Kein Blick für id gefunden ... für Fragment PlaceholderFragment

? Andres Perez @ | Original: StackOverFlow
---

Ich habe eine einfache Anwendung (basierend auf http://developer.android.com/training/basics/firstapp/starting-activity.html ); das einzige, was sie tut, ist zeigen eine EditText und einen Knopf. Der Button erstellt eine andere Tätigkeit, und zeigen die EditText Nachricht ... einfach! ... Aber wenn auf dem Emulator läuft, schließt die App, wenn ich auf die Schaltfläche klicken und ich bekomme diese Fehlermeldung:

"Nein Blick für id 0x7f05003c gefunden ( com.example.testapp : id / Container) für Fragment PlaceholderFragment { 4173ead8 # 0 id = 0x7f05003c }"

MainActivity.java

public class MainActivity extends ActionBarActivity {

public final static String EXTRA_MESSAGE = "com.example.testapp.MESSAGE";

public void SendMessage (View view) {
    Intent intent = new Intent(this, DisplayMessageActivity.class);
    EditText editText = (EditText) findViewById(R.id.edt_message);
    String message = editText.getText().toString();
    intent.putExtra(EXTRA_MESSAGE, message);
    startActivity(intent);
}

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    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;
    }
}
}

activity_layout.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.testapp.MainActivity"
tools:ignore="MergeRootFrame" />

fragment_main.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="horizontal" >

<EditText 
    android:id="@+id/edt_message"
    android:layout_weight="1"
    android:layout_width="0dp"
    android:layout_height="wrap_content"
    android:hint="@string/Message" />

<Button
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="@string/textButtom"
    android:onClick="SendMessage" />
</LinearLayout>

DisplayMessageActivity.java

public class DisplayMessageActivity extends ActionBarActivity {

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_display_message);

    if (savedInstanceState == null) {
        getSupportFragmentManager().beginTransaction()
                .add(R.id.container, new PlaceholderFragment()).commit();
    }

    Intent intent = getIntent();
    String message = intent.getStringExtra(MainActivity.EXTRA_MESSAGE);

    TextView textView = new TextView(this);
    textView.setTextSize (40);
    textView.setText (message);

    setContentView (textView);
}

@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_display_message,
                container, false);
        return rootView;
    }
}

}

activity_display_message.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.testapp.DisplayMessageActivity"
tools:ignore="MergeRootFrame" />

fragment_display_message.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" >

</RelativeLayout>

AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.testapp"
android:versionCode="1"
android:versionName="1.0" >

<uses-sdk
    android:minSdkVersion="10"
    android:targetSdkVersion="18" />

<application
    android:allowBackup="true"
    android:icon="@drawable/ic_launcher"
    android:label="@string/app_name"
    android:theme="@style/AppTheme" >
    <activity
        android:name="com.example.testapp.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.example.testapp.DisplayMessageActivity"
        android:label="@string/title_activity_display_message"
        android:parentActivityName="com.example.testapp.MainActivity" >
        <meta-data
            android:name="android.support.PARENT_ACTIVITY"
            android:value="com.example.testapp.MainActivity" />
    </activity>
</application>

