MediaStore.Images.Media.insertImage在某些设备中返回null

可能重复但未找到任何解决方案。MediaStore.Images.Media.insertImage在某些设备中返回null

我想修改图像并使用MediaStore将其保存到设备。用下面的代码 - :

public class Utils { 

private Utils() {

}

static Uri getUri(Context context, Bitmap bitmap) {

ByteArrayOutputStream bytes = new ByteArrayOutputStream();

bitmap.compress(Bitmap.CompressFormat.JPEG, 100, bytes);

String path = MediaStore.Images.Media.insertImage(context.getContentResolver(), bitmap, "Title", null); //returning null in some devices

Log.d("TAG", "getUri: "+path);

return Uri.parse(path); //this is returning null which cause the app crash

}

static Bitmap getBitmap(Context context, Uri uri) throws IOException {

return MediaStore.Images.Media.getBitmap(context.getContentResolver(), uri);

}

}

此代码是在大多数设备的工作很好,但问题是,在MediaStore.Images.Media.insertImage像一些设备返回null - :

。三星J7(2016)

。 LG Magna LTE

。 Android模拟器API 21

我很惊讶这个应用程序工作在Android模拟器API 26。但得到崩溃Android模拟器API 21

我已经搜索谷歌,我也发现了同样的问题here但没有找到任何足够的答案。

注 - :我已经使用运行权限读/写外部存储

但在提到的设备仍然得到崩溃。下面是我的崩溃对数:

Fatal Exception: java.lang.RuntimeException: Failure delivering result ResultInfo{who=android:fragment:0, request=1, result=-1, data=Intent { dat=content://com.android.providers.media.documents/document/image:51 flg=0x1 }} to activity {com.example/com.scanlibrary.ScanActivity}: java.lang.NullPointerException: uriString 

at android.app.ActivityThread.deliverResults(ActivityThread.java:3574)

at android.app.ActivityThread.handleSendResult(ActivityThread.java:3617)

at android.app.ActivityThread.access$1300(ActivityThread.java:151)

at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1352)

at android.os.Handler.dispatchMessage(Handler.java:102)

at android.os.Looper.loop(Looper.java:135)

at android.app.ActivityThread.main(ActivityThread.java:5254)

at java.lang.reflect.Method.invoke(Method.java)

at java.lang.reflect.Method.invoke(Method.java:372)

at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903)

at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698)

Caused by java.lang.NullPointerException: uriString

at android.net.Uri$StringUri.<init>(Uri.java:470)

at android.net.Uri$StringUri.<init>(Uri.java:460)

at android.net.Uri.parse(Uri.java:432)

at com.scanlibrary.Utils.getUri(Utils.java:24)

at com.scanlibrary.PickImageFragment.postImagePick(PickImageFragment.java:228)

at com.scanlibrary.PickImageFragment.onActivityResult(PickImageFragment.java:208)

at android.app.Activity.dispatchActivityResult(Activity.java:6196)

at android.app.ActivityThread.deliverResults(ActivityThread.java:3570)

at android.app.ActivityThread.handleSendResult(ActivityThread.java:3617)

at android.app.ActivityThread.access$1300(ActivityThread.java:151)

at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1352)

at android.os.Handler.dispatchMessage(Handler.java:102)

at android.os.Looper.loop(Looper.java:135)

at android.app.ActivityThread.main(ActivityThread.java:5254)

at java.lang.reflect.Method.invoke(Method.java)

at java.lang.reflect.Method.invoke(Method.java:372)

at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903)

at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698)

感谢

回答:

而不是使用下面的代码 - :

String path = MediaStore.Media.insertImage(context.getContentResolver(),bitmap,"Title",null); 

使用此代码(下) - :

ContentValues values=new ContentValues(); 

values.put(MediaStore.Images.Media.TITLE,"Title");

values.put(MediaStore.Images.Media.DESCRIPTION,"From Camera");

Uri path=getContentResolver().insert(MediaStore.Images.Media.EXTERNAL_CONTENT_URI,values);

传递值如果它不工作,则为null。

回答:

protected void onActivityResult(int requestCode, int resultCode,Intent data) { 

if (requestCode == RequestPermissionCode && resultCode == RESULT_OK) {

try {

String[] filePathColumn = {MediaStore.Images.Media.DATA};

Cursor cursor = getContentResolver().query(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, filePathColumn, null, null, null);

if (cursor == null)

return;

// find the file in the media area

cursor.moveToLast();

int columnIndex = cursor.getColumnIndex(filePathColumn[0]);

String filePath = "file:///"+cursor.getString(columnIndex);

cursor.close();

actualImage = FileUtil.from(this,Uri.parse(filePath));

actualImageView.setImageBitmap(BitmapFactory.decodeFile(actualImage.getAbsolutePath()));

} catch (Exception e) {

Toast.makeText(getApplicationContext(), e.toString(), Toast.LENGTH_LONG).show();

}

}

}

使用onActvittyResult方法,我希望它能工作。

以上是 MediaStore.Images.Media.insertImage在某些设备中返回null 的全部内容, 来源链接: utcz.com/qa/258357.html

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