我正在尝试关注：
检查路径的代码是否已经存储在共享首选项中，如果是，则将图像设置为imageview：
sharedpreferences = getSharedPreferences(MyPREFERENCES,
Context.MODE_APPEND);
String uriImage = sharedpreferences.getString("imageUri", "");
if (!uriImage.equals(""))
{
if (Build.VERSION.SDK_INT < 19) {
//No Problem Here
}
else
{
try
{
//error occur here
parcelFileDescriptor = getContentResolver().openFileDescriptor(Uri.parse(uriImage), "r");
FileDescriptor fileDescriptor = parcelFileDescriptor.getFileDescriptor();
Bitmap image = BitmapFactory.decodeFileDescriptor(fileDescriptor);
parcelFileDescriptor.close();
fullImageView.setImageBitmap(image);
} catch (FileNotFoundException e)
{
e.printStackTrace();
} catch (IOException e)
{
e.printStackTrace();
}
}
}
来自图库的摘要图片代码：
btn.setOnClickListener(new View.OnClickListener()
{
@Override
public void onClick(View v)
{
Intent intent = new Intent(Intent.ACTION_PICK, android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
intent.setType("image/*");
intent.setAction(Intent.ACTION_GET_CONTENT);
startActivityForResult(Intent.createChooser(intent,
"Select Picture"), SELECT_PICTURE);
}
});
图库的OnActivityResult代码
@SuppressLint("NewApi")
protected void onActivityResult(int requestCode, int resultCode,
Intent intent) {
super.onActivityResult(requestCode, resultCode, intent);
if (resultCode == RESULT_OK) {
if (requestCode == SELECT_PICTURE) {
Uri selectedImageUri = intent.getData();
String a = selectedImageUri.getPath();
if (Build.VERSION.SDK_INT < 19) {
try
{
String imageUri = selectedImageUri.toString();
parcelFileDescriptor = getContentResolver().openFileDescriptor(selectedImageUri, "r");
FileDescriptor fileDescriptor = parcelFileDescriptor.getFileDescriptor();
Bitmap image = BitmapFactory.decodeFileDescriptor(fileDescriptor);
parcelFileDescriptor.close();
fullImageView.setImageBitmap(image);
catDialog.dismiss();
editor = sharedpreferences.edit();
editor.putString("imageUri", imageUri);
editor.commit();
editor.remove("AvailImagePath").commit();
} catch (FileNotFoundException e)
{
e.printStackTrace();
} catch (IOException e)
{
e.printStackTrace();
}
}
else
{
try
{
String imageUri = selectedImageUri.toString();
parcelFileDescriptor = getContentResolver().openFileDescriptor(selectedImageUri, "r");
FileDescriptor fileDescriptor = parcelFileDescriptor.getFileDescriptor();
Bitmap image = BitmapFactory.decodeFileDescriptor(fileDescriptor);
parcelFileDescriptor.close();
fullImageView.setImageBitmap(image);
editor = sharedpreferences.edit();
editor.putString("imageUri", imageUri);
editor.commit();
editor.remove("AvailImagePath").commit();
} catch (FileNotFoundException e)
{
e.printStackTrace();
} catch (IOException e)
{
e.printStackTrace();
}
}
}
}
}
清单中的权限：
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.MANAGE_DOCUMENTS" />
以上代码在旧版本中正常工作但问题仅在kitkat中出现
挑选图片时没有问题....它工作正常。
当我使用共享首选项值来设置图片时出现问题：当应用程序重新启动时
日志显示一些安全级别异常。
LOG：
10-01 14:44:01.750: D/AndroidRuntime(31363): Shutting down VM
10-01 14:44:01.750: W/dalvikvm(31363): threadid=1: thread exiting with uncaught exception (group=0x41fdad40)
10-01 14:44:01.752: E/AndroidRuntime(31363): FATAL EXCEPTION: main
10-01 14:44:01.752: E/AndroidRuntime(31363): Process: com.example.changeimage, PID: 31363
10-01 14:44:01.752: E/AndroidRuntime(31363): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.changeimage/com.example.changeimage.MainActivity}: java.lang.SecurityException: No permission grant found for UID 10146 and Uri content://com.android.providers.media.documents/document/image:5304
10-01 14:44:01.752: E/AndroidRuntime(31363): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2198)
10-01 14:44:01.752: E/AndroidRuntime(31363): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2257)
10-01 14:44:01.752: E/AndroidRuntime(31363): at android.app.ActivityThread.access$800(ActivityThread.java:139)
10-01 14:44:01.752: E/AndroidRuntime(31363): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1210)
10-01 14:44:01.752: E/AndroidRuntime(31363): at android.os.Handler.dispatchMessage(Handler.java:102)
10-01 14:44:01.752: E/AndroidRuntime(31363): at android.os.Looper.loop(Looper.java:136)
10-01 14:44:01.752: E/AndroidRuntime(31363): at android.app.ActivityThread.main(ActivityThread.java:5086)
10-01 14:44:01.752: E/AndroidRuntime(31363): at java.lang.reflect.Method.invokeNative(Native Method)
10-01 14:44:01.752: E/AndroidRuntime(31363): at java.lang.reflect.Method.invoke(Method.java:515)
10-01 14:44:01.752: E/AndroidRuntime(31363): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:785)
10-01 14:44:01.752: E/AndroidRuntime(31363): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:601)
10-01 14:44:01.752: E/AndroidRuntime(31363): at dalvik.system.NativeStart.main(Native Method)
10-01 14:44:01.752: E/AndroidRuntime(31363): Caused by: java.lang.SecurityException: No permission grant found for UID 10146 and Uri content://com.android.providers.media.documents/document/image:5304
10-01 14:44:01.752: E/AndroidRuntime(31363): at android.os.Parcel.readException(Parcel.java:1465)
10-01 14:44:01.752: E/AndroidRuntime(31363): at android.os.Parcel.readException(Parcel.java:1419)
10-01 14:44:01.752: E/AndroidRuntime(31363): at android.app.ActivityManagerProxy.takePersistableUriPermission(ActivityManagerNative.java:3526)
10-01 14:44:01.752: E/AndroidRuntime(31363): at android.content.ContentResolver.takePersistableUriPermission(ContentResolver.java:1641)
10-01 14:44:01.752: E/AndroidRuntime(31363): at com.example.changeimage.MainActivity.onCreate(MainActivity.java:206)
10-01 14:44:01.752: E/AndroidRuntime(31363): at android.app.Activity.performCreate(Activity.java:5248)
10-01 14:44:01.752: E/AndroidRuntime(31363): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1110)
10-01 14:44:01.752: E/AndroidRuntime(31363): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2162)
10-01 14:44:01.752: E/AndroidRuntime(31363): ... 11 more
10-01 14:44:08.608: I/Process(31363): Sending signal. PID: 31363 SIG: 9