与Glide

时间:2016-02-25 11:01:54

标签: android multithreading android-espresso android-glide

我想写一个Espresso matcher来验证`ImageView'是否有特定的位图设置。由于应用程序通过Glide进行图像加载,我认为在实际比较预期位图和实际位图之前,我必须在测试方面做同样的事情来考虑裁剪/居中。

这是我到目前为止所提出的:

BitmapRequestBuilder<Uri, Bitmap> bitmapRequest = Glide.with(imageView.getContext())
        .load(Uri.parse("file:///android_asset/" + mPath))
        .asBitmap();

switch (imageView.getScaleType()) {
    case CENTER_CROP:
        bitmapRequest.centerCrop();
        break;
    case FIT_CENTER:
    case FIT_START:
    case FIT_END:
        bitmapRequest.fitCenter();
        break;
    default:
        // no scaling applied to the ImageView under test
}

AtomicReference<Bitmap> bmRef = new AtomicReference<>();
bitmapRequest.into(new SimpleTarget<Bitmap>(
            imageView.getMeasuredWidth(), 
            imageView.getMeasuredHeight()
) {
    @Override
    public void onResourceReady(Bitmap resource, GlideAnimation<? super Bitmap> glideAnimation) {
        bmRef.set(resource);
    }
});

// ???

try {
    Bitmap expected = bmRef.get();
    return expected.sameAs(bitmap);
} catch (Exception e) {
    throw new IllegalStateException("could not load asset " + mPath, e);
}

现在这里的问题当然是我遇到了僵局。我在主线程上(匹配器在主线程IIRC上执行)并且Glide想要一个后端线程来加载位图,然后在主线程(在'onResourceReady')本身返回。所以我需要从外面等待内部发布的结果,同时保持主线程运行。

我(未成功)尝试通过Looper.loop()中的// ???推进当前循环器,并尝试了常规锁定/等待方法,但没有任何效果。我没有想法......

2 个答案:

答案 0 :(得分:-2)

对于这样的情况,我使用简单的select conversionid from conversationMembers group by conversionid having sum(userId = 2) > 0 and sum(userId = 7) > 0 and count(distinct userId) = 2; ,这不是最好的选择,但它对我有用。

sleep

答案 1 :(得分:-2)

这样做的一种方法是将比较逻辑保存在onResourceReady中, 然后,如果您正在使用任何事件总线,则使用结果触发事件,并将UI逻辑放入订阅此事件的方法中。如果没有使用任何事件总线,则LocalBroadcastManager广播结果。

例如:

private BroadcastReceiver receiver;

private void doWhateverYouWantWithResult(boolean result) {

}

bitmapRequest.into(new SimpleTarget<Bitmap>(
            imageView.getMeasuredWidth(), 
            imageView.getMeasuredHeight()
) {
    @Override
    public void onResourceReady(Bitmap resource, GlideAnimation<? super Bitmap> glideAnimation) {
        bmRef.set(resource);
        Bitmap expected = resource;
        boolean result = expected.sameAs(bitmap);
        Intent localIntent =
                new Intent(BROADCAST_ACTION)
                        // Puts the status into the Intent
                        .putExtra(MATCH_RESULT, result);
        // Broadcasts the Intent to receivers in this app.
        LocalBroadcastManager.getInstance(this).sendBroadcast(localIntent);
    }
});


    @Override
    public void onResume(){
        super.onResume();
        receiver = new BroadcastReceiver() {
            @Override
            public void onReceive(Context context, Intent intent) {
                boolean result = intent.getBooleanExtra(MATCH_RESULT);
                doWhateverYouWantWithResult(result);
            }
        };
        LocalBroadcastManager.getInstance(getContext())
                .registerReceiver(receiver, new IntentFilter(BROADCAST_ACTION));
    }

    @Override
    public void onPause(){
        super.onPause();
        LocalBroadcastManager.getInstance(getContext()).unregisterReceiver(receiver);
    }