[英]Display drawable exactly the size of the imageView to use as a placeholder
我檢查過的朋友可以繪制出與imageView大小完全相同的圖像,以用作占位符
但這沒有幫助我
我的問題是我想顯示一個與圖像大小完全相同的占位符
圖像大小是動態的,我從服務器獲取圖像的高度和寬度,以此來計算調整后的寬度和高度
例如,在列表的一行中,我必須顯示400 * 300的圖像尺寸,而在另一行中,我必須顯示700 * 500的圖像尺寸
現在我希望占位符在第一種情況下應填充區域400 * 300,在第二種情況下應填充700 * 500,這是我無法實現的,
我該如何實現?
mDisplayImageOptions = new DisplayImageOptions.Builder()
.resetViewBeforeLoading(true)
.imageScaleType(ImageScaleType.EXACTLY)
.showImageOnLoading(R.drawable.test_user)
.cacheInMemory(true)
.cacheOnDisk(true)
.build();
mAdjustedWidth = mWindowWidth - 10;
mAdjustedHeight = 400;
try {
int width = cursor.getInt(cursor.getColumnIndexOrThrow(TalkTable.TALK_TWIDTH));
if(width > 0) {
mAdjustedHeight = (mAdjustedWidth * cursor.getInt(cursor.getColumnIndexOrThrow(TalkTable.TALK_THEIGHT))) / width;
}
}catch (Exception ex){
ex.printStackTrace();
}
talkImageView.getLayoutParams().height = mAdjustedHeight;
talkImageView.getLayoutParams().width = mAdjustedWidth;
talkImageView.requestLayout();
mImageLoader.displayImage(talkImageThumbnil,talkImageView,mTalksDisplayImageOptions,new SimpleImageLoadingListener(){
@Override
public void onLoadingStarted(String imageUri, View view) {
// ProgressBar progressBar1 = (ProgressBar)progressBar.getTag();
//progressBar1.setVisibility(View.VISIBLE);
talkImageView.getLayoutParams().height = mAdjustedHeight;
talkImageView.getLayoutParams().width = mAdjustedWidth;
talkImageView.requestLayout();
talkImageView.setImageResource(R.drawable.image_place_holder);
Log.d(TAG, " Progress bar visisble ");
}
@Override
public void onLoadingFailed(String imageUri, View view, FailReason failReason) {
//ProgressBar progressBar1 = (ProgressBar)progressBar.getTag();
//progressBar1.setVisibility(View.GONE);
}
@Override
public void onLoadingComplete(String imageUri, View view, Bitmap loadedImage) {
//ProgressBar progressBar1 = (ProgressBar)progressBar.getTag();
//progressBar1.setVisibility(View.GONE);
}
@Override
public void onLoadingCancelled(String imageUri, View view) {
//ProgressBar progressBar1 = (ProgressBar)progressBar.getTag();
//progressBar1.setVisibility(View.GONE);
}
});
XML圖像視圖
從幾天開始我一直在為此苦苦掙扎,請幫助我
圖像下載前的占位符如下所示
圖片下載完成后,如下圖所示
我希望占位符應填充將要顯示的圖像的確切高度和寬度
將ImageView的比例類型設置為fitCenter嗎?
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