</manifest>

LogCat

> 03-22 11:02:42.755: E/AndroidRuntime(1722):FATAL EXCEPTION: main 03-22
> 11:02:42.755: E/AndroidRuntime(1722):java.lang.RuntimeException:
> Unable to start activity ComponentInfo{com.example.testapp/           
> com.example.testapp.DisplayMessageActivity}:java.lang.IllegalArgumentException:
> No view found for id 0x7f05003c (com.example.testapp:id/container) for
> fragment PlaceholderFragment{417356c8 #0 id=0x7f05003c} 03-22
> 11:02:42.755: E/AndroidRuntime(1722):at
> android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2211)
> 03-22 11:02:42.755: E/AndroidRuntime(1722):at
> android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2261)
> 03-22 11:02:42.755: E/AndroidRuntime(1722):at
> android.app.ActivityThread.access$600(ActivityThread.java:141) 03-22
> 11:02:42.755: E/AndroidRuntime(1722):at
> android.app.ActivityThread$H.handleMessage(ActivityThread.java:1256)
> 03-22 11:02:42.755: E/AndroidRuntime(1722):at
> android.os.Handler.dispatchMessage(Handler.java:99) 03-22
> 11:02:42.755: E/AndroidRuntime(1722):at
> android.os.Looper.loop(Looper.java:137) 03-22 11:02:42.755:
> E/AndroidRuntime(1722):at
> android.app.ActivityThread.main(ActivityThread.java:5103) 03-22
> 11:02:42.755: E/AndroidRuntime(1722):at
> java.lang.reflect.Method.invokeNative(Native Method) 03-22
> 11:02:42.755: E/AndroidRuntime(1722):at
> java.lang.reflect.Method.invoke(Method.java:525) 03-22 11:02:42.755:
> E/AndroidRuntime(1722):at
> com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:737)
> 03-22 11:02:42.755: E/AndroidRuntime(1722):at
> com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553) 03-22
> 11:02:42.755: E/AndroidRuntime(1722):at
> dalvik.system.NativeStart.main(Native Method) 03-22 11:02:42.755:
> E/AndroidRuntime(1722):Caused by: java.lang.IllegalArgumentException:
> No view found for id 0x7f05003c (com.example.testapp:id/container) for
> fragment PlaceholderFragment{417356c8 #0 id=0x7f05003c} 03-22
> 11:02:42.755: E/AndroidRuntime(1722):at
> android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:919)
> 03-22 11:02:42.755: E/AndroidRuntime(1722):at
> android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1104)
> 03-22 11:02:42.755: E/AndroidRuntime(1722):at
> android.support.v4.app.BackStackRecord.run(BackStackRecord.java:682)
> 03-22 11:02:42.755: E/AndroidRuntime(1722):at
> android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1467)
> 03-22 11:02:42.755: E/AndroidRuntime(1722):at
> android.support.v4.app.FragmentActivity.onStart(FragmentActivity.java:570)
> 03-22 11:02:42.755: E/AndroidRuntime(1722):at
> android.app.Instrumentation.callActivityOnStart(Instrumentation.java:1171)
> 03-22 11:02:42.755: E/AndroidRuntime(1722):at
> android.app.Activity.performStart(Activity.java:5143) 03-22
> 11:02:42.755: E/AndroidRuntime(1722):at
> android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2184)
> 03-22 11:02:42.755: E/AndroidRuntime(1722):... 11 more 03-22
> 11:02:42.965: D/dalvikvm(1722): GC_FOR_ALLOC freed 206K, 9% free
> 2808K/3076K, paused 54ms, total 92ms 03-22 11:02:44.764:
> I/Process(1722): Sending signal. PID: 1722 SIG: 9
---

Top 5 Antwort

1Libin @

Crash ist auf setContentView ( Textview ); in DisplayMessageActivity . Wenn Ihr versucht to display only the message Sie durch den Vorsatz übergeben, dann wird Ihr direkt stellen Sie die Textview als Inhalt zum Detail Aktivität. Ändern Sie den DetailMessageActivity onCreate, wie nachstehend Code ...

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    Intent intent = getIntent();
    String message = intent.getStringExtra(MainActivity.EXTRA_MESSAGE);

    TextView textView = new TextView(this);
    textView.setTextSize (40);
    textView.setText (message);

    setContentView (textView);
}

Auch ein weiteres Problem, ändern Sie die " MainActivity ' setContentView ( R.layout.activity_layout );

2Minx @

Was funktioniert, ist, löschen Sie diese :

if (savedInstanceState == null) {
        getSupportFragmentManager().beginTransaction()
                .add(R.id.container, new PlaceholderFragment()).commit();
    }

( Löschen Sie diesen aus onCreate Verfahren der DisplayMessageActivity ist )

3bklynjones @
if (savedInstanceState == null) {
        getSupportFragmentManager().beginTransaction()
            .add(R.id.container, new PlaceholderFragment()).commit();
    }

Löschen der vorherigen if-Anweisung hat bei mir auch.