我的应用有可能更改用户头像(后者将其上传到网络服务)。但是在某些设备上,Cropper(" com.android.camera.action.CROP" Intent)启动,但返回null Uri。你能指出我做错了吗?
第一位用户选择照片:
public static void pickPhoto(final Context context) {
Intent pickImageIntent = new Intent(Intent.ACTION_GET_CONTENT);
pickImageIntent.setType("image/*");
((ActionBarActivity) context).startActivityForResult(Intent.createChooser(pickImageIntent, "Select Avatar"), SettingsActivity.REQUEST_CODE_PICK_AVATAR);
}
然后在活动获得RESULT_OK(选择图像uri)后 - 它开始裁剪:
public static void startCropper(final Context context, final Uri imageToCrop) {
final Intent intent = new Intent("com.android.camera.action.CROP");
intent.setData(imageToCrop);
intent.putExtra("outputX", 200);
intent.putExtra("outputY", 200);
intent.putExtra("aspectX", 1);
intent.putExtra("aspectY", 1);
intent.putExtra("scale", true);
intent.putExtra("noFaceDetection", true);
intent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(getTempFile(context)));
intent.putExtra("return-data", true);
((ActionBarActivity) context).startActivityForResult(intent, SettingsActivity.REQUEST_CODE_CROP_AVATAR);
}
返回带有null getData()的RESULT_OK:
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (requestCode == REQUEST_CODE_CROP_AVATAR && resultCode == RESULT_OK) {
Uri uri = data.getData(); // uri is null on some devices
}
}
我的getTempFile方法:
public static File getTempFile(Context context) {
File cacheDir;
if (!Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {
cacheDir = context.getCacheDir();
} else {
cacheDir = context.getExternalCacheDir();
}
File file = new File(cacheDir, "temp_avatar.jpg");
try {
file.createNewFile();
} catch (IOException e) {
}
return file;
}
答案 0 :(得分:2)
正如greenapps在问题评论中所提到的,如果uri为null,则需要在 onActivityResult()中进行额外检查,然后再使用getExtra(“data”),如下所示:
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (requestCode == REQUEST_CODE_CROP_AVATAR && resultCode == RESULT_OK) {
Uri uri = data.getData();
if (null != uri) {
// do something with uri
} else {
Bitmap bitmap = data.getExtra("data");
// get uri from bitmap and do something with uri
}
}
}
在我的应用中测试代码并且工作正常。