was testing som things in Android Studios and ran in to this error:
FATAL EXCEPTION: main
Process: com.meisolsson.app, PID: 25610
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.meisolsson.app/com.meisolsson.app.LoginActivity}: java.lang.IllegalArgumentException: No view found for id 0x7f070053 (com.meisolsson.app:id/container) for fragment PlaceholderFragment{4284e750 #0 id=0x7f070053}
Here is my LoginActivity.java
package com.meisolsson.app;
import android.support.v7.app.ActionBarActivity;
import android.support.v7.app.ActionBar;
import android.support.v4.app.Fragment;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.os.Build;
import android.view.Window;
import android.widget.Button;
public class LoginActivity extends ActionBarActivity {
private Button loginButton;
#Override
protected void onCreate(Bundle savedInstanceState) {
this.requestWindowFeature(Window.FEATURE_NO_TITLE);
super.onCreate(savedInstanceState);
setContentView(R.layout.fragment_login);
if (savedInstanceState == null) {
getSupportFragmentManager().beginTransaction()
.add(R.id.container, new PlaceholderFragment())
.commit();
}
this.setContentView(R.layout.fragment_login);
this.loginButton = (Button)this.findViewById(R.id.button);
this.loginButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
finish();
}
});
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.login, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
public static class PlaceholderFragment extends Fragment {
public PlaceholderFragment() {
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_login, container, false);
return rootView;
}
}
}
And my fragment_login.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: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=".LoginActivity$PlaceholderFragment"
android:focusable="true"
android:background="#fcff00">
<EditText
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="#+id/editText"
android:hint="#string/user"
android:padding="10dp"
android:background="#ffffff"
android:layout_above="#+id/editText2"
android:layout_alignLeft="#+id/editText2"
android:layout_alignRight="#+id/editText2" />
<EditText
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:inputType="textPassword"
android:ems="10"
android:id="#+id/editText2"
android:layout_centerVertical="true"
android:layout_centerHorizontal="true"
android:hint="#string/pass"
android:background="#ffffff"
android:padding="10dp" />
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/login"
android:id="#+id/button"
style="#style/AppTheme"
android:background="#ff5900"
android:shadowColor="#000000"
android:layout_below="#+id/editText2"
android:layout_alignLeft="#+id/editText"
android:layout_alignRight="#+id/editText2"
android:clickable="true"/>
</RelativeLayout>
The problem is the way you're doing this. For the Activity, you don't set the Fragment's view, you set a separate view that has a spot to put a Fragment. Depending on how you did your PlaceHolderFragment, the following ought to get a working app.
First add this file:
activity_main.xml
<FrameLayout
android:id="#+id/container"
android:layout_width="match_parent"
android:layout_height="match_parent"/>
Then change this stuff in your Activity:
LoginActivity.java
/* Same stuff*/
#Override
protected void onCreate(Bundle savedInstanceState) {
this.requestWindowFeature(Window.FEATURE_NO_TITLE);
super.onCreate(savedInstanceState);
//This is the important change right here!
setContentView(R.layout.activity_main);
if (savedInstanceState == null) {
getSupportFragmentManager().beginTransaction()
.add(R.id.container, new PlaceholderFragment())
.commit();
}
//The stuff that you had handling buttons should go in your
//PlaceHolderFragment class's onCreateView() method
}
I hope this helps. Good Luck!
Related
I'm not using standard drawer from android studio but I'm using SlidingPanelLayout to create drawer (I made from this tutorials https://nganthony.github.io/2016/01/24/implementing-android-mini-navigation-drawer.html)
My drawer is work well but I can't figure out how can I make button link to another fragment
I use this method to call fragment in standard drawer
if (id == R.id.nav_sms) {
SMSFragment smsFragment = new SMSFragment();
FragmentManager manager = getSupportFragmentManager();
manager.beginTransaction().replace(
R.id.layout_main,
smsFragment,
smsFragment.getTag()
).commit();
My Project files
MainActivity.java
package com.th.ac.sd;
import android.os.Bundle;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.Snackbar;
import android.support.v4.app.FragmentManager;
import android.support.v4.view.GravityCompat;
import android.support.v4.widget.DrawerLayout;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.View;
import android.view.Menu;
import android.view.MenuItem;
import com.ng.anthony.mininavigationdrawer.R;
public class MainActivity extends AppCompatActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
fab.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG)
.setAction("Action", null).show();
}
});
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_main, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
}
MasterFragment.java
package com.th.ac.sd;
import android.os.Bundle;
import android.support.v4.app.ListFragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import com.ng.anthony.mininavigationdrawer.R;
/**
* Created by Anthony on 16-01-25.
