我想在片段中选择图库意图。当用户选择选项从图库中选择图像然后图库打开并立即调用片段的onActivityResult时。当用户选择图像时，则不调用onActivityResult（）。所以我不是能够从图库中选择图像。 Belo是我打开画廊的代码 -
Intent intent = new Intent(Intent.ACTION_PICK,android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
intent.setType("video/, images/");
startActivityForResult(intent, 2);
这是我的onActivityResult -
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
Log.d(TAG, "onActivityResult"); // not printed
Toast.makeText(mContext, "aaaa"+requestCode, Toast.LENGTH_SHORT).show();
}
我的代码中出现了什么问题。
提前致谢。
答案 0 :(得分：2)
使用它打开android image chooser：
if (Build.VERSION.SDK_INT < Build.VERSION_CODES.KITKAT) {
Intent intent = new Intent();
intent.setType("image/*");
intent.setAction(Intent.ACTION_GET_CONTENT);
startActivityForResult(Intent.createChooser(intent, "Select Picture"), GALLERY_INTENT_CALLED);
} else {
Intent intent = new Intent(Intent.ACTION_OPEN_DOCUMENT);
intent.addCategory(Intent.CATEGORY_OPENABLE);
intent.setType("image/*");
startActivityForResult(intent, GALLERY_KITKAT_INTENT_CALLED);
}
并且onActivityResult使用此：
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
Cursor cursor = null;
if (resultCode != Activity.RESULT_OK)
return;
if (data == null)
return;
Uri originalUri = null;
if (requestCode == GALLERY_INTENT_CALLED && data != null) {
originalUri = data.getData();
String[] filePathColumn = {MediaStore.Images.Media.DATA};
cursor = getActivity().getContentResolver().query(originalUri,
filePathColumn, null, null, null);
cursor.moveToFirst();
int columnIndex = cursor.getColumnIndex(filePathColumn[0]);
filePath = cursor.getString(columnIndex);
cursor.close();
Log.d("path of uri", filePath);
} else if (requestCode == GALLERY_KITKAT_INTENT_CALLED && data != null) {
originalUri = data.getData();
final int takeFlags = data.getFlags()
& (Intent.FLAG_GRANT_READ_URI_PERMISSION | Intent.FLAG_GRANT_WRITE_URI_PERMISSION);
// Check for the freshest data.
getActivity().getContentResolver().takePersistableUriPermission(
originalUri, takeFlags);
Log.d("Uri: ", originalUri.toString());
filePath = getPath(getActivity(), originalUri);
Log.d("filepath", filePath);
}
}
@SuppressLint("NewApi")
public static String getPath(final Context context, final Uri uri) {
final boolean isKitKat = Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT;
// DocumentProvider
if (isKitKat && DocumentsContract.isDocumentUri(context, uri)) {
// ExternalStorageProvider
if (isExternalStorageDocument(uri)) {
final String docId = DocumentsContract.getDocumentId(uri);
final String[] split = docId.split(":");
final String type = split[0];
if ("primary".equalsIgnoreCase(type)) {
return Environment.getExternalStorageDirectory() + "/"
+ split[1];
}
// TODO handle non-primary volumes
}
// DownloadsProvider
else if (isDownloadsDocument(uri)) {
final String id = DocumentsContract.getDocumentId(uri);
final Uri contentUri = ContentUris.withAppendedId(
Uri.parse("content://downloads/public_downloads"),
Long.valueOf(id));
return getDataColumn(context, contentUri, null, null);
}
// MediaProvider
else if (isMediaDocument(uri)) {
final String docId = DocumentsContract.getDocumentId(uri);
final String[] split = docId.split(":");
final String type = split[0];
Uri contentUri = null;
if ("image".equals(type)) {
contentUri = MediaStore.Images.Media.EXTERNAL_CONTENT_URI;
} else if ("video".equals(type)) {
contentUri = MediaStore.Video.Media.EXTERNAL_CONTENT_URI;
} else if ("audio".equals(type)) {
contentUri = MediaStore.Audio.Media.EXTERNAL_CONTENT_URI;
}
final String selection = "_id=?";
final String[] selectionArgs = new String[]{split[1]};
return getDataColumn(context, contentUri, selection,
selectionArgs);
}
}
// MediaStore (and general)
else if ("content".equalsIgnoreCase(uri.getScheme())) {
return getDataColumn(context, uri, null, null);
}
// File
else if ("file".equalsIgnoreCase(uri.getScheme())) {
return uri.getPath();
}
return null;
}
/**
* Get the value of the data column for this Uri. This is useful for
* MediaStore Uris, and other file-based ContentProviders.
