我按照官方Android教程，从第一页到starting acivity page
结束当我尝试在文本框中写一些内容时，Android应用程序崩溃了。 下面是logcat
08-26 17:02:22.560: I/Process(22730): Sending signal. PID: 22730 SIG: 9
08-26 17:02:22.740: D/ActivityThread(22775): handleBindApplication:com.example.andtest
08-26 17:02:22.740: D/ActivityThread(22775): setTargetHeapUtilization:0.25
08-26 17:02:22.740: D/ActivityThread(22775): setTargetHeapMinFree:524288
08-26 17:02:22.981: I/Adreno200-EGL(22775): <qeglDrvAPI_eglInitialize:269>: EGL 1.4 QUALCOMM build: AU_LINUX_ANDROID_JB_VANILLA.04.02.02.60.051_msm8960_JB_VANILLA_CL2997615_release_AU (CL2997615)
08-26 17:02:22.981: I/Adreno200-EGL(22775): Build Date: 04/11/13 Thu
08-26 17:02:22.981: I/Adreno200-EGL(22775): Local Branch:
08-26 17:02:22.981: I/Adreno200-EGL(22775): Remote Branch: quic/mako_jb_mr1
08-26 17:02:22.981: I/Adreno200-EGL(22775): Local Patches: NONE
08-26 17:02:22.981: I/Adreno200-EGL(22775): Reconstruct Branch: AU_LINUX_ANDROID_JB_VANILLA.04.02.02.60.051 + NOTHING
08-26 17:02:23.011: D/OpenGLRenderer(22775): Enabling debug mode 0
08-26 17:02:23.331: I/Timeline(22775): Timeline: Activity_idle id: android.os.BinderProxy@41a0a008 time:120759433
08-26 17:02:25.063: I/Timeline(22775): Timeline: Activity_launch_request id:com.example.andtest time:120761161
08-26 17:02:25.143: E/FragmentManager(22775): No view found for id 0x7f080000 (com.example.andtest:id/container) for fragment PlaceholderFragment{41a2e990 #0 id=0x7f080000}
08-26 17:02:25.143: E/FragmentManager(22775): Activity state:
08-26 17:02:25.153: E/FragmentManager(22775): Local Activity 41a03f88 State:
08-26 17:02:25.163: E/FragmentManager(22775): mResumed=false mStopped=false mFinished=false
08-26 17:02:25.163: E/FragmentManager(22775): mLoadersStarted=false
08-26 17:02:25.163: E/FragmentManager(22775): mChangingConfigurations=false
08-26 17:02:25.163: E/FragmentManager(22775): mCurrentConfig={1.0 222mcc88mnc it_IT ldltr sw320dp w320dp h508dp 240dpi nrml long port finger -keyb/v/h -nav/h s.21 themeResource=null}
08-26 17:02:25.163: E/FragmentManager(22775): Active Fragments in 41a04080:
08-26 17:02:25.163: E/FragmentManager(22775): #0: PlaceholderFragment{41a2e990 #0 id=0x7f080000}
08-26 17:02:25.163: E/FragmentManager(22775): mFragmentId=#7f080000 mContainerId=#7f080000 mTag=null
08-26 17:02:25.163: E/FragmentManager(22775): mState=0 mIndex=0 mWho=android:fragment:0 mBackStackNesting=0
08-26 17:02:25.163: E/FragmentManager(22775): mAdded=true mRemoving=false mResumed=false mFromLayout=false mInLayout=false
08-26 17:02:25.163: E/FragmentManager(22775): mHidden=false mDetached=false mMenuVisible=true mHasMenu=false
08-26 17:02:25.163: E/FragmentManager(22775): mRetainInstance=false mRetaining=false mUserVisibleHint=true
08-26 17:02:25.163: E/FragmentManager(22775): mFragmentManager=FragmentManager{41a04080 in DisplayMessageActivity{41a03f88}}
08-26 17:02:25.163: E/FragmentManager(22775): mActivity=com.example.andtest.DisplayMessageActivity@41a03f88
08-26 17:02:25.163: E/FragmentManager(22775): Added Fragments:
08-26 17:02:25.163: E/FragmentManager(22775): #0: PlaceholderFragment{41a2e990 #0 id=0x7f080000}
08-26 17:02:25.163: E/FragmentManager(22775): FragmentManager misc state:
08-26 17:02:25.163: E/FragmentManager(22775): mActivity=
08-26 17:02:25.173: E/FragmentManager(22775): com.example.andtest.DisplayMessageActivity@41a03f88
08-26 17:02:25.173: E/FragmentManager(22775): mContainer=android.app.Activity$1@41a0bb90
08-26 17:02:25.173: E/FragmentManager(22775): mCurState=2 mStateSaved=false mDestroyed=false
08-26 17:02:25.173: E/FragmentManager(22775): Looper (main, tid 1) {41a088c0}
08-26 17:02:25.173: E/FragmentManager(22775): (Total messages: 0, idling=false, quitting=false)
08-26 17:02:25.173: D/AndroidRuntime(22775): Shutting down VM
08-26 17:02:25.173: W/dalvikvm(22775): threadid=1: thread exiting with uncaught exception (group=0x41746ce0)
08-26 17:02:25.183: E/AndroidRuntime(22775): FATAL EXCEPTION: main
08-26 17:02:25.183: E/AndroidRuntime(22775): Process: com.example.andtest, PID: 22775
08-26 17:02:25.183: E/AndroidRuntime(22775): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.andtest/com.example.andtest.DisplayMessageActivity}: java.lang.IllegalArgumentException: No view found for id 0x7f080000 (com.example.andtest:id/container) for fragment PlaceholderFragment{41a2e990 #0 id=0x7f080000}
08-26 17:02:25.183: E/AndroidRuntime(22775): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2213)
08-26 17:02:25.183: E/AndroidRuntime(22775): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2262)
08-26 17:02:25.183: E/AndroidRuntime(22775): at android.app.ActivityThread.access$800(ActivityThread.java:145)
08-26 17:02:25.183: E/AndroidRuntime(22775): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1206)
08-26 17:02:25.183: E/AndroidRuntime(22775): at android.os.Handler.dispatchMessage(Handler.java:102)
08-26 17:02:25.183: E/AndroidRuntime(22775): at android.os.Looper.loop(Looper.java:136)
08-26 17:02:25.183: E/AndroidRuntime(22775): at android.app.ActivityThread.main(ActivityThread.java:5137)
08-26 17:02:25.183: E/AndroidRuntime(22775): at java.lang.reflect.Method.invokeNative(Native Method)
