我目前正在浏览Android Developer教程，并且是最基本的教程，它将意图从一个活动传递到另一个活动并显示结果。
Eclipse显示应用程序没有错误，一切正常（不起作用），直到我插入这些代码行：
// Get the message from the intent
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);
我正在查看LogCat并设法解决了一个错误，我只是错误地命名了一些错误，但现在又被我难倒了。这是我当前的LogCat输出：
10-09 18:09:03.882: D/Send Message Button(9652): Pressed
10-09 18:09:03.917: E/FragmentManager(9652): No view found for id 0x7f05003c (com.example.myfirstapp:id/container) for fragment PlaceholderFragment{422e3888 #0 id=0x7f05003c}
10-09 18:09:03.917: E/FragmentManager(9652): Activity state:
10-09 18:09:03.917: D/FragmentManager(9652): Local FragmentActivity 422d1598 State:
10-09 18:09:03.922: D/FragmentManager(9652): mCreated=truemResumed=false mStopped=false mReallyStopped=false
10-09 18:09:03.922: D/FragmentManager(9652): mLoadersStarted=false
10-09 18:09:03.922: D/FragmentManager(9652): Active Fragments in 422d1808:
10-09 18:09:03.922: D/FragmentManager(9652): #0: PlaceholderFragment{422e3888 #0 id=0x7f05003c}
10-09 18:09:03.922: D/FragmentManager(9652): mFragmentId=#7f05003c mContainerId=#7f05003c mTag=null
10-09 18:09:03.922: D/FragmentManager(9652): mState=0 mIndex=0 mWho=android:fragment:0 mBackStackNesting=0
10-09 18:09:03.927: D/FragmentManager(9652): mAdded=true mRemoving=false mResumed=false mFromLayout=false mInLayout=false
10-09 18:09:03.927: D/FragmentManager(9652): mHidden=false mDetached=false mMenuVisible=true mHasMenu=false
10-09 18:09:03.927: D/FragmentManager(9652): mRetainInstance=false mRetaining=false mUserVisibleHint=true
10-09 18:09:03.927: D/FragmentManager(9652): mFragmentManager=FragmentManager{422d1808 in DisplayMessageActivity{422d1598}}
10-09 18:09:03.927: D/FragmentManager(9652): mActivity=com.example.myfirstapp.DisplayMessageActivity@422d1598
10-09 18:09:03.927: D/FragmentManager(9652): Added Fragments:
10-09 18:09:03.927: D/FragmentManager(9652): #0: PlaceholderFragment{422e3888 #0 id=0x7f05003c}
10-09 18:09:03.927: D/FragmentManager(9652): FragmentManager misc state:
10-09 18:09:03.927: D/FragmentManager(9652): mActivity=com.example.myfirstapp.DisplayMessageActivity@422d1598
10-09 18:09:03.927: D/FragmentManager(9652): mContainer=android.support.v4.app.FragmentActivity$2@422d1880
10-09 18:09:03.927: D/FragmentManager(9652): mCurState=2 mStateSaved=false mDestroyed=false
10-09 18:09:03.927: D/FragmentManager(9652): View Hierarchy:
10-09 18:09:03.927: D/FragmentManager(9652): com.android.internal.policy.impl.PhoneWindow$DecorView{422d31a8 V.E..... ... 0,0-0,0}
10-09 18:09:03.932: D/FragmentManager(9652): com.android.internal.widget.ActionBarOverlayLayout{422d37e8 V.ED.... ... 0,0-0,0 #1020313 android:id/action_bar_overlay_layout}
10-09 18:09:03.932: D/FragmentManager(9652): android.widget.FrameLayout{422d43f8 V.E..... ... 0,0-0,0 #1020002 android:id/content}
10-09 18:09:03.932: D/FragmentManager(9652): android.widget.TextView{422e3b30 V.ED.... ... 0,0-0,0}
10-09 18:09:03.932: D/FragmentManager(9652): com.android.internal.widget.ActionBarContainer{422d47f8 V.ED.... ... 0,0-0,0 #1020314 android:id/action_bar_container}
10-09 18:09:03.932: D/FragmentManager(9652): com.android.internal.widget.ActionBarView{422d4d00 V.E..... ... 0,0-0,0 #1020315 android:id/action_bar}
10-09 18:09:03.932: D/FragmentManager(9652): android.widget.LinearLayout{422d5270 VFE...C. ... 0,0-0,0}
10-09 18:09:03.932: D/FragmentManager(9652): com.android.internal.widget.ActionBarView$HomeView{422d6350 V.E..... ... 0,0-0,0}
10-09 18:09:03.937: D/FragmentManager(9652): android.widget.ImageView{422d66e8 V.ED.... ... 0,0-0,0 #102025a android:id/up}
10-09 18:09:03.937: D/FragmentManager(9652): android.widget.ImageView{422d6a48 V.ED.... ... 0,0-0,0 #102002c android:id/home}
10-09 18:09:03.937: D/FragmentManager(9652): android.widget.LinearLayout{422d7c40 G.E..... ... 0,0-0,0}
10-09 18:09:03.937: D/FragmentManager(9652): android.widget.TextView{422d7f58 V.ED.... ... 0,0-0,0 #1020265 android:id/action_bar_title}
