我想使用 Glide 库 代替 Universal Image Loader,但是在共享元素过渡方面遇到了问题。
我创建了一个简单的沙盒,并使用 UIL 创建了以下过渡效果:https://dl.dropboxusercontent.com/u/97787025/device-2015-06-18-113333.mp4
非常简单,而且运行良好。但当我使用 Glide 时,它看起来不太好:https://dl.dropboxusercontent.com/u/97787025/device-2015-06-18-114508.mp4
这是我正在使用的代码:
第一个活动:
public class MainActivity extends BaseActivity {
@Override
public void onCreate(Bundle bundle) {
super.onCreate(bundle);
setContentView(R.layout.main);
final ImageView iv = (ImageView) findViewById(R.id.main_image);
displayImageGlide(BaseActivity.IMAGE_URL, iv, true);
Button button = (Button) findViewById(R.id.main_button);
button.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent intent = new Intent(getApplicationContext(), DifferentActivity.class);
startActivity(intent, iv);
}
});
}
}
还有第二个:
public class DifferentActivity extends BaseActivity {
@Override
public void onCreate(Bundle bundle) {
super.onCreate(bundle);
setContentView(R.layout.different);
ImageView imageView = (ImageView) findViewById(R.id.diff_image);
displayImageGlide(BaseActivity.IMAGE_URL, imageView, false);
}
}
BaseActivity 只包含 displayImageGlide
public void displayImageGlide(String url, ImageView imageView) {
Glide.with(this).load(url)
.asBitmap().transform(new CustomTransformation(this))
.skipMemoryCache(true)
.diskCacheStrategy(DiskCacheStrategy.SOURCE)
.into(imageView);
}
private static class CustomTransformation extends BitmapTransformation {
public CustomTransformation(Context context) {
super(context);
}
@Override
protected Bitmap transform(BitmapPool pool, Bitmap toTransform, int outWidth, int outHeight) {
return bitmapChanger(toTransform, outWidth, outHeight);
}
@Override
public String getId() {
return "some_id_1";
}
}
private static Bitmap bitmapChanger(Bitmap bitmap, int desiredWidth, int desiredHeight) {
float originalWidth = bitmap.getWidth();
float originalHeight = bitmap.getHeight();
float scaleX = desiredWidth / originalWidth;
float scaleY = desiredHeight / originalHeight;
//Use the larger of the two scales to maintain aspect ratio
float scale = Math.max(scaleX, scaleY);
Matrix matrix = new Matrix();
matrix.setScale(scale, scale);
//If the scaleY is greater, we need to center the image
if(scaleX < scaleY) {
float tx = (scale * originalWidth - desiredWidth) / 2f;
matrix.postTranslate(-tx, 0f);
}
Bitmap result = Bitmap.createBitmap(desiredWidth, desiredHeight, bitmap.getConfig() != null ? bitmap.getConfig() : Bitmap.Config.ARGB_8888);
Canvas canvas = new Canvas(result);
canvas.drawBitmap(bitmap, matrix, new Paint());
return result;
}
我试过从Glide Builder中删除缓存行(用于防止对我正在调整的内容进行缓存),但这并没有帮助。很想采用Glide,但如果这样行不通,那就有些破坏协议了。如果有人有一些建议,那我会非常感谢,谢谢!
android:scaleType="centerCrop"
不就可以解决问题了吗? - Markus Rubey