08-26 17:02:25.183: E/AndroidRuntime(22775): at java.lang.reflect.Method.invoke(Method.java:515)
08-26 17:02:25.183: E/AndroidRuntime(22775): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:795)
08-26 17:02:25.183: E/AndroidRuntime(22775): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:611)
08-26 17:02:25.183: E/AndroidRuntime(22775): at dalvik.system.NativeStart.main(Native Method)
08-26 17:02:25.183: E/AndroidRuntime(22775): Caused by: java.lang.IllegalArgumentException: No view found for id 0x7f080000 (com.example.andtest:id/container) for fragment PlaceholderFragment{41a2e990 #0 id=0x7f080000}
08-26 17:02:25.183: E/AndroidRuntime(22775): at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:882)
08-26 17:02:25.183: E/AndroidRuntime(22775): at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:1062)
08-26 17:02:25.183: E/AndroidRuntime(22775): at android.app.BackStackRecord.run(BackStackRecord.java:684)
08-26 17:02:25.183: E/AndroidRuntime(22775): at android.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1447)
08-26 17:02:25.183: E/AndroidRuntime(22775): at android.app.Activity.performStart(Activity.java:5240)
08-26 17:02:25.183: E/AndroidRuntime(22775): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2176)
08-26 17:02:25.183: E/AndroidRuntime(22775): ... 11 more
08-26 17:02:26.834: I/Process(22775): Sending signal. PID: 22775 SIG: 9
MainActivity.java
package com.example.andtest;
import android.app.Activity;
import android.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;
public class MainActivity extends Activity
{
public final static String EXTRA_MESSAGE = "com.example.myfirstapp.MESSAGE";
@Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
if (savedInstanceState == null)
{
getFragmentManager().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;
}
}
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);
}
}
DisplayMessageActivity.java
package com.example.andtest;
import android.app.Activity;
import android.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;
public class DisplayMessageActivity extends Activity
{
@Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_display_message);
if (savedInstanceState == null)
{
getFragmentManager().beginTransaction()
.add(R.id.container, new PlaceholderFragment()).commit();
}
Intent intent = getIntent();
String message = intent.getStringExtra(MainActivity.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);
}
@Override
public boolean onCreateOptionsMenu(Menu menu)
{
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.display_message, 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_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.andtest.DisplayMessageActivity"
tools:ignore="MergeRootFrame" />
activity_main.xml中
<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.andtest.MainActivity"
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"
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.andtest.DisplayMessageActivity$PlaceholderFragment" >
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/hello_world" />
</RelativeLayout>
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:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
android:orientation="horizontal"
tools:context="com.example.andtest.MainActivity$PlaceholderFragment" >
<EditText android:id="@+id/edit_message"
android:layout_weight="1"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:hint="@string/edit_message"
android:onClick="sendMessage" />
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/button_send" />
</LinearLayout>
的AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.andtest"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="14"
android:targetSdkVersion="21" />
<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=".DisplayMessageActivity"
android:label="@string/title_activity_display_message"
android:parentActivityName=".MainActivity" >
<meta-data
android:name="android.support.PARENT_ACTIVITY"
android:value="com.example.andtest.MainActivity" />
</activity>
</application>
</manifest>
的strings.xml
<?xml version="1.0" encoding="utf-8"?>
<resources>
<string name="app_name">AndTest</string>
<string name="hello_world">Hello world!</string>
<string name="action_settings">Settings</string>
<string name="edit_message">Enter a message</string>
<string name="button_send">Send</string>
<string name="title_activity_main">MainActivity</string>
<string name="title_activity_display_message">My Message</string>
</resources>
系统详情：
答案 0 :(得分：2)
首先我发布了一个错误的解决方案。对不起。这是出了什么问题：
在你的DisplayMessageActivity中，你要两次致电setContentView(...)。使用activity_display_message布局后，第二次使用 contaider-id 设置textView替换 activity_display_message-layout 。所以删除PlaceholderFragment的东西，一切都很好（它也不是教程的一部分）。
当FragmentManager尝试在容器中添加PlaceholderFragment时，它意识到布局中没有ID为container的视图。那是因为布局（activity_display_message）已被TextView取代
（好像Fragment事务确实运行异步）
答案 1 :(得分：1)
activity_display_message和activity_main布局都具有相同的ID：@+id/container，因此Android不会选择哪一个并抛出错误。
答案 2 :(得分：0)
//将文本视图设置为活动布局
setContentView(textView); // this is mistake, dont call setContentView twice, this is sin.