10-09 18:09:03.937: D/FragmentManager(9652): android.widget.TextView{422d8be0 G.ED.... ... 0,0-0,0 #1020266 android:id/action_bar_subtitle}
10-09 18:09:03.937: D/FragmentManager(9652): com.android.internal.widget.ActionBarContextView{422d9200 G.E..... ... 0,0-0,0 #1020316 android:id/action_context_bar}
10-09 18:09:03.937: D/AndroidRuntime(9652): Shutting down VM
10-09 18:09:03.937: W/dalvikvm(9652): threadid=1: thread exiting with uncaught exception (group=0x41f55ba8)
10-09 18:09:03.942: E/AndroidRuntime(9652): FATAL EXCEPTION: main
10-09 18:09:03.942: E/AndroidRuntime(9652): Process: com.example.myfirstapp, PID: 9652
10-09 18:09:03.942: E/AndroidRuntime(9652): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.myfirstapp/com.example.myfirstapp.DisplayMessageActivity}: java.lang.IllegalArgumentException: No view found for id 0x7f05003c (com.example.myfirstapp:id/container) for fragment PlaceholderFragment{422e3888 #0 id=0x7f05003c}
10-09 18:09:03.942: E/AndroidRuntime(9652): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2184)
10-09 18:09:03.942: E/AndroidRuntime(9652): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2233)
10-09 18:09:03.942: E/AndroidRuntime(9652): at android.app.ActivityThread.access$800(ActivityThread.java:135)
10-09 18:09:03.942: E/AndroidRuntime(9652): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1196)
10-09 18:09:03.942: E/AndroidRuntime(9652): at android.os.Handler.dispatchMessage(Handler.java:102)
10-09 18:09:03.942: E/AndroidRuntime(9652): at android.os.Looper.loop(Looper.java:136)
10-09 18:09:03.942: E/AndroidRuntime(9652): at android.app.ActivityThread.main(ActivityThread.java:5001)
10-09 18:09:03.942: E/AndroidRuntime(9652): at java.lang.reflect.Method.invokeNative(Native Method)
10-09 18:09:03.942: E/AndroidRuntime(9652): at java.lang.reflect.Method.invoke(Method.java:515)
10-09 18:09:03.942: E/AndroidRuntime(9652): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:785)
10-09 18:09:03.942: E/AndroidRuntime(9652): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:601)
10-09 18:09:03.942: E/AndroidRuntime(9652): at dalvik.system.NativeStart.main(Native Method)
10-09 18:09:03.942: E/AndroidRuntime(9652): Caused by: java.lang.IllegalArgumentException: No view found for id 0x7f05003c (com.example.myfirstapp:id/container) for fragment PlaceholderFragment{422e3888 #0 id=0x7f05003c}
10-09 18:09:03.942: E/AndroidRuntime(9652): at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:934)
10-09 18:09:03.942: E/AndroidRuntime(9652): at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1121)
10-09 18:09:03.942: E/AndroidRuntime(9652): at android.support.v4.app.BackStackRecord.run(BackStackRecord.java:682)
10-09 18:09:03.942: E/AndroidRuntime(9652): at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1484)
10-09 18:09:03.942: E/AndroidRuntime(9652): at android.support.v4.app.FragmentActivity.onStart(FragmentActivity.java:571)
10-09 18:09:03.942: E/AndroidRuntime(9652): at android.app.Instrumentation.callActivityOnStart(Instrumentation.java:1171)
10-09 18:09:03.942: E/AndroidRuntime(9652): at android.app.Activity.performStart(Activity.java:5241)
10-09 18:09:03.942: E/AndroidRuntime(9652): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2157)
10-09 18:09:03.942: E/AndroidRuntime(9652): ... 11 more
MainActivity.java
package com.example.myfirstapp;
import android.content.Intent;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v7.app.ActionBarActivity;
import android.util.Log;
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 ActionBarActivity {
public final static String EXTRA_MESSAGE = "com.example.myfirstapp.MESSAGE";
public void sendMessage(View view) {
Log.d("Send Message Button", "Pressed");
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);
}
@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;
}
}
}
DisplayMessageActivity.java
package com.example.myfirstapp;
import android.content.Intent;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v7.app.ActionBarActivity;
