case R.id.btm2: {
Intent i2 = new Intent(context, Second.class);
startActivity(i2);
break;
}
//create this for all 9 buttons
}
}
};
On the top declare your button; (before the oncreate method)
Button yourbuttonname;
Then on the oncreate method:
declare the view of the button:
yourbuttonname = (Button) findViewById(R.id.buttonNameInYourXML);
yourbuttonname.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent intent = new Intent(ActualActivity.this, ActivityYouWantToGo.class);
intent.putExtra("tag",valueassociatedtotag); // if you want to pass some data
startActivity(intent)
}
});
In my app i have a button to select a contact from contacts phone and a button to start a call phone to this number. So when i click on the button to select the contact, the complete action using dialog appears with more apps to choose as well as when i click on the button to star the call phone. How can i avoid the dialog to access contacts and to do a call phone directly?
Partial code of my activity:
contacts.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent intent = new Intent(Intent.ACTION_PICK, ContactsContract.Contacts.CONTENT_URI);
startActivityForResult(intent, 0);
}
});
start.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
String numeroDiTelefono = dati.getString("numeroDiTelefono");
Intent callIntent = new Intent(Intent.ACTION_CALL);
callIntent.setData(Uri.parse("tel:" + numeroDiTelefono));
callIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(callIntent);
}
});
Make sure you have added the permission in the Manifest file:
<uses-permission android:name="android.permission.CALL_PHONE" />
And all you should need for the Intent is:
Intent callIntent = new Intent(Intent.ACTION_CALL);
callIntent.setData(Uri.parse("tel:"+numeroDiTelefono));
startActivity(callIntent);
Basically that dialog means you have more than one contacts app installed on your phone. This is a default Android system behavior when you call any kind of common intent actions.
What you can do is make the intent more specific to the app you're looking for.
By specifing
a) the specific data uri
b) the package name
c) set the content type, etc
Also try this.
Intent i = new Intent(Intent.ACTION_PICK, ContactsContract.CommonDataKinds.Phone.CONTENT_URI);
startActivityForResult(i, PICK_CONTACT);
public void onClick(View view) {
String number = String.valueOf(bundle.getLong("phone"));
Uri call = Uri.parse("tel:" + number);
Intent intent = new Intent(Intent.ACTION_DIAL, call);
startActivity(intent);
}
I have my MainActivity, and I create an Intent to a SecondActivity, when a button is pressed,
I want to return to activity. But when I create the intent and pass (this, MainActivity.class) through the constructor, I get an error: The intent constructor is undefined. Can someone help me?
public void goBackToMainActivity(View view) {
//Button for retrieving the user's current location:
final Button backButton = (Button) findViewById(R.id.back_button);
//Listens for button presses and releases:
backButton.setOnTouchListener(new OnTouchListener() {
#Override
public boolean onTouch(View v, MotionEvent event) {
//When the button is pressed:
if(event.getAction() == MotionEvent.ACTION_DOWN) {
//Change image for touch indication:
backButton.setBackgroundResource(R.drawable.back_button);
//When the button is released:
} else if (event.getAction() == MotionEvent.ACTION_UP) {
//Change image back to default:
backButton.setBackgroundResource(R.drawable.back_button_selected);
goBackToMainActivity();
}
return false;
}
});
}
public void goBackToMainActivity() {
finish();
Intent startIntent = new Intent(this, MainActivity.class);
startActivity(startIntent);
}
I guess you are creating the intent inside an OnClickListener, thus you need to use the code below:
Intent intent = new Intent(SecondActivity.this, MainActivity.class);
The reason is that if you do not specify SecondActivity.this, you are actually passing the OnClickListener into the intent constructor.
Change your goback method:
public void goBackToMainActivity() {
Intent startIntent = new Intent(CurrentActivityName.this, MainActivity.class);
startActivity(startIntent);
finish();
}
First clear all the existing activities by writing code:
startActivity(intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP));
Then call the intent to the MainActivity
Intent i=new Intent(CurrentActivity.this, MainActivity.class);
startActivity(i);
Try calling finish() on button click in second activity to return to the main activity.
public void onClick(View v) {
finish();
}
I am trying to switch activity's with the use of a button.
Skillz.java
Button b2 =(Button)findViewById(R.id.button2);
b2.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
Intent myintent = new Intent();
String packageName="marco.skillz.app";
String className="marco.skillz.app.act2";
myintent.setClassName(packageName, className);
startActivity(myintent);
}
});
act2.java
#Override
public void onCreate(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.page2);
}
When the app run in the emulator I get the following error:
The application "app name" (process marco.skillz.app) has stopped unexpectedly.
FIXED!! I feel so stupid i had android:name=".act1" when it should be android:name=".act2".
Thanks for all your input :P
Please check like this
public void onClick(View v) {
Intent myintent = new Intent(Skillz.this,act2.class);
startActivity(myintent);
}
Add act2 activity in the manifest file
Try this Skillz.java in oncreate
Button b2 =(Button)findViewById(R.id.button2);
b2.setOnClickListener(new OnClickListener()
{public void onClick
(View v) {
Intent i = new Intent(getApplicationContext(), act2.class);
startActivity(i);
}
});