*/
public class MasterFragment extends ListFragment {
public View onCreateView (LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_master, container);
setListAdapter(new MenuListAdapter(R.layout.row_menu_action_item, getActivity(), MenuActionItem.values()));
return view;
}
}
MenuActionItem.java
package com.th.ac.sd;
/**
* Created by Anthony on 16-01-25.
*/
public enum MenuActionItem {
ITEM1,
ITEM2,
ITEM3,
ITEM4,
ITEM5
}
MenuListAdapter.java
package com.th.ac.sd;
import android.app.Activity;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.ImageView;
import android.widget.TextView;
import com.ng.anthony.mininavigationdrawer.R;
/**
* Created by Anthony on 16-01-25.
*/
public class MenuListAdapter extends ArrayAdapter<MenuActionItem> {
int resource;
Activity activity;
public MenuListAdapter(int resource, Activity activity, MenuActionItem[] items) {
super(activity, resource, items);
this.resource = resource;
this.activity = activity;
}
public View getView (int position, View convertView, ViewGroup parent) {
View rowView = convertView;
if(rowView == null) {
rowView = activity.getLayoutInflater().inflate(resource, null);
MenuItemViewHolder viewHolder = new MenuItemViewHolder();
viewHolder.menuItemImageView = (ImageView)rowView.findViewById(R.id.menu_item_image_view);
viewHolder.menuItemTextView = (TextView)rowView.findViewById(R.id.menu_item_text_view);
rowView.setTag(viewHolder);
}
MenuItemViewHolder holder = (MenuItemViewHolder)rowView.getTag();
if(position == MenuActionItem.ITEM1.ordinal()) {
holder.menuItemImageView.setImageDrawable(activity.getDrawable(R.drawable.ic_megaphone));
holder.menuItemTextView.setText(activity.getResources().getString(R.string.item1));
}
else if(position == MenuActionItem.ITEM2.ordinal()) {
holder.menuItemImageView.setImageDrawable(activity.getDrawable(R.drawable.ic_calendar_page_empty));
holder.menuItemTextView.setText(activity.getResources().getString(R.string.item2));
}
else if(position == MenuActionItem.ITEM3.ordinal()) {
holder.menuItemImageView.setImageDrawable(activity.getDrawable(R.drawable.ic_chat_bubbles));
holder.menuItemTextView.setText(activity.getResources().getString(R.string.item3));
}
else if(position == MenuActionItem.ITEM4.ordinal()) {
holder.menuItemImageView.setImageDrawable(activity.getDrawable(R.drawable.ic_college_graduation));
holder.menuItemTextView.setText(activity.getResources().getString(R.string.item4));
}
else if(position == MenuActionItem.ITEM5.ordinal()) {
holder.menuItemImageView.setImageDrawable(activity.getDrawable(R.drawable.ic_trophy));
holder.menuItemTextView.setText(activity.getResources().getString(R.string.item5));
}
return rowView;
}
private static class MenuItemViewHolder {
public ImageView menuItemImageView;
public TextView menuItemTextView;
}
}
SNewsFragment.java (one of the fragment I wanted to link to)
package com.th.ac.sd;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import com.ng.anthony.mininavigationdrawer.R;
/**
* A simple {#link Fragment} subclass.