*
* @param context The context.
* @param uri The Uri to query.
* @param selection (Optional) Filter used in the query.
* @param selectionArgs (Optional) Selection arguments used in the query.
* @return The value of the _data column, which is typically a file path.
*/
public static String getDataColumn(Context context, Uri uri,
String selection, String[] selectionArgs) {
Cursor cursor = null;
final String column = "_data";
final String[] projection = {column};
try {
cursor = context.getContentResolver().query(uri, projection,
selection, selectionArgs, null);
if (cursor != null && cursor.moveToFirst()) {
final int column_index = cursor.getColumnIndexOrThrow(column);
return cursor.getString(column_index);
}
} finally {
if (cursor != null)
cursor.close();
}
return null;
}
/**
* @param uri The Uri to check.
* @return Whether the Uri authority is ExternalStorageProvider.
*/
public static boolean isExternalStorageDocument(Uri uri) {
return "com.android.externalstorage.documents".equals(uri.getAuthority());
}
/**
* @param uri The Uri to check.
* @return Whether the Uri authority is DownloadsProvider.
*/
public static boolean isDownloadsDocument(Uri uri) {
return "com.android.providers.downloads.documents".equals(uri.getAuthority());
}
/**
* @param uri The Uri to check.
* @return Whether the Uri authority is MediaProvider.
*/
public static boolean isMediaDocument(Uri uri) {
return "com.android.providers.media.documents".equals(uri.getAuthority());
}
答案 1 :(得分：1)
＃我正在向您展示我使用ImageView显示图像结果的示例。使用了两种方法1.从相机和2.从SD卡＃
public void camera(View view) {
Log.i("SonaSys", "startCameraActivity()");
File file = new File(path);
Uri outputFileUri = Uri.fromFile(file);
Intent intent = new Intent(
android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
intent.putExtra(MediaStore.EXTRA_OUTPUT, outputFileUri);
startActivityForResult(intent, 0);
}
public void gallery(View view) {
String path = Environment.getExternalStorageDirectory()
+ "/images/imagename.jpg";
Intent i = new Intent(Intent.ACTION_PICK,
android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
startActivityForResult(i, RESULT_LOAD_IMAGE);
}
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, 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();
bitmap = BitmapFactory.decodeFile(picturePath);
image.setImageBitmap(bitmap);
if (bitmap != null) {
ImageView rotate = (ImageView) findViewById(R.id.rotate);
rotate.setVisibility(View.VISIBLE);
}
} else {
Log.i("SonaSys", "resultCode: " + resultCode);
switch (resultCode) {
case 0:
Log.i("SonaSys", "User cancelled");
break;
case -1:
onPhotoTaken();
break;
}
}
}
protected void onPhotoTaken() {
// Log message
Log.i("SonaSys", "onPhotoTaken");
taken = true;
imgCapFlag = true;
BitmapFactory.Options options = new BitmapFactory.Options();
options.inSampleSize = 4;
bitmap = BitmapFactory.decodeFile(path, options);
image.setImageBitmap(bitmap);
}
答案 2 :(得分：0)
使用此代码选择图片，
Intent intent = new Intent();
intent.setType("image/*");
intent.setAction(Intent.ACTION_GET_CONTENT);
startActivityForResult(Intent.createChooser(intent, "Select image"),
PICK_IMAGE);
由于Activity获取onActivityResult（）的结果，您需要覆盖活动的onActivityResult（）并调用super.onActivityResult（）以传播到未处理的结果代码或所有的相应片段。
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
}
答案 3 :(得分：0)
为了帮助那些正在努力解决这个问题的人，我建议如下：
如果您的活动的启动模式是“singleInstance” 在这种情况下，一旦你离开活动就会自动调用onActivityResult并进入你应该选择图像的活动。对于相机意图也是如此。尝试将您的启动模式更改为“singleTop”或其他任何内容，以替代您现在拥有的启动模式。这样，只有在完成拾取图像时才会调用activityOnResult。此外，结果将仅从您调用startActivityForResult的位置返回到片段。我建议你考虑实施dialogFragment，为用户提供选择图片或点击图片的选项
另一个有趣的事情，如果你使用片段的本地上下文从片段调用你的startActivityResult，结果将返回到片段，但如果你使用像getActivity（）这样的片段活动上下文来调用它.startActivityResult结果将被传递回父片段活动。所以这取决于你想要处理它的位置。 其他重要的事情，请致电
super.onActivityResult（requestCode，resultCode，data）;
在您获得结果的方法中。 除了这些之外，请尝试遵循其他人提供的使用正确意图挑选图像的建议。