import android.view.LayoutInflater;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;
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();
}
// Get the message from the intent
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 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;
}
}
}
感谢任何帮助。感谢
编辑：干净了，现在是logcat：
10-09 18:24:43.317: W/dalvikvm(9771): threadid=1: thread exiting with uncaught exception (group=0x41f55ba8)
10-09 18:24:43.322: E/AndroidRuntime(9771): FATAL EXCEPTION: main
10-09 18:24:43.322: E/AndroidRuntime(9771): Process: com.example.myfirstapp, PID: 9771
10-09 18:24:43.322: E/AndroidRuntime(9771): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.myfirstapp/com.example.myfirstapp.DisplayMessageActivity}: java.lang.IllegalArgumentException: No view found for id 0x7f05003c (com.example.myfirstapp:id/container) for fragment PlaceholderFragment{4228bce8 #0 id=0x7f05003c}
10-09 18:24:43.322: E/AndroidRuntime(9771): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2184)
10-09 18:24:43.322: E/AndroidRuntime(9771): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2233)
10-09 18:24:43.322: E/AndroidRuntime(9771): at android.app.ActivityThread.access$800(ActivityThread.java:135)
10-09 18:24:43.322: E/AndroidRuntime(9771): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1196)
10-09 18:24:43.322: E/AndroidRuntime(9771): at android.os.Handler.dispatchMessage(Handler.java:102)
10-09 18:24:43.322: E/AndroidRuntime(9771): at android.os.Looper.loop(Looper.java:136)
10-09 18:24:43.322: E/AndroidRuntime(9771): at android.app.ActivityThread.main(ActivityThread.java:5001)
10-09 18:24:43.322: E/AndroidRuntime(9771): at java.lang.reflect.Method.invokeNative(Native Method)
10-09 18:24:43.322: E/AndroidRuntime(9771): at java.lang.reflect.Method.invoke(Method.java:515)
10-09 18:24:43.322: E/AndroidRuntime(9771): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:785)
10-09 18:24:43.322: E/AndroidRuntime(9771): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:601)
10-09 18:24:43.322: E/AndroidRuntime(9771): at dalvik.system.NativeStart.main(Native Method)
10-09 18:24:43.322: E/AndroidRuntime(9771): Caused by: java.lang.IllegalArgumentException: No view found for id 0x7f05003c (com.example.myfirstapp:id/container) for fragment PlaceholderFragment{4228bce8 #0 id=0x7f05003c}
10-09 18:24:43.322: E/AndroidRuntime(9771): at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:934)
10-09 18:24:43.322: E/AndroidRuntime(9771): at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1121)
10-09 18:24:43.322: E/AndroidRuntime(9771): at android.support.v4.app.BackStackRecord.run(BackStackRecord.java:682)
10-09 18:24:43.322: E/AndroidRuntime(9771): at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1484)
10-09 18:24:43.322: E/AndroidRuntime(9771): at android.support.v4.app.FragmentActivity.onStart(FragmentActivity.java:571)
10-09 18:24:43.322: E/AndroidRuntime(9771): at android.app.Instrumentation.callActivityOnStart(Instrumentation.java:1171)
10-09 18:24:43.322: E/AndroidRuntime(9771): at android.app.Activity.performStart(Activity.java:5241)
10-09 18:24:43.322: E/AndroidRuntime(9771): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2157)
10-09 18:24:43.322: E/AndroidRuntime(9771): ... 11 more
答案 0 :(得分：2)
您已将视图R.layout.activity_display_message替换为文本视图。布局R.layout.activity_display_message包含将片段放入其中的容器。
IllegalArgument在您的setContentView中传递，在您的情况下是textView，因此您的mainActivity中的容器ID丢失，您的片段仍然附加到您的活动，这就是发生异常的原因。
答案 1 :(得分：1)
虽然你没有提供xml。检查您的xml文件并查找容器因为它显示找不到容器的视图。尝试使用框架布局
添加或替换它10-09 18:09:03.942: E/AndroidRuntime(9652): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.myfirstapp/com.example.myfirstapp.DisplayMessageActivity}: java.lang.IllegalArgumentException: No view found for id 0x7f05003c (com.example.myfirstapp:id/container) for fragment PlaceholderFragment{422e3888 #0 id=0x7f05003c}
答案 2 :(得分：0)
在setContentView中，您必须设置在/ res / layout文件夹中定义的布局。在那里你可以创建你的textView ... 例如setContentView（R.layout.myFirstLayout）;