Engin
- Forum-Beiträge: 16
02.04.2014, 20:50:22 via Website
02.04.2014 20:50:22 via Website
Wenn ich neue Activity starten will bekomme ich einen Fehlermeldung und der App wird gestoppt. 'App wird angehalten'
MainActivity.java
activity_main.xml
DisplayMessage.java
Manifest
MainActivity.java
1package com.example.myfirstapp;
2
3import android.content.Intent;
4import android.os.Bundle;
5import android.support.v4.app.Fragment;
6import android.support.v7.app.ActionBarActivity;
7import android.view.LayoutInflater;
8import android.view.Menu;
9import android.view.MenuItem;
10import android.view.View;
11import android.view.ViewGroup;
12import android.widget.EditText;
13
14public class MainActivity extends ActionBarActivity {
15
16 public final static String EXTRA_MSG = "com.example.myfirstapp.MESSAGE";
17
18 @Override
19 protected void onCreate(Bundle savedInstanceState) {
20 super.onCreate(savedInstanceState);
21 setContentView(R.layout.activity_main);
22
23 if (savedInstanceState == null) {
24 getSupportFragmentManager().beginTransaction()
25 .add(R.id.container, new PlaceholderFragment())
26 .commit();
27 }
28 }
29
30 public void sendMessage(View view) {
31 Intent intent = new Intent(this, DisplayMessage.class);
32 EditText editText = (EditText) findViewById(R.id.editText1);
33 String message = editText.getText().toString();
34 intent.putExtra(EXTRA_MSG, message);
35 startActivity(intent);
36 }
37
38
39 @Override
40 public boolean onCreateOptionsMenu(Menu menu) {
41
42 // Inflate the menu; this adds items to the action bar if it is present.
43 getMenuInflater().inflate(R.menu.main, menu);
44 return true;
45 }
46
47 @Override
48 public boolean onOptionsItemSelected(MenuItem item) {
49 // Handle action bar item clicks here. The action bar will
50 // automatically handle clicks on the Home/Up button, so long
51 // as you specify a parent activity in AndroidManifest.xml.
52 int id = item.getItemId();
53 if (id == R.id.action_settings) {
54 return true;
55 }
56 return super.onOptionsItemSelected(item);
57 }
58
59 /**
60 * A placeholder fragment containing a simple view.
61 */
62 public static class PlaceholderFragment extends Fragment {
63
64 public PlaceholderFragment() {
65 }
66
67 @Override
68 public View onCreateView(LayoutInflater inflater, ViewGroup container,
69 Bundle savedInstanceState) {
70 View rootView = inflater.inflate(R.layout.fragment_main, container, false);
71 return rootView;
72 }
73 }
74
75}
2
3import android.content.Intent;
4import android.os.Bundle;
5import android.support.v4.app.Fragment;
6import android.support.v7.app.ActionBarActivity;
7import android.view.LayoutInflater;
8import android.view.Menu;
9import android.view.MenuItem;
10import android.view.View;
11import android.view.ViewGroup;
12import android.widget.EditText;
13
14public class MainActivity extends ActionBarActivity {
15
16 public final static String EXTRA_MSG = "com.example.myfirstapp.MESSAGE";
17
18 @Override
19 protected void onCreate(Bundle savedInstanceState) {
20 super.onCreate(savedInstanceState);
21 setContentView(R.layout.activity_main);
22
23 if (savedInstanceState == null) {
24 getSupportFragmentManager().beginTransaction()
25 .add(R.id.container, new PlaceholderFragment())
26 .commit();
27 }
28 }
29
30 public void sendMessage(View view) {
31 Intent intent = new Intent(this, DisplayMessage.class);
32 EditText editText = (EditText) findViewById(R.id.editText1);
33 String message = editText.getText().toString();
34 intent.putExtra(EXTRA_MSG, message);
35 startActivity(intent);
36 }
37
38
39 @Override
40 public boolean onCreateOptionsMenu(Menu menu) {
41
42 // Inflate the menu; this adds items to the action bar if it is present.
43 getMenuInflater().inflate(R.menu.main, menu);
44 return true;
45 }
46
47 @Override
48 public boolean onOptionsItemSelected(MenuItem item) {
49 // Handle action bar item clicks here. The action bar will
50 // automatically handle clicks on the Home/Up button, so long
51 // as you specify a parent activity in AndroidManifest.xml.
52 int id = item.getItemId();
53 if (id == R.id.action_settings) {
54 return true;
55 }
56 return super.onOptionsItemSelected(item);
57 }
58
59 /**
60 * A placeholder fragment containing a simple view.
