我有一个应用程序,它有一个按钮可以从您的图库中选择一张照片,它工作正常,在选择图像后我的应用程序显示返回 Activity 并在 ImageView 中显示图像。
一切正常,但有时,当我选择某些特定图像时,预览不显示。我也尝试过压缩图像,但仍然无法正常工作
我的代码如下..
在onCreate()
galeryBtn=(Button)findViewById(R.id.buttonGallery);
galeryBtn.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
Intent i = new Intent(Intent.ACTION_PICK, android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
startActivityForResult(i, RESULT_LOAD_IMAGE);
}
});
在onActivityResult(int requestCode, int resultCode, Intent data)
if (requestCode == RESULT_LOAD_IMAGE && resultCode == RESULT_OK && null != data) {
Uri selectedImage = data.getData();
String[] filePathColumn = { MediaStore.Images.Media.DATA };
Cursor cursor = getContentResolver().query(selectedImage,filePathColumn, null, null, null);
cursor.moveToFirst();
int columnIndex = cursor.getColumnIndex(filePathColumn[0]);
String picturePath = cursor.getString(columnIndex);
cursor.close();
// String picturePath contains the path of selected Image
// Show the Selected Image on ImageView
ImageView imageView = (ImageView) findViewById(R.id.imgView);
imageView.setImageBitmap(BitmapFactory.decodeFile(picturePath));
}
最佳答案
这样试试
public void onActivityResult(int requestCode, int resultCode, Intent intent) {
super.onActivityResult(requestCode, resultCode, intent);
switch (requestCode) {
case RESULT_LOAD_IMAGE:
if (resultCode == Activity.RESULT_OK) {
Uri selectedImage = intent.getData();
try {
Bitmap bitmapImage =decodeBitmap(selectedImage );
} catch (FileNotFoundException e) {
e.printStackTrace();
}
// Show the Selected Image on ImageView
ImageView imageView = (ImageView) findViewById(R.id.imgView);
imageView.setImageBitmap(bitmapImage);
}
和
public Bitmap decodeBitmap(Uri selectedImage) throws FileNotFoundException {
BitmapFactory.Options o = new BitmapFactory.Options();
o.inJustDecodeBounds = true;
BitmapFactory.decodeStream(getContentResolver().openInputStream(selectedImage), null, o);
final int REQUIRED_SIZE = 100;
int width_tmp = o.outWidth, height_tmp = o.outHeight;
int scale = 1;
while (true) {
if (width_tmp / 2 < REQUIRED_SIZE || height_tmp / 2 < REQUIRED_SIZE) {
break;
}
width_tmp /= 2;
height_tmp /= 2;
scale *= 2;
}
BitmapFactory.Options o2 = new BitmapFactory.Options();
o2.inSampleSize = scale;
return BitmapFactory.decodeStream(getContentResolver().openInputStream(selectedImage), null, o2);
}
关于android - 从图库中挑选照片并在 ImageView 中显示,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/21136311/