相关疑难解决方法(0)

我在Android的编程新和我,说我的应用程序运行的内存,这所示例我从一本书上抄,它正在与小图片的分辨率,但一个错误,当我加了几张照片具有更大的分辨率出来出现内存错误,可能是我做错了或者只是不知道我还应该使用图像,如果有人知道我应该改变什么,以便这个错误不再出现,请求帮助.谢谢期待!

源代码:

public class ImageViewsActivity extends Activity {
//the images to display
Integer[] imageIDs={
        R.drawable.pic1,
        R.drawable.pic2,
        R.drawable.pic3,
        R.drawable.pic4,
        R.drawable.pic5
};  
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);

    final ImageView iv=(ImageView) findViewById(R.id.image1);

    Gallery gallery=(Gallery) findViewById(R.id.gallery);
    gallery.setAdapter(new ImageAdapter(this));
  gallery.setOnItemClickListener(new OnItemClickListener(){
        public void onItemClick(AdapterView<?> parent, View v, int position, long id){
            Toast.makeText(getBaseContext(), "pic"+(position+1)+" selected", Toast.LENGTH_SHORT).show();

            //display the image selected
            try{iv.setScaleType(ImageView.ScaleType.FIT_CENTER);
              iv.setImageResource(imageIDs[position]);}catch(OutOfMemoryError e){
                     iv.setImageBitmap(null);
                }
        }
    });


}

public class ImageAdapter extends BaseAdapter{
    private …

假设我的代码类似于下面的代码:

protected void onCreate(Bundle bundle){

    this.imageView = (ImageView) contentView.findViewById(R.id.imageView);

    this.setFirstBitmap();
    this.setSecondBitmap();
}

private setFirstBitmap(){
    Bitmap bitmap1 = BitmapFactory.decodeFile(bitmapFile1);
    imageView.setImageBitmap(bitmap1);
}

private setSecondBitmap(){
    Bitmap bitmap2 = BitmapFactory.decodeFile(bitmapFile2);
    imageView.setImageBitmap(bitmap2);
}

在这种情况下,imageView回收bitmap1还是我必须在设置bitmap2之前做到这一点？

我正在创建一个RecyclerView显示图片网格.选择其中一个时,它应该打开一个带有转换的新活动.

我正在使用Glide库加载图片,过渡看起来很糟糕,因为它重新加载了新活动中的图片.所以我不得不将它保存在缓存中,然后将其用于转换.

我有代码,但有时如果图片没有加载,它会抛出Canvas RuntimeException.

这是日志:

07-03 15:19:58.633  28461-28461/jahirfiquitiva.project E/AndroidRuntime? FATAL EXCEPTION: main
    Process: jahirfiquitiva.project, PID: 28461
    java.lang.RuntimeException: Canvas: trying to use a recycled bitmap android.graphics.Bitmap@29f09d20
            at android.graphics.Canvas.throwIfCannotDraw(Canvas.java:1282)
            at android.view.GLES20Canvas.drawBitmap(GLES20Canvas.java:599)
            at android.graphics.drawable.BitmapDrawable.draw(BitmapDrawable.java:538)
            at android.widget.ImageView.onDraw(ImageView.java:1176)
            at android.view.View.draw(View.java:15239)
            at android.view.View.updateDisplayListIfDirty(View.java:14175)
            at android.view.View.getDisplayList(View.java:14197)
            at android.view.GhostView.onDraw(GhostView.java:52)
            at android.view.View.draw(View.java:15239)
            at android.view.View.updateDisplayListIfDirty(View.java:14175)
            at android.view.View.getDisplayList(View.java:14197)
            at android.view.View.draw(View.java:14967)
            at android.view.ViewGroup.drawChild(ViewGroup.java:3406)
            at android.view.ViewGroup.dispatchDraw(ViewGroup.java:3199)
            at android.view.View.updateDisplayListIfDirty(View.java:14170)
            at android.view.View.getDisplayList(View.java:14197)
            at android.view.View.draw(View.java:14967)
            at android.view.ViewGroup.drawChild(ViewGroup.java:3406)
            at android.view.ViewGroup.dispatchDraw(ViewGroup.java:3199)
            at android.view.ViewOverlay$OverlayViewGroup.dispatchDraw(ViewOverlay.java:219)
            at android.view.View.draw(View.java:15248)
            at android.widget.FrameLayout.draw(FrameLayout.java:598)
            at com.android.internal.policy.impl.PhoneWindow$DecorView.draw(PhoneWindow.java:2906)
            at android.view.View.updateDisplayListIfDirty(View.java:14175)
            at android.view.View.getDisplayList(View.java:14197)
            at android.view.ThreadedRenderer.updateViewTreeDisplayList(ThreadedRenderer.java:273)
            at …

这个问题与我们是否必须明确地回收位图有关,如果我们不需要它？.

有一个ImageView有一个drawable,当用户点击一个按钮时,它会为ImageView分配一个新的drawable.

我们是否必须销毁属于ImageView的旧drawable,以及如何？

Drawable oriDrawable = imageView.getDrawable()

// set callback to null
oriDrawable.setCallback(null);

// get the bitmap and recycle it
((BitmapDrawable)oriDrawable).getBitmap().recycle();

上面的代码是否正确？什么是最好的解决方案？