問題描述
為什麼 getBitmap 方法不起作用？ (Why is getBitmap method not working?)
我是 android 的菜鳥，我想使用 SD 卡中的文件設置 ImageButton 圖像。但是，getBitmap 不會創建工作位圖。當我使用剛剛創建的位圖設置 ImageButton 時，imageButton 的尺寸會發生變化，但圖像不會出現。這真是令人沮喪，非常感謝任何幫助解決這個問題。
MYCODE
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
switch (requestCode) {
case REQUEST_CODE:
// If the file selection was successful
if (resultCode == RESULT_OK) {
if (data != null) {
// Get the URI of the selected file
final Uri uri = data.getData();
try {
// Create a file instance from the URI
final File file = FileUtils.getFile(uri);
Toast.makeText(Profile_Barber.this,"File Selected: "+file.getAbsolutePath(), Toast.LENGTH_LONG).show();
Log.e("URI", uri.toString());//Returns: content://media/external/images/media/1834
Bitmap bmp = MediaStore.Images.Media.getBitmap(this.getContentResolver(), uri);
if(bmp==null){
Log.e("BMP NULL", "This that bullshit!");
}else{
Log.e("BMP NOT NULL", bmp.toString()); //Returns: BMP NOT NULL android.graphics.Bitmap@4152b5a0
profilepic.setImageBitmap(bmp);
}
} catch (Exception e) {
Log.e("FileSelectorTestActivity", "File select error", e);
e.printStackTrace();
}
}
}
break;
}
super.onActivityResult(requestCode, resultCode, data);
}
參考解法
方法 1:
How about using this to decode image?
Uri contentURI = Uri.parse(data.getDataString());
ContentResolver cr = getContentResolver();
InputStream in = cr.openInputStream(contentURI);
Bitmap pic = BitmapFactory.decodeStream(in,null,null);