不幸的是，我的應用程序已停止

-2

我在Android應用程序中遇到了一些錯誤，而我似乎無法修復它。不幸的是，我的應用程序已停止

老實說，我不知道很多關於logcat，因爲我以前沒有真正收到錯誤。我希望你的一些敏銳的眼睛能夠阻止這個問題。

我的活動：

package com.comrades.splashscreen; 

import java.util.Timer; 
import java.util.TimerTask; 

import android.app.Activity; 
import android.content.Context; 
import android.content.res.Configuration; 
import android.hardware.Sensor; 
import android.hardware.SensorEvent; 
import android.hardware.SensorEventListener; 
import android.hardware.SensorManager; 
import android.os.Bundle; 
import android.os.Handler; 
import android.os.SystemClock; 
import android.view.Display; 
import android.view.Menu; 
import android.view.MenuItem; 
import android.view.View; 
import android.view.ViewGroup.LayoutParams; 
import android.widget.Button; 
import android.widget.FrameLayout; 
import android.widget.TextView; 

import com.plambech.splashscreen.R; 


public class GameActivity extends Activity { 

    BallView mBallView = null; 
    Handler RedrawHandler = new Handler(); //so redraw occurs in main thread 
    Timer mTmr = null; 
    TimerTask mTsk = null; 
    int mScrWidth, mScrHeight; 
    android.graphics.PointF mBallPos, mBallSpd; 

    AsteroidView mAsteroidView = null; 

    private Button startButton; 
    private TextView timerValue; 

    private long startTime = 0L; 

    private Handler customHandler = new Handler(); 

    long timeInMilliseconds = 0L; 
    long timeSwapBuff = 0L; 
    long updatedTime = 0L; 

    @Override 
    public void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.game); 
     //create pointer to main screen 
     final FrameLayout mainView = 
     (android.widget.FrameLayout)findViewById(R.id.game_view); 

     //get screen dimensions 
     Display display = getWindowManager().getDefaultDisplay(); 
     mScrWidth = display.getWidth(); 
     mScrHeight = display.getHeight(); 
     mBallPos = new android.graphics.PointF(); 
     mBallSpd = new android.graphics.PointF(); 

     //create variables for ball position and speed 
     mBallPos.x = (mScrWidth/2)-34; 
     mBallPos.y = mScrHeight - 170; 
     mBallSpd.x = 2; 

     //create initial ball 
     mBallView = new BallView(this, mBallPos.x, mBallPos.y); 
     mAsteroidView = new AsteroidView(this, 50, 50);     

     mainView.addView(mBallView); //add ball to main screen 
     mainView.addView(mAsteroidView); 
     mBallView.invalidate(); //call onDraw in BallView 

     //listener for accelerometer, use anonymous class for simplicity 
     ((SensorManager)getSystemService(Context.SENSOR_SERVICE)).registerListener(
      new SensorEventListener() {  
       @Override 
       public void onSensorChanged(SensorEvent event) { 
        //set ball speed based on phone tilt (ignore Z axis) 
        mBallSpd.x = -event.values[0]; 
        //timer event will redraw ball 
       } 
       @Override 
       public void onAccuracyChanged(Sensor sensor, int accuracy) {} //ignore 
      }, 
      ((SensorManager)getSystemService(Context.SENSOR_SERVICE)) 
      .getSensorList(Sensor.TYPE_ACCELEROMETER).get(0), 
      SensorManager.SENSOR_DELAY_NORMAL); 

     timerValue = (TextView) findViewById(R.id.score); 

     startButton = (Button) findViewById(R.id.startButton); 

     startButton.setOnClickListener(new View.OnClickListener() {  
      public void onClick(View view) { 
       startTime = SystemClock.uptimeMillis(); 
       customHandler.postDelayed(updateTimerThread, 0); 

      } 
     }); 

