我试图创建一个ImageSwitcher来浏览DCIM上的摄像机图像。浏览图像时,出现OutOfMemory错误。如果正在为查看的每个较大图像分配内存,则这是完全合理的。我研究了其他类似的问题,但是当我切换到新图像时,我无法弄清楚如何释放旧图像的内存。
public class MainActivity extends ActionBarActivity {
private ImageView imageView;
private ImageSwitcher imageSwitcher;
private String imageDir;
private File imageFile;
private String[] imageNames;
private int i;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
imageSwitcher = (ImageSwitcher)findViewById(R.id.imageSwitcher1);
imageDir = getString(R.string.image_dir);
imageFile = new File(imageDir);
imageNames = imageFile.list();
i = imageNames.length - 1;
imageSwitcher.setFactory(new ViewFactory() {
@TargetApi(Build.VERSION_CODES.HONEYCOMB)
@Override
public View makeView() {
// I tried testing for null here but that doesn't work
imageView = new ImageView(getApplicationContext());
imageView.setScaleType(ImageView.ScaleType.FIT_CENTER);
imageView.setLayoutParams(new
ImageSwitcher.LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT));
return imageView;
}
});
}
public void previous(View view) {
Animation in = AnimationUtils.loadAnimation(this, android.R.anim.slide_out_right);
Animation out = AnimationUtils.loadAnimation(this, android.R.anim.slide_in_left);
imageSwitcher.setInAnimation(out);
imageSwitcher.setOutAnimation(in);
Uri imageUri = Uri.parse(imageDir+"/"+imageNames[i]);
imageSwitcher.setImageURI(imageUri);
decrementImage();
}
public void decrementImage() {
if (i == 0) {
i = imageNames.length - 1;
} else {
i--;
}
}
}
最佳答案
解:
public void previous(View view) {
Animation in = AnimationUtils.loadAnimation(this, android.R.anim.slide_out_right);
Animation out = AnimationUtils.loadAnimation(this, android.R.anim.slide_in_left);
imageSwitcher.setInAnimation(out);
imageSwitcher.setOutAnimation(in);
Uri imageUri = Uri.parse(imageDir+"/"+imageNames[i]);
imageSwitcher.setImageURI(null); // THIS FIXED THE OOM ERROR
imageSwitcher.setImageURI(imageUri);
decrementImage();
}
关于java - Android ImageSwitcher OutOfMemoryError,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/23530097/