我的第一個應用程序教程「不幸的是，我的第一個應用程序已停止。」

我目前正在瀏覽Android開發人員教程，並在最基本的教程中將一個活動的意圖傳遞給另一個活動並顯示結果。我的第一個應用程序教程「不幸的是，我的第一個應用程序已停止。」

Eclipse中顯示的應用程序已經沒有錯誤，直到我插入幾行代碼，一切工作正常（沒有功能）：

// 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);

我看logcat的，並沒有管理解決一個錯誤的位置我只是錯誤地命名了一些東西，但現在我再次陷入困境。這是我目前的logcat輸出：

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):  [email protected] 
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):  [email protected] 
10-09 18:09:03.927: D/FragmentManager(9652):  [email protected] 
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; 
     } 
    } 
}

任何幫助表示讚賞。由於

編輯：冉乾淨的，這是現在的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

來源

2014-10-09 Alex Knight

清理項目（項目>從Eclipse主菜單中清潔），並嘗試再次運行它。 – CommonsWare 2014-10-09 17:16:44

完成，結果相同。上面提供的Logcat編輯。 – 2014-10-09 17:26:28

您已將視圖R.layout.activity_display_message替換爲文本視圖。佈局R.layout.activity_display_message包含將片段放入其中的容器。

IllegalArgument被傳遞到您的案例中的textView的setContentView中，因此mainActivity中的容器Id缺失，您的片段仍然附加到您的活動，這就是爲什麼發生異常。

來源

2014-10-09 17:33:10

好的，我想我已經知道你在說什麼了。我現在已經開始工作了，但實際上並沒有添加任何ID。我刪除了這段代碼： \t \t setContentView（R.layout.activity_display_message）; 。 \t \t如果（savedInstanceState == NULL）{ \t \t \t getSupportFragmentManager（）的BeginTransaction（） \t \t \t \t \t。新增（R.id.container，新PlaceholderFragment（））提交（）; \t \t} 這似乎解決了這個問題。 – 2014-10-09 17:41:33

Id實際上是添加在您的R.layout.activity_display_message xml文件中。你基本上刪除了使用該Id的碎片部分。 – 2014-10-09 17:44:55

好吧，所以「最佳實踐」明智的應該保持在那裏的代碼，我應該添加ID到mainActivity或者是這樣的罰款嗎？ – 2014-10-09 19:06:59

在你的setContentView你必須設置你的/ RES /佈局文件夾中定義的佈局。在那裏你可以創建你的textView ... 例如setContentView（R.layout.myFirstLayout）;

來源

2014-10-09 17:30:02 Kewitschka

雖然你還沒有提供XML。檢查你的xml文件，並尋找容器因爲它說沒有找到容器的視圖。嘗試添加或框架佈局替換它

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}

來源

2014-10-09 17:36:19

我的第一個應用程序教程「不幸的是，我的第一個應用程序已停止。」

回答

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