    } //OnCreate 

    private Runnable updateTimerThread = new Runnable() { 

     public void run() { 

      timeInMilliseconds = SystemClock.uptimeMillis() - startTime; 

      updatedTime = timeSwapBuff + timeInMilliseconds; 

      int secs = (int) (updatedTime/1000); 
      int mins = secs/60; 
      secs = secs % 60; 
      int milliseconds = (int) (updatedTime % 1000); 
      timerValue.setText("" + mins + ":" 
        + String.format("%02d", secs) + ":" 
        + String.format("%03d", milliseconds)); 
      customHandler.postDelayed(this, 0); 
     } 

    }; 

    //listener for menu button on phone 
    @Override 
    public boolean onCreateOptionsMenu(Menu menu) 
    { 
     menu.add("Exit"); //only one menu item 
     return super.onCreateOptionsMenu(menu); 
    } 

    //listener for menu item clicked 
    @Override 
    public boolean onOptionsItemSelected(MenuItem item) 
    { 
     // Handle item selection  
     if (item.getTitle() == "Go back") //user clicked Exit 
      finish(); //will call onPause 
     return super.onOptionsItemSelected(item);  
    } 

    //For state flow see http://developer.android.com/reference/android/app/Activity.html 
    @Override 
    public void onPause() //app moved to background, stop background threads 
    { 
     mTmr.cancel(); //kill\release timer (our only background thread) 
     mTmr = null; 
     mTsk = null; 
     super.onPause(); 
    } 

    @Override 
    public void onResume() //app moved to foreground (also occurs at app startup) 
    { 
     //create timer to move ball to new position 
     mTmr = new Timer(); 
     mTsk = new TimerTask() { 
     public void run() { 

     //if debugging with external device, 
     // a log cat viewer will be needed on the device 
     android.util.Log.d("TiltBall","Timer Hit - " + mBallPos.x + ":" + mBallPos.y); 

     //move ball based on current speed 
     mBallPos.x += mBallSpd.x; 

     //if ball goes off screen, reposition to opposite side of screen 
     if (mBallPos.x > (mScrWidth-68)) {mBallPos.x=mScrWidth-68;} 
     if (mBallPos.x < 0) {mBallPos.x=0;} 

     //update ball class instance 
     mBallView.x = mBallPos.x; 
     mBallView.y = mBallPos.y; 
     //redraw ball. Must run in background thread to prevent thread lock. 
     RedrawHandler.post(new Runnable() { 
      public void run() {  
      mBallView.invalidate(); 
      }}); 
     }}; // TimerTask 

     mTmr.schedule(mTsk,10,10); //start timer 
     super.onResume(); 
     } // onResume 

    //listener for config change. 
    //This is called when user tilts phone enough to trigger landscape view 
    //we want our app to stay in portrait view, so bypass event 
    @Override 
    public void onConfigurationChanged(Configuration newConfig) 
    { 
     super.onConfigurationChanged(newConfig); 
    } 

    public void HighScores() 
    { 
     int i = 99999999; 
     TextView t = new TextView(this); 
     t=(TextView)findViewById(R.id.score); 
     t.setText("SCORE: "+i); 
    } 

} //TiltBallActivity

我的XML：

<?xml version="1.0" encoding="utf-8"?> 
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    xmlns:tools="http://schemas.android.com/tools" 
    android:orientation="vertical" 
    android:layout_width="match_parent" 
    android:layout_height="match_parent" 
    android:id="@+id/game_view" 
    android:background="@drawable/space_background"> 


<TextView 
     android:id="@+id/score" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:layout_centerHorizontal="true" 
     android:layout_marginBottom="37dp" 
     android:textSize="40sp" 
     android:textColor="@color/yellow" 
     android:text="@string/timerVal" 
     android:textAppearance="?android:attr/textAppearanceMedium"/> 

    <Button 
     android:id="@+id/startButton" 
     android:layout_width="90dp" 
     android:layout_height="45dp" 
     android:layout_centerHorizontal="true" 
     android:layout_marginTop="191dp" 
     android:text="@string/startButtonLabel" /> 