61 */
62 public static class PlaceholderFragment extends Fragment {
63
64 public PlaceholderFragment() {
65 }
66
67 @Override
68 public View onCreateView(LayoutInflater inflater, ViewGroup container,
69 Bundle savedInstanceState) {
70 View rootView = inflater.inflate(R.layout.fragment_main, container, false);
71 return rootView;
72 }
73 }
74
75}
activity_main.xml
1<FrameLayout xmlns:android="XXX"
2 xmlns:tools="XXX"
3 android:id="@+id/container"
4 android:layout_width="match_parent"
5 android:layout_height="match_parent"
6 tools:context="com.example.myfirstapp.MainActivity"
7 tools:ignore="MergeRootFrame" >
8
9
10 <LinearLayout
11 android:layout_width="match_parent"
12 android:layout_height="match_parent"
13 android:orientation="horizontal" >
14
15 <EditText
16 android:id="@+id/editText1"
17 android:layout_weight="1"
18 android:layout_width="0dp"
19 android:layout_height="wrap_content"
20 android:hint="@string/your_text" >
21
22 </EditText>
23
24 <Button
25 android:id="@+id/button1"
26 android:layout_width="wrap_content"
27 android:layout_height="wrap_content"
28 android:text="@string/button_send"
29 android:onClick="sendMessage" />
30
31 </LinearLayout>
32
33</FrameLayout>
2 xmlns:tools="XXX"
3 android:id="@+id/container"
4 android:layout_width="match_parent"
5 android:layout_height="match_parent"
6 tools:context="com.example.myfirstapp.MainActivity"
7 tools:ignore="MergeRootFrame" >
8
9
10 <LinearLayout
11 android:layout_width="match_parent"
12 android:layout_height="match_parent"
13 android:orientation="horizontal" >
14
15 <EditText
16 android:id="@+id/editText1"
17 android:layout_weight="1"
18 android:layout_width="0dp"
19 android:layout_height="wrap_content"
20 android:hint="@string/your_text" >
21
22 </EditText>
23
24 <Button
25 android:id="@+id/button1"
26 android:layout_width="wrap_content"
27 android:layout_height="wrap_content"
28 android:text="@string/button_send"
29 android:onClick="sendMessage" />
30
31 </LinearLayout>
32
33</FrameLayout>
DisplayMessage.java
1package com.example.myfirstapp;
2
3import android.support.v7.app.ActionBarActivity;
4import android.support.v7.app.ActionBar;
5import android.support.v4.app.Fragment;
6import android.content.Intent;
7import android.os.Bundle;
8import android.view.LayoutInflater;
9import android.view.Menu;
10import android.view.MenuItem;
11import android.view.View;
12import android.view.ViewGroup;
13import android.widget.TextView;
14import android.os.Build;
15
16public class DisplayMessage extends ActionBarActivity {
17
18 @Override
19 protected void onCreate(Bundle savedInstanceState) {
20 super.onCreate(savedInstanceState);
21 setContentView(R.layout.fragment_display_message);
22
23 Intent intent = getIntent();
24 String message = intent.getStringExtra(MainActivity.EXTRA_MSG);
25
26 TextView textView = new TextView(this);
27 textView.setTextSize(40);
28 textView.setText(message);
29
30 setContentView(textView);
31
32 if (savedInstanceState == null) {
33 getSupportFragmentManager().beginTransaction()
34 .add(R.id.container, new PlaceholderFragment()).commit();
35 }
36 }
37
38 @Override
39 public boolean onCreateOptionsMenu(Menu menu) {
40
41 // Inflate the menu; this adds items to the action bar if it is present.
42 getMenuInflater().inflate(R.menu.display_message, menu);
43 return true;
44 }
45
46 @Override
47 public boolean onOptionsItemSelected(MenuItem item) {
48 // Handle action bar item clicks here. The action bar will
49 // automatically handle clicks on the Home/Up button, so long
50 // as you specify a parent activity in AndroidManifest.xml.
51 int id = item.getItemId();
52 if (id == R.id.action_settings) {
53 return true;
54 }
55 return super.onOptionsItemSelected(item);
56 }
57
58 /**
59 * A placeholder fragment containing a simple view.
