位圖複製自己，直到android應用程序崩潰

Question

因此，我有一個應用程序，它應該把2位圖上的相機預覽頂部。但是，由於我切換到表面視圖而不是視圖，所以位圖會自我複製，直到崩潰爲止。誰能幫忙？

CameraActivity.java：

package com.cs461.Ian; 

//TODO:Add accelerometer support 
//TODO:Add Clickable ghosts 
//TODO:Add camera background 
/*Completed:(As of 2:30am 4/16) 
* Activity launches 
* Ghost appears on screen 
* Ghost will randomly move around the screen 
*/ 

import java.io.IOException; 
import java.util.Random; 

import android.app.Activity; 
import android.content.Context; 
import android.graphics.Bitmap; 
import android.graphics.BitmapFactory; 
import android.graphics.Canvas; 
import android.hardware.Camera; 
import android.os.Bundle; 
import android.util.Log; 
import android.view.MotionEvent; 
import android.view.SurfaceHolder; 
import android.view.SurfaceView; 
import android.view.View; 
import android.view.ViewGroup; 
import android.widget.TextView; 

public class CameraActivity extends Activity{ 

Bitmap g; 
Ghost a; 
Ghost still; 
SurfaceHolder mSurfaceHolder; 
boolean firsttime=true; 
int draw_x,draw_y,xSpeed,ySpeed; 
static int score=0; 
static TextView t; 
static Camera bgCamera; 

@Override 
public boolean dispatchTouchEvent(MotionEvent event){ 
    return false; 

} 

@Override 
public void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    //setContentView(R.layout.game); 
    a = new Ghost(getApplicationContext()); 
    still = new Ghost(getApplicationContext()); 

    a.Initalize(BitmapFactory.decodeResource(getResources(), R.drawable.ghost), 120, 120); 
    still.Initalize(BitmapFactory.decodeResource(getResources(), R.drawable.ghost), 120, 120); 



    /*a.setOnTouchListener(new View.OnTouchListener() { 
     @Override 
     public boolean onTouch(View v, MotionEvent event) { 
      if (event.getAction() == MotionEvent.ACTION_DOWN){ 
       score++; 
       t.setText("Score: "+score); 
       Log.w("CLICKED","Clicked on ghost "+score+" times"); 

      } 
      return true; 
     } 
    }); 
    Log.w("Added","Still added ontouchlistener"); 
    still.setOnTouchListener(new View.OnTouchListener() { 
     @Override 
     public boolean onTouch(View v, MotionEvent event) { 
      if (event.getAction() == MotionEvent.ACTION_DOWN){ 
       score++; 
       t.setText("Score: "+score); 
       Log.w("CLICKED","Clicked on ghost "+score+" times"); 

      } 
      return true; 
     } 
    });*/ 



    setContentView(new Panel(this)); 
} 

class DrawThread extends Thread { 
    private SurfaceHolder _surfaceHolder; 
    private Panel _panel; 
    private boolean _run = false; 

    public DrawThread(SurfaceHolder surfaceHolder, Panel panel) { 
     _surfaceHolder = surfaceHolder; 
     _panel = panel; 
    } 

    public void setRunning(boolean run) { 
     _run = run; 
    } 

    @Override 
    public void run() { 

     runOnUiThread(new Runnable() { 
      public void run() { 
       Canvas c; 

     //stuff that updates ui    

     while(_run) { 
      c = null; 
      try { 
       c = _surfaceHolder.lockCanvas(null); 
       synchronized(_surfaceHolder) { 
        _panel.invalidate(); 
        _panel.onDraw(c); 
       } 
      } finally { 
       if (c != null) { 
        _surfaceHolder.unlockCanvasAndPost(c); 
       } 
      } 

     } 
      } 
     }); 
    } 
} 

class Panel extends SurfaceView implements SurfaceHolder.Callback { 
    private DrawThread _thread; 

    public Panel(Context context) { 
     super(context); 
     getHolder().addCallback(this); 
     _thread = new DrawThread(getHolder(), this); 
    } 

    @Override 
    public void onDraw(Canvas canvas) { 
     //g.Initalise(BitmapFactory.decodeFile("/res/drawable-hdpi/ghost.png"), 200, 150, 5, 5);; 
     update(canvas); 
     invalidate(); 
    } 

