不幸的是，應用程序的名字已停止線程錯誤

-2

我試圖讓啓動在MainActivity當用戶點擊該按鈕secondActivity打開並顯示三個單選按鈕單選按鈕組一個簡單的Android程序。當用戶點擊單選按鈕並按下按鈕時，該字符串傳遞給mainActivity，並應顯示在textView On mainActivity上。不幸的是，應用程序的名字已停止線程錯誤

現在我已經使用使用戶通過顯示消息，等待5秒鐘一個線程等待5 ..然後更換5至4答等等......，最後，當談到0它顯示了答案[正確或錯誤] ..問題是，當它達到4 ..不幸的是，應用程序已停止錯誤發生..

這裏是我的代碼：

mainActivity.java

package com.example.radiobuttons; 

import android.support.v4.widget.SimpleCursorAdapter.ViewBinder; 
import android.support.v7.app.ActionBarActivity; 
import android.app.Activity; 
import android.content.Intent; 
import android.os.Bundle; 
import android.view.Menu; 
import android.view.MenuItem; 
import android.widget.Button; 
import android.widget.TextView; 
import android.view.View; 


public class MainActivity extends Activity { 

    TextView txt1; 
    Button b1; 
    int requestCode = 12; 
    int j=1; 
    String ANS; 
    int t=5; 

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

     Link(); 
     b1.setOnClickListener(new View.OnClickListener() { 

      @Override 
      public void onClick(View v) { 
       // TODO Auto-generated method stub 
       Intent in = new Intent(MainActivity.this , secondActivity.class); 
       startActivityForResult(in, requestCode); 
      } 
     }); 

    } 

    public void Link() 
    { 
     txt1 = (TextView) findViewById(R.id.txtView1); 
     b1 = (Button) findViewById(R.id.Button1); 
    } 



    @Override 
    protected void onActivityResult(int requestCode, int resultCode, Intent data) { 
     // TODO Auto-generated method stub 
     super.onActivityResult(requestCode, resultCode, data); 
     if (resultCode == 110) 
     { 
     ANS = data.getStringExtra("Message"); 
     String txt ="Your Answer Is = " + data.getStringExtra("Message"); 
     txt1.setText(txt); 
     } 
     th.start(); 
    } 

    Thread th = new Thread() 
    { 
    public void run() 
    { 
     try 
     { 

       Thread.sleep(1000); 
       t = t-1; 


     } 
     catch(InterruptedException e) 
     { 
      e.printStackTrace(); 
     } 
     finally 
     { 
      txt1.setText("Wait" + t); 
      if (t==0) 
      { 
       if(ANS.equals("Narender Modi")) 
       { 
        txt1.setText("Your Answer Is Correct"); 
       } 
       else 
       { 
        txt1.setText("You Are Wrong."); 
       } 


      } 
      else 
      { 
       th.start(); 
      } 


     } 
    } 
    }; 



}

secondActivity.java

個

package com.example.radiobuttons; 

    import android.app.Activity; 
    import android.content.Intent; 
    import android.os.Bundle; 
    import android.view.View; 
    import android.widget.Button; 
    import android.widget.RadioGroup; 
    import android.widget.RadioGroup.OnCheckedChangeListener; 

    public class secondActivity extends Activity { 

     RadioGroup rg; 
     Button b1; 
     String ans; 
     Intent in; 
     @Override 
     protected void onCreate(Bundle savedInstanceState) { 
      // TODO Auto-generated method stub 
      super.onCreate(savedInstanceState); 
      setContentView(R.layout.second); 
      Link(); 

      rg.setOnCheckedChangeListener(new OnCheckedChangeListener() { 

       @Override 
       public void onCheckedChanged(RadioGroup group, int checkedId) { 
        // TODO Auto-generated method stub 

        switch (group.getId()) 
        { 
        case R.id.radio0: 
         ans = "Manmohan Singh"; 

         break; 
        case R.id.radio1: 
         ans = "Mulayam Singh"; 
         break; 
        case R.id.radio2: 
         ans = "Narender Modi"; 
         break; 
        } 

       } 
      }); 

      b1.setOnClickListener(new View.OnClickListener() { 

       @Override 
       public void onClick(View v) { 
        // TODO Auto-generated method stub 
        in = new Intent(); 
        in.putExtra("answer", ans); 
        setResult(110,in); 
        finish(); 
       } 
      }); 
     } 

     public void Link() 
     { 
      rg = (RadioGroup) findViewById(R.id.radioGroup1); 
      b1 = (Button) findViewById(R.id.Button1); 

     } 
    }

單選按鈕清單

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

    <uses-sdk 
     android:minSdkVersion="8" 
     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=".secondActivity" 
      android:label="@string/app_name" > 
      <intent-filter> 
       <action android:name="com.example.radiobutton.SECONDACTIVITY" /> 

       <category android:name="android.intent.category.DEFAULT" /> 
      </intent-filter> 
     </activity> 
    </application> 