60 */
61 public static class PlaceholderFragment extends Fragment {
62
63 public PlaceholderFragment() {
64 }
65
66 @Override
67 public View onCreateView(LayoutInflater inflater, ViewGroup container,
68 Bundle savedInstanceState) {
69 View rootView = inflater.inflate(R.layout.fragment_display_message,
70 container, false);
71 return rootView;
72 }
73 }
74
75}
2
3import android.support.v7.app.ActionBarActivity;
4import android.support.v7.app.ActionBar;
5import android.support.v4.app.Fragment;
6import android.content.Intent;
7import android.os.Bundle;
8import android.view.LayoutInflater;
9import android.view.Menu;
10import android.view.MenuItem;
11import android.view.View;
12import android.view.ViewGroup;
13import android.widget.TextView;
14import android.os.Build;
15
16public class DisplayMessage extends ActionBarActivity {
17
18 @Override
19 protected void onCreate(Bundle savedInstanceState) {
20 super.onCreate(savedInstanceState);
21 setContentView(R.layout.fragment_display_message);
22
23 Intent intent = getIntent();
24 String message = intent.getStringExtra(MainActivity.EXTRA_MSG);
25
26 TextView textView = new TextView(this);
27 textView.setTextSize(40);
28 textView.setText(message);
29
30 setContentView(textView);
31
32 if (savedInstanceState == null) {
33 getSupportFragmentManager().beginTransaction()
34 .add(R.id.container, new PlaceholderFragment()).commit();
35 }
36 }
37
38 @Override
39 public boolean onCreateOptionsMenu(Menu menu) {
40
41 // Inflate the menu; this adds items to the action bar if it is present.
42 getMenuInflater().inflate(R.menu.display_message, menu);
43 return true;
44 }
45
46 @Override
47 public boolean onOptionsItemSelected(MenuItem item) {
48 // Handle action bar item clicks here. The action bar will
49 // automatically handle clicks on the Home/Up button, so long
50 // as you specify a parent activity in AndroidManifest.xml.
51 int id = item.getItemId();
52 if (id == R.id.action_settings) {
53 return true;
54 }
55 return super.onOptionsItemSelected(item);
56 }
57
58 /**
59 * A placeholder fragment containing a simple view.
60 */
61 public static class PlaceholderFragment extends Fragment {
62
63 public PlaceholderFragment() {
64 }
65
66 @Override
67 public View onCreateView(LayoutInflater inflater, ViewGroup container,
68 Bundle savedInstanceState) {
69 View rootView = inflater.inflate(R.layout.fragment_display_message,
70 container, false);
71 return rootView;
72 }
73 }
74
75}
Manifest
1<?xml version="1.0" encoding="utf-8"?>
2<manifest xmlns:android="XXX"
3 package="com.example.myfirstapp"
4 android:versionCode="1"
5 android:versionName="1.0" >
6
7 <uses-sdk
8 android:minSdkVersion="8"
9 android:targetSdkVersion="19" />
10
11 <application
12 android:allowBackup="true"
13 android:icon="@drawable/ic_launcher"
14 android:label="@string/app_name"
15 android:theme="@style/AppTheme" >
16 <activity
17 android:name="com.example.myfirstapp.MainActivity"
18 android:label="@string/app_name" >
19 <intent-filter>
20 <action android:name="android.intent.action.MAIN" />
21
22 <category android:name="android.intent.category.LAUNCHER" />
23 </intent-filter>
24 </activity>
25 <activity
26 android:name="com.example.myfirstapp.DisplayMessage"
27 android:label="@string/title_activity_display_message"
28 android:parentActivityName="com.example.myfirstapp.MainActivity" >
29 <meta-data
30 android:name="android.support.PARENT_ACTIVITY"
31 android:value="com.example.myfirstapp.MainActivity" />
32 </activity>
33 </application>
34
35</manifest>
2<manifest xmlns:android="XXX"
3 package="com.example.myfirstapp"
4 android:versionCode="1"
5 android:versionName="1.0" >
6
7 <uses-sdk
8 android:minSdkVersion="8"
9 android:targetSdkVersion="19" />
10
11 <application
12 android:allowBackup="true"
13 android:icon="@drawable/ic_launcher"
14 android:label="@string/app_name"
15 android:theme="@style/AppTheme" >
16 <activity
17 android:name="com.example.myfirstapp.MainActivity"
18 android:label="@string/app_name" >
19 <intent-filter>
20 <action android:name="android.intent.action.MAIN" />
21
22 <category android:name="android.intent.category.LAUNCHER" />
23 </intent-filter>
24 </activity>
25 <activity
26 android:name="com.example.myfirstapp.DisplayMessage"
27 android:label="@string/title_activity_display_message"
28 android:parentActivityName="com.example.myfirstapp.MainActivity" >
29 <meta-data
30 android:name="android.support.PARENT_ACTIVITY"
31 android:value="com.example.myfirstapp.MainActivity" />
32 </activity>
33 </application>
34
35</manifest>
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