Android攝像機(jī)：數(shù)據(jù)意圖返回空我有一個(gè)Android應(yīng)用程序，它包含多個(gè)活動(dòng)。在其中一種情況下，我使用一個(gè)按鈕來(lái)調(diào)用設(shè)備攝像機(jī)：public void onClick(View view) {
Intent photoIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
startActivityForResult(photoIntent, IMAGE_CAPTURE);}在相同的活動(dòng)中，我稱之為OnActivityResult方法獲取圖像結(jié)果：@Overrideprotected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (requestCode == IMAGE_CAPTURE) {
if (resultCode == RESULT_OK) {
Bitmap image = (Bitmap) data.getExtras().get("data");
ImageView imageview = (ImageView) findViewById(R.id.pic);
imageview.setImageBitmap(image);
} else if (resultCode == RESULT_CANCELED) {
Toast.makeText(this, "CANCELED ", Toast.LENGTH_LONG).show();
}
}}問題是data為空，而OnActivityResult方法直接轉(zhuǎn)到(resultCode == RESULT_CANCELED)并且應(yīng)用程序返回到以前的avtivity。如何解決此問題，并且在調(diào)用攝像機(jī)之后，應(yīng)用程序返回到當(dāng)前活動(dòng)，其中包含ImageView哪個(gè)將包含拍攝的照片？謝謝
3 回答
慕妹3146593
TA貢獻(xiàn)1820條經(jīng)驗(yàn) 獲得超9個(gè)贊
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private void openCameraForResult(int requestCode){
Intent photo = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
Uri uri = Uri.parse("file:///sdcard/photo.jpg");
photo.putExtra(android.provider.MediaStore.EXTRA_OUTPUT, uri);
startActivityForResult(photo,requestCode);}if (requestCode == CAMERA_REQUEST_CODE) {
if (resultCode == Activity.RESULT_OK) {
File file = new File(Environment.getExternalStorageDirectory().getPath(), "photo.jpg");
Uri uri = Uri.fromFile(file);
Bitmap bitmap;
try {
bitmap = MediaStore.Images.Media.getBitmap(getContentResolver(), uri);
bitmap = crupAndScale(bitmap, 300); // if you mind scaling
pofileImageView.setImageBitmap(bitmap);
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}public static Bitmap crupAndScale (Bitmap source,int scale){
int factor = source.getHeight() <= source.getWidth() ? source.getHeight(): source.getWidth();
int longer = source.getHeight() >= source.getWidth() ? source.getHeight(): source.getWidth();
int x = source.getHeight() >= source.getWidth() ?0:(longer-factor)/2;
int y = source.getHeight() <= source.getWidth() ?0:(longer-factor)/2;
source = Bitmap.createBitmap(source, x, y, factor, factor);
source = Bitmap.createScaledBitmap(source, scale, scale, false);
return source;}- 3 回答
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