</RelativeLayout>

和日誌：

02-24 15:23:03.201: E/AndroidRuntime(1404): FATAL EXCEPTION: main 
02-24 15:23:03.201: E/AndroidRuntime(1404): Process: com.plambech.splashscreen, PID: 1404 
02-24 15:23:03.201: E/AndroidRuntime(1404): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.plambech.splashscreen/com.comrades.splashscreen.GameActivity}: java.lang.ClassCastException: android.widget.RelativeLayout cannot be cast to android.widget.FrameLayout 
02-24 15:23:03.201: E/AndroidRuntime(1404):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2195) 
02-24 15:23:03.201: E/AndroidRuntime(1404):  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2245) 
02-24 15:23:03.201: E/AndroidRuntime(1404):  at android.app.ActivityThread.access$800(ActivityThread.java:135) 
02-24 15:23:03.201: E/AndroidRuntime(1404):  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1196) 
02-24 15:23:03.201: E/AndroidRuntime(1404):  at android.os.Handler.dispatchMessage(Handler.java:102) 
02-24 15:23:03.201: E/AndroidRuntime(1404):  at android.os.Looper.loop(Looper.java:136) 
02-24 15:23:03.201: E/AndroidRuntime(1404):  at android.app.ActivityThread.main(ActivityThread.java:5017) 
02-24 15:23:03.201: E/AndroidRuntime(1404):  at java.lang.reflect.Method.invokeNative(Native Method) 
02-24 15:23:03.201: E/AndroidRuntime(1404):  at java.lang.reflect.Method.invoke(Method.java:515) 
02-24 15:23:03.201: E/AndroidRuntime(1404):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:779) 
02-24 15:23:03.201: E/AndroidRuntime(1404):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:595) 
02-24 15:23:03.201: E/AndroidRuntime(1404):  at dalvik.system.NativeStart.main(Native Method) 
02-24 15:23:03.201: E/AndroidRuntime(1404): Caused by: java.lang.ClassCastException: android.widget.RelativeLayout cannot be cast to android.widget.FrameLayout 
02-24 15:23:03.201: E/AndroidRuntime(1404):  at com.comrades.splashscreen.GameActivity.onCreate(GameActivity.java:56) 
02-24 15:23:03.201: E/AndroidRuntime(1404):  at android.app.Activity.performCreate(Activity.java:5231) 
02-24 15:23:03.201: E/AndroidRuntime(1404):  at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087) 
02-24 15:23:03.201: E/AndroidRuntime(1404):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2159) 
02-24 15:23:03.201: E/AndroidRuntime(1404):  ... 11 more

一切都發生在我嘗試添加該定時器。

對不起所有代碼的長度。但我想你需要這一切。

謝謝！

來源

2014-02-24 Adnaves

'android.widget.RelativeLayout不能轉換到android.widget.FrameLayout' –

'GameActivity.java：56' –

日誌說明了一切 - 錯字是在這裏：

final FrameLayout mainView = 
    (android.widget.FrameLayout)findViewById(R.id.game_view);

你game_view是RelativeLayout，所以它應該是以下幾點：

final RelativeLayout mainView = 
    (android.widget.RelativeLayout)findViewById(R.id.game_view);

來源

2014-02-24 20:33:34 nikis

哇。這是一個快速響應。非常感謝你。這解決了我的問題。如果允許，我會在8分鐘內接受你的回答。 :-) – Adnaves

android.widget.RelativeLayout不能投到android.widget.FrameLayout

這個錯誤告訴你一切都改變你的代碼到這個

final RelativeLayout mainView = (android.widget.RelativeLayout)findViewById(R.id.game_view);

來源

2014-02-24 20:34:48

的問題是在這裏：

final FrameLayout mainView = 
         (android.widget.FrameLayout)findViewById(R.id.game_view);

你logcat的展望（你需要學習如何閱讀這些東西）：

Caused by: java.lang.ClassCastException: android.widget.RelativeLayout cannot be cast to android.widget.FrameLayout 
at com.comrades.splashscreen.GameActivity.onCreate(GameActivity.java:56)

所以上線56 GameActivity.java類，android.widget.RelativeLayout cannot be cast to android.widget.FrameLayout

我會假設你需要改變這一行這樣的：

final FrameLayout mainView = 
        (android.widget.RelativeLayout)findViewById(R.id.game_view);

來源

2014-02-24 20:36:19

不幸的是，我的應用程序已停止

回答

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