回收Bitmap时报RuntimeException: Canvas: trying to use a recycled bitmap

demo_ 2012-10-30 04:29:11

在没有添加动画时，回收完全正常，打印的信息也显示Bitmap已被回收。
然而在加入动画之后：在设置好需显示的view中，还是在动画结束的监听器中释放bitmap都会报RuntimeException: Canvas: trying to use a recycled bitmap。
大家帮帮忙，看看。



package flipper.animation;



import android.app.Activity;

import android.graphics.Bitmap;

import android.graphics.BitmapFactory;

import android.graphics.Color;

import android.os.Bundle;

import android.util.Log;

import android.view.View;

import android.view.View.OnClickListener;

import android.view.animation.Animation;

import android.view.animation.Animation.AnimationListener;

import android.view.animation.RotateAnimation;

import android.view.animation.ScaleAnimation;

import android.widget.Button;

import android.widget.ImageView;

import android.widget.ViewFlipper;



public class FlipperAnimationActivity extends Activity

{

	private ViewFlipper mFlipper;

	private Button mButton;

	private boolean mIsButtonDown = false;

	private Bitmap mBitmap1 = null;

	private Bitmap mBitmap2 = null;

	

    /** Called when the activity is first created. */

    @Override

    public void onCreate(Bundle savedInstanceState)

    {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.main);

        

        mFlipper = (ViewFlipper) findViewById(R.id.flipper);

        mButton = (Button) findViewById(R.id.button);

        mButton.setOnClickListener(new ButtonListener());

        

        mFlipper.addView(addText("1", 0), 0);

        mFlipper.setDisplayedChild(0);

    }

    

    private View addText(String text, int index)

    {

    	ImageView view = new ImageView(this);

    	textAttribute(view, index);

    	return view;

    }

    

    private void textAttribute(ImageView textView, int index)

    {

    	if (index == 0)

    	{

    		textView.setBackgroundColor(Color.parseColor("#FF00FF00"));

    		mBitmap1 = BitmapFactory.decodeResource(getResources(), R.drawable.clock);

    		textView.setImageBitmap(mBitmap1);

    	}

    	else if (index == 1)

    	{

    		textView.setBackgroundColor(Color.parseColor("#FF0000FF"));

    		mBitmap2 = BitmapFactory.decodeResource(getResources(), R.drawable.icon);

    		textView.setImageBitmap(mBitmap2);

    	}

    }

    

    class ButtonListener implements OnClickListener

    {

    	private RotateAnimation rotate = new RotateAnimation(0f, 360f);

    	private ScaleAnimation scale = new  ScaleAnimation(0f, 1f, 0f, 1f, 0.5f, 0.5f);

		public void onClick(View v)

		{

			if (!mIsButtonDown)

			{

				rotate.setDuration(3000);

				scale.setDuration(1000);

//				mFlipper.setInAnimation(rotate);

//				mFlipper.setOutAnimation(scale);

				mFlipper.addView(addText("2", 1), 0);

				Log.e("----", "flipper size: " + mFlipper.getChildCount());

				mFlipper.setDisplayedChild(0);

				mFlipper.removeViewAt(1);

				Log.e("----", "flipper size: " + mFlipper.getChildCount());

				mIsButtonDown = true;

				scale.setAnimationListener(new AnimationListener() {

					

					public void onAnimationStart(Animation animation)

					{						

					}

					

					public void onAnimationRepeat(Animation animation)

					{						

					}

					

					public void onAnimationEnd(Animation animation)

					{

						Log.e("---", "recycle: " + mBitmap1.isRecycled());

						// 在此动画完成时释放，报RuntimeException: Canvas: trying to use a recycled bitmap

						// 没有添加动画情况下，正常

						mBitmap2.recycle();

						Log.e("---", "recycle: " + mBitmap1.isRecycled());

					}

				});

				Log.e("---", "recycle: " + mBitmap1.isRecycled());

				// 添加动画后就报RuntimeException: Canvas: trying to use a recycled bitmap

				// 没有添加动画情况下，正常

				mBitmap1.recycle();

				Log.e("---", "recycle: " + mBitmap1.isRecycled());

			}

			else

			{

				mFlipper.addView(addText("1", 0), 0);

				Log.e("----", "flipper size: " + mFlipper.getChildCount());

				rotate.setDuration(3000);

				scale.setDuration(1000);

//				mFlipper.setInAnimation(rotate);

//				mFlipper.setOutAnimation(scale);

				mFlipper.setDisplayedChild(0);

				mFlipper.removeViewAt(1);

				Log.e("----", "flipper size: " + mFlipper.getChildCount());

				mIsButtonDown = false;

				Log.v("---", "recycle: " + mBitmap2.isRecycled());

				// 添加动画后就报RuntimeException: Canvas: trying to use a recycled bitmap

				// 没有添加动画情况下，正常

				mBitmap2.recycle();

				Log.v("---", "recycle: " + mBitmap2.isRecycled());

			}

		}	

    }

}