*/
public class SNewsFragment extends Fragment {
public SNewsFragment() {
// Required empty public constructor
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
return inflater.inflate(R.layout.fragment_snews, container, false);
}
}
activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent"
android:layout_height="match_parent" android:fitsSystemWindows="true"
tools:context="com.th.ac.sd.MainActivity">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<android.support.design.widget.AppBarLayout android:layout_height="wrap_content"
android:layout_width="match_parent" android:theme="#style/AppTheme.AppBarOverlay">
<android.support.v7.widget.Toolbar android:id="#+id/toolbar"
android:layout_width="match_parent" android:layout_height="?attr/actionBarSize"
android:background="?attr/colorPrimary" app:popupTheme="#style/AppTheme.PopupOverlay" />
</android.support.design.widget.AppBarLayout>
<include layout="#layout/content_main" />
</LinearLayout>
<android.support.design.widget.FloatingActionButton android:id="#+id/fab"
android:layout_width="wrap_content" android:layout_height="wrap_content"
android:layout_gravity="bottom|end" android:layout_margin="#dimen/fab_margin"
android:src="#android:drawable/ic_dialog_email" />
</android.support.design.widget.CoordinatorLayout>
content_main.xml
<?xml version="1.0" encoding="utf-8"?>
<android.support.v4.widget.SlidingPaneLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal"
android:id="#+id/layout_main">
<!--Master fragment-->
<fragment
android:name="com.th.ac.sd.MasterFragment"
android:layout_width="220dp"
android:layout_height="match_parent"
android:id="#+id/fragment_master">
</fragment>
<!--Detail layout -->
<FrameLayout
android:layout_width="1000dp"
android:layout_height="match_parent"
android:layout_weight="1"
android:layout_marginLeft="56dp">
</FrameLayout>
</android.support.v4.widget.SlidingPaneLayout>
fragment_master.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="match_parent">
<ListView
android:id="#android:id/list"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#android:color/darker_gray"
android:divider="#null">
</ListView>
</LinearLayout>
fragment_snews.xml (one of the fragment I wanted to link to)
<FrameLayout 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"
tools:context="com.th.ac.sd.SNewsFragment">
<!-- TODO: Update blank fragment layout -->
<TextView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:text="#string/hello_blank_fragment" />
</FrameLayout>
row_menu_action_item.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="horizontal" android:layout_width="match_parent"
android:layout_height="match_parent"
android:padding="16dp"
android:gravity="center_vertical">
<ImageView
android:id="#+id/menu_item_image_view"
android:layout_width="24dp"
android:layout_height="24dp"
android:layout_marginRight="16dp"/>
<TextView
android:id="#+id/menu_item_text_view"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="16sp"
android:textColor="#android:color/white"/>
</LinearLayout>
I don't know which file I should give so I give all the files in my project sorry
override onListItemClick() method from ListFragment on MasterFragment.java . Like
public class MasterFragment extends ListFragment {
public View onCreateView (LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_master, container);
setListAdapter(new MenuListAdapter(R.layout.row_menu_action_item, getActivity(), MenuActionItem.values()));
return view;
}
#Override
public void onListItemClick(ListView l, View v, int position, long id) {
super.onListItemClick(l, v, position, id);
if(position == 0){
SMSFragment smsFragment = new SMSFragment();
FragmentManager manager = getSupportFragmentManager();
manager.beginTransaction().replace(
R.id.layout_main,
smsFragment,
smsFragment.getTag()
).commit();
}
}
}
Because the class is somewhat old, and the IDE changed so much, i'm struggling a bit trying to do the same steps of the class.
I have created my Intent and i can send it by clicking on the ListView Item. Then it switches activities from the MainActivity to the DetailActivity. Yet when the DetailActivity is displayed (using DetailActivityFragment) the toolbar disappears. I compared XML's and made some improvements but now the toolbar isn't populated like the previous toolbar. The activity also "fills" the notification bar (the bar that extends to the drawer).
Question is, what am I doing wrong and what can i do to replicate the MainActivity toolbar to the new DetailActivity?
MainActivity.java
package com.example.diomonogatarilaptop.sunshine;
import android.os.Bundle;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.Snackbar;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.View;
import android.view.Menu;
import android.view.MenuItem;
public class MainActivity extends AppCompatActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
fab.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
Snackbar.make(view, "Something", Snackbar.LENGTH_LONG)
.setAction("Action", null).show();
}
});
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_main, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
if (id == R.id.action_refresh) {
MainActivityFragment.FetchWeatherTask weatherTask = new MainActivityFragment.FetchWeatherTask();
weatherTask.execute("Buraca");
return true;
}
return super.onOptionsItemSelected(item);
}
}
DetailActivity.java:
package com.example.diomonogatarilaptop.sunshine;
import android.content.Intent;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;
public class DetailActivity extends AppCompatActivity{
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_detail);
if (savedInstanceState == null) {
getSupportFragmentManager().beginTransaction()
.add(R.id.container_detail, new DetailActivityFragment())
.commit();
}
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar_detail);
setSupportActionBar(toolbar);
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.detail, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
public static class DetailActivityFragment extends Fragment {
TextView textView;
public DetailActivityFragment() {
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
Intent intent =getActivity().getIntent();
View rootView =inflater.inflate(R.layout.fragment_detail, container, false);