    /*Places ghost on screen and bounces it around in the screen. My phone is apparently only API level 4(the most up to date is 15) so i didn't code it 
    *for the accelerometer yet. 
    */ 
    public void update(Canvas canvas) { 
     Random rand = new Random(); 

     if(firsttime){ 
      draw_x = Math.round(System.currentTimeMillis() % (this.getWidth()*2)) ; 
      draw_y = Math.round(System.currentTimeMillis() % (this.getHeight()*2)) ; 
      xSpeed = rand.nextInt(10); 
      ySpeed = rand.nextInt(10); 
      still.draw(canvas); 
      firsttime=false; 
     } 
     draw_x+=xSpeed; 
     draw_y+=ySpeed; 
     draw_x = Math.round(System.currentTimeMillis() % (this.getWidth()*2)) ; 
     draw_y = Math.round(System.currentTimeMillis() % (this.getHeight()*2)) ; 
     if (draw_x>this.getWidth()){ 
      draw_x = (this.getWidth()*2)-draw_x; 
      xSpeed = rand.nextInt(10); 
      if(xSpeed >=5) 
       xSpeed=-xSpeed; 
     } 
     if (draw_y>this.getHeight()){ 
      draw_y = (this.getHeight()*2)-draw_y; 
      ySpeed = rand.nextInt(10); 
      if(ySpeed >=5) 
       ySpeed=-ySpeed; 
     } 

     //g = BitmapFactory.decodeResource(getResources(), R.drawable.ghost); 
     //canvas.drawBitmap(g, 0, 0, null); 

     a.update(canvas); 



    } 

    @Override 
    public void surfaceChanged(SurfaceHolder holder, int format, int width, 
      int height) { 
     // TODO Auto-generated method stub 
     invalidate(); 
    } 

    @Override 
    public void surfaceCreated(SurfaceHolder holder) { 
     _thread.setRunning(true); 
     _thread.start(); 

     new Cam().execute(getApplicationContext()); 
     //try { 
      //bgCamera.setPreviewDisplay(getHolder()); 
     //} catch (IOException e) { 
      // TODO Auto-generated catch block 
     // e.printStackTrace(); 
     //} 
     // bgCamera.startPreview(); 

    } 

    @Override 
    public void surfaceDestroyed(SurfaceHolder holder) { 
     boolean retry = true; 
      _thread.setRunning(false); 
      while (retry) { 
       try { 
        _thread.join(); 
        invalidate(); 
        retry = false; 
       } catch (InterruptedException e) { 
        // we will try it again and again... 
       } 
      } 

    } 


} 



} 

Ghost.java：

package com.cs461.Ian; 

import java.util.Random; 

import android.content.Context; 
import android.graphics.Bitmap; 
import android.graphics.Canvas; 
import android.graphics.Rect; 
import android.util.Log; 
import android.view.MotionEvent; 
import android.view.View; 

public class Ghost extends View implements View.OnTouchListener{ 
public Ghost(Context context) { 
    super(context); 
    // TODO Auto-generated constructor stub 
} 

private Bitmap mAnimation; 
private int mXPos; 
private int mYPos; 
private Rect mSRectangle; 
private int mSpriteHeight; 
private int mSpriteWidth; 
View v; 
Rect dest; 
int score = 0; 

/*public Ghost() { 
    mSRectangle = new Rect(0,0,0,0); 
    mXPos = 80; 
    mYPos = 200; 
}*/ 



public void Initalize(Bitmap theBitmap, int Height, int Width) { 
    mSRectangle = new Rect(0,0,0,0); 
    mXPos = 80; 
    mYPos = 200; 
    mAnimation = theBitmap; 
    mSpriteHeight = Height; 
    mSpriteWidth = Width; 
    mSRectangle.top = 0; 
    mSRectangle.bottom = mSpriteHeight; 
    mSRectangle.left = 0; 
    mSRectangle.right = mSpriteWidth; 
    dest = new Rect(mXPos, mYPos, mXPos + mSpriteWidth, 
      mYPos + mSpriteHeight); 

} 
public void draw(Canvas canvas) { 


    canvas.drawBitmap(mAnimation, mXPos, mYPos, null); 
} 

public void update(Canvas canvas) { 
    new Random(); 
    canvas.translate(1, 1); 
    mXPos = Math.round(System.currentTimeMillis() % (canvas.getWidth()*2)) ; 
    mYPos = Math.round(System.currentTimeMillis() % (canvas.getHeight()*2)) ; 
    if (mXPos>canvas.getWidth()) 
     mXPos = (canvas.getWidth()*2)-mXPos; 
    if (mYPos>canvas.getHeight()) 
     mYPos = (canvas.getHeight()*2)-mYPos; 

    draw(canvas); 


} 

public Rect getRect() { 
    return mSRectangle; 
} 
@Override 
public boolean onTouch(View v, MotionEvent event) { 
    score++; 
    //CameraActivity.t.setText("Score: "+CameraActivity.score); 
    Log.w("CLICKED","Clicked on ghost "+score+" times"); 
    return true; //doesn't work if returns false either 
} 


} 

Answer 1

嘗試釋放圖資源，每次重繪。如果是你的位圖，請致電a.release()