</manifest>

logcat的：

06-20 15:12:24.846: E/AndroidRuntime(1952): FATAL EXCEPTION: Thread-117 
06-20 15:12:24.846: E/AndroidRuntime(1952): Process: com.example.radiobuttons, PID: 1952 
06-20 15:12:24.846: E/AndroidRuntime(1952): android.view.ViewRootImpl$CalledFromWrongThreadException: Only the original thread that created a view hierarchy can touch its views. 
06-20 15:12:24.846: E/AndroidRuntime(1952):  at android.view.ViewRootImpl.checkThread(ViewRootImpl.java:6024) 
06-20 15:12:24.846: E/AndroidRuntime(1952):  at android.view.ViewRootImpl.requestLayout(ViewRootImpl.java:820) 
06-20 15:12:24.846: E/AndroidRuntime(1952):  at android.view.View.requestLayout(View.java:16431) 
06-20 15:12:24.846: E/AndroidRuntime(1952):  at android.view.View.requestLayout(View.java:16431) 
06-20 15:12:24.846: E/AndroidRuntime(1952):  at android.view.View.requestLayout(View.java:16431) 
06-20 15:12:24.846: E/AndroidRuntime(1952):  at android.view.View.requestLayout(View.java:16431) 
06-20 15:12:24.846: E/AndroidRuntime(1952):  at android.widget.RelativeLayout.requestLayout(RelativeLayout.java:352) 
06-20 15:12:24.846: E/AndroidRuntime(1952):  at android.view.View.requestLayout(View.java:16431) 
06-20 15:12:24.846: E/AndroidRuntime(1952):  at android.widget.TextView.checkForRelayout(TextView.java:6600) 
06-20 15:12:24.846: E/AndroidRuntime(1952):  at android.widget.TextView.setText(TextView.java:3813) 
06-20 15:12:24.846: E/AndroidRuntime(1952):  at android.widget.TextView.setText(TextView.java:3671) 
06-20 15:12:24.846: E/AndroidRuntime(1952):  at android.widget.TextView.setText(TextView.java:3646) 
06-20 15:12:24.846: E/AndroidRuntime(1952):  at com.example.radiobuttons.MainActivity$1.run(MainActivity.java:81) 
06-20 15:12:26.882: I/Process(1952): Sending signal. PID: 1952 SIG: 9

activity_main.xml中

<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.radiobuttons.MainActivity" > 

    <TextView 
     android:id="@+id/txtView1" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:text="@string/hello_world" /> 
    <Button 
     android:id="@+id/Button1" 
     android:layout_height="wrap_content" 
     android:layout_width="fill_parent" 
     android:gravity="center_horizontal" 
     android:layout_below="@+id/txtView1" 
     android:text="Get Input From Second Activity" /> 

</RelativeLayout>

second.xml

<?xml version="1.0" encoding="utf-8"?> 
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    android:layout_width="match_parent" 
    android:layout_height="match_parent" > 

    <TextView 
     android:id="@+id/textView1" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:layout_alignLeft="@+id/radioGroup1" 
     android:layout_alignParentTop="true" 
     android:layout_marginTop="17dp" 
     android:text="Prime Minister Of India?" /> 

    <RadioGroup 
     android:id="@+id/radioGroup1" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:layout_alignParentLeft="true" 
     android:layout_below="@+id/textView1" 
     android:layout_marginLeft="30dp" 
     android:layout_marginTop="21dp" > 

     <RadioButton 
      android:id="@+id/radio0" 
      android:layout_width="wrap_content" 
      android:layout_height="wrap_content" 

      android:text="Manmohan Singh" /> 

     <RadioButton 
      android:id="@+id/radio1" 
      android:layout_width="wrap_content" 
      android:layout_height="wrap_content" 
      android:text="Mulayam Singh" /> 

     <RadioButton 
      android:id="@+id/radio2" 
      android:layout_width="wrap_content" 
      android:layout_height="wrap_content" 
      android:text="Narender Modi" /> 
    </RadioGroup> 

    <Button 
     android:id="@+id/button1" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:layout_alignLeft="@+id/radioGroup1" 
     android:layout_below="@+id/radioGroup1" 
     android:layout_marginTop="39dp" 
     android:text="Submit Answer" /> 

</RelativeLayout>

來源

2015-06-20 Akshay

你爲什麼要標明這個問題進行復制？ – Akshay

它被標記爲重複，因爲它是重複的。 – hexafraction

你能告訴我鏈接的地方有同樣的問題嗎？ – Akshay

問題是，您正在編輯與UI線程不同的線程中的視圖。

那麼有兩種可能解決此問題。

調用Activity的ExecuteInUiThread()方法來更新你的TextView
使用AsyncTask和更新onProgressUpdate()方法中的觀點

來源

2015-06-20 19:49:58

你應該更新TextView S IN的UI線程（主線程）。有幾種方法可以完成此操作，例如，您可以使用活動的runOnUiThread()。

runOnUiThread(new runnable(){ 
    @Override 
    public void run(){ 
     // update that TextView here 
    } 
});

來源

2015-06-20 19:52:24

不幸的是，應用程序的名字已停止線程錯誤

回答

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