if(intent != null && intent.hasExtra(Intent.EXTRA_TEXT)) {
String forecastStr = intent.getStringExtra(Intent.EXTRA_TEXT);
textView= (TextView) rootView.findViewById((R.id.detail_text));
textView.setText(forecastStr);
}
return rootView;
}
}
}
Activity_detail.xml:
<android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="#+id/container_detail"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.example.android.sunshine.app.DetailActivity"
tools:ignore="MergeRootFrame">
<android.support.design.widget.AppBarLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:theme="#style/AppTheme.AppBarOverlay">
<android.support.v7.widget.Toolbar
android:id="#+id/toolbar_detail"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:background="?attr/colorPrimary"
app:popupTheme="#style/AppTheme.PopupOverlay" />
</android.support.design.widget.AppBarLayout>
<include layout="#layout/content_detail" />
<android.support.design.widget.FloatingActionButton
android:id="#+id/fab_detail"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="bottom|end"
android:layout_margin="#dimen/fab_margin"
android:src="#android:drawable/ic_dialog_email" />
</android.support.design.widget.CoordinatorLayout>
Content_detail.xml:
<fragment xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:id="#+id/fragment"
android:name="com.example.diomonogatarilaptop.sunshine.DetailActivity$DetailActivityFragment"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="#string/appbar_scrolling_view_behavior"
tools:layout="#layout/fragment_detail"
/>
Fragment_detail.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.diomonogatarilaptop.sunshine.DetailActivity$DetailActivityFragment"
tools:showIn="#layout/activity_detail">
<TextView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:text="New Text"
android:id="#+id/detail_text"
android:layout_alignParentTop="true"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true" />
</RelativeLayout>
Some ScreenCaptures from debugging on my mobile:
MainActivity
DetailActivity Where the bug happens
When I go into the view hierarchy it show RelativeLayout as the Viewgroup for the TextView and AnalogClock. So where did the fragment view go? Isn't the fragment contain the RelativeLayout, TextView, and AnalogClock in fragment_main.xml since it is the one that is inflated in MainActivity.java? Also, where did the TextView with "TestTest" as its text go?
Here's my code:
MainActivity:
package com.example.micha.solo;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
public class MainActivity extends AppCompatActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_main, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
}
MainActivityFragment:
package com.example.micha.solo;
import android.support.v4.app.Fragment;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
/**
* A placeholder fragment containing a simple view.
*/
public class MainActivityFragment extends Fragment {
public MainActivityFragment() {
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
return inflater.inflate(R.layout.fragment_main, container, false);
}
}
activity_main.xml:
<fragment xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools" android:id="#+id/fragment"
android:name="com.example.micha.solo.MainActivityFragment" tools:layout="#layout/fragment_main"
android:layout_width="match_parent" android:layout_height="match_parent"
tools:context=".MainActivity">
<TextView android:text="TestTest" android:layout_width="wrap_content"
android:layout_height="wrap_content" />
</fragment>
and fragment_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: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"
tools:showIn="#layout/activity_main">
<TextView android:text="#string/hello_world" android:layout_width="wrap_content"
android:layout_height="wrap_content" />
<AnalogClock
android:layout_width="100dp"
android:layout_height="100dp" />
</RelativeLayout>
I'm having an issue that I can't quite figure out. I've got all three of my buttons to take me to another activity, but the problem is that they all lead me to the activity that I only want my first (Easy) button to do.
fragment_main_menu.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.app.whosesloganisthat.MainMenu$PlaceholderFragment" >
<requestFocus />
<TextView
android:id="#+id/textView2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignTop="#+id/textView1"
android:layout_centerHorizontal="true"
android:text="#string/welcometowhosesloganisthat"
android:textAppearance="?android:attr/textAppearanceMedium" />
<Button
android:id="#+id/buttonHard"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_alignLeft="#+id/buttonHard"
android:layout_alignParentBottom="true"
android:layout_marginBottom="46dp"
android:onClick="sendMessage"
android:text="#string/hard" />
<Button
android:id="#+id/buttonEasy"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_alignLeft="#+id/textView2"
android:layout_below="#+id/textView2"
android:layout_marginTop="48dp"
android:onClick="sendMessage"
android:text="#string/easy" />
<Button
android:id="#+id/buttonIntermediate"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_alignLeft="#+id/buttonEasy"
android:layout_centerVertical="true"
android:onClick="sendMessage"
android:text="#string/intermediate" />
</RelativeLayout>
MainMenu.java:
package com.app.whosesloganisthat;
import android.support.v7.app.ActionBarActivity;
import android.support.v7.app.ActionBar;
import android.support.v4.app.Fragment;
import android.content.Intent;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.widget.EditText;
import android.os.Build;
public class MainMenu extends ActionBarActivity {
public final static String EXTRA_MESSAGE = "com.app.whosesloganisthat.MESSAGE";
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.fragment_main_menu); //xml file name which contains button
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main_menu, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
/** Called when the user clicks the Send button */
public void sendMessage(View view) {
Intent intent = new Intent(this, EasyLevelInfo.class);
startActivity(intent);
// Do something in response to button
}
/**
* A placeholder fragment containing a simple view.
*/
public static class PlaceholderFragment extends Fragment {
public PlaceholderFragment() {
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_main_menu,
container, false);
return rootView;
}
}
EasyLevelInfo.java:
package com.app.whosesloganisthat;
import android.support.v7.app.ActionBarActivity;
import android.support.v7.app.ActionBar;
import android.support.v4.app.Fragment;
import android.content.Intent;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;
import android.os.Build;
public class EasyLevelInfo extends ActionBarActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Intent intent = getIntent();
String message = intent.getStringExtra(MainMenu.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
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.easy_level_info, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
/**
* A placeholder fragment containing a simple view.
*/
public static class PlaceholderFragment extends Fragment {
public PlaceholderFragment() {
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_easy_level_info,
container, false);
return rootView;
}
}
fragment_easy_level_info.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.app.whosesloganisthat.EasyLevelInfo$PlaceholderFragment" >
<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="42dp"
android:text="#string/youhaveselectedeasy"
android:textAppearance="?android:attr/textAppearanceMedium" />
</RelativeLayout>
Thanks everyone!
Look in your fragment_main_menu.xml
layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignTop="#+id/textView1"
android:layout_centerHorizontal="true"
android:text="#string/welcometowhosesloganisthat"
android:textAppearance="?android:attr/textAppearanceMedium" />
<Button
android:id="#+id/buttonHard"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_alignLeft="#+id/buttonHard"
android:layout_alignParentBottom="true"
android:layout_marginBottom="46dp"
android:onClick="sendMessage"
android:text="#string/hard" />
<Button
android:id="#+id/buttonEasy"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_alignLeft="#+id/textView2"
android:layout_below="#+id/textView2"
android:layout_marginTop="48dp"
android:onClick="sendMessage"
android:text="#string/easy" />
<Button
android:id="#+id/buttonIntermediate"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_alignLeft="#+id/buttonEasy"
android:layout_centerVertical="true"
android:onClick="sendMessage"
android:text="#string/intermediate" />
You have three buttons buttonHard, buttonEasy , buttonIntermediate . And these three buttons have attribute android:onClick = "sendMessage" This means if one of these buttons is clicked do sendMessage method . Lets look on that method.
public void sendMessage(View view) {
Intent intent = new Intent(this, EasyLevelInfo.class);
startActivity(intent);
// Do something in response to button
}
This method starts Activity EasyLevelInfo . So if one of three buttons is clicked it will call this sendMessage method and open EasyLevelInfo Activity .
Hi i am beginner and i want to write simple on click event so i come up with these code in Android SDK and Eclipse :
package com.example.aplic;
import android.support.v7.app.ActionBarActivity;
import android.support.v4.app.Fragment;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.TextView;
public class MainActivity extends ActionBarActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Button b = (Button) findViewById(R.id.button1);
b.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
TextView tx = (TextView) findViewById(R.id.textView1);
tx.setText("yourtext");
}
});
if (savedInstanceState == null) {
getSupportFragmentManager().beginTransaction()
.add(R.id.container, new PlaceholderFragment())
.commit();
}
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
/**
* A placeholder fragment containing a simple view.
*/
public static class PlaceholderFragment extends Fragment {
public PlaceholderFragment() {
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_main, container, false);
return rootView;
}
}
}
and :
<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.aplic.MainActivity$PlaceholderFragment" >
<TextView
android:id="#+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/hello_world" />
<Button
android:id="#+id/button1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="#+id/textView1"
android:layout_marginTop="110dp"
android:layout_toRightOf="#+id/textView1" />
<ImageView
android:id="#+id/imageView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="#+id/button1"
android:layout_below="#+id/button1"
android:layout_marginTop="96dp"
android:contentDescription="#string/abc_action_mode_done"
android:src="#drawable/abc_ab_bottom_solid_dark_holo" />
</RelativeLayout>
The problem is when i launch the code on emulator it hang and reset and when i launch it in the real device , it close the program, I dont know what is wrong with it , do i use wrong event ?
PS: When i delete the onclick event part, it works fine but it don't react on the click.
activity_main.xml :
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="#+id/container"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.example.deomanapp.MainActivity"
tools:ignore="MergeRootFrame" />
It looks like the button belongs to fragment_main.xml.
From your comment
The name is fragment_main.xml
Its not hanging. Its a crash. You are probably getting NullPointerException.
Change to
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
final View rootView = inflater.inflate(R.layout.fragment_main, container, false);
Button b = (Button) rootView.findViewById(R.id.button1);
b.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
TextView tx = (TextView) rootview.findViewById(R.id.textView1);
tx.setText("yourtext");
}
});
return rootView;
}