在我的应用程序中，用户从图库中选择图片并上传。在许多设备上，我的代码运行完美，但在新设备(例如:三星 S5、LG G2、三星 S4)上，应用程序在选择照片时崩溃。 我将应用程序上传到 Google Play Store 并下载了这些设备，然后在应用程序崩溃时向 google play 发送报告。 这是我选择图片和调整大小的代码。

Intent intent = new Intent();
intent.setType("image/*");
intent.setAction(Intent.ACTION_GET_CONTENT);
startActivityForResult(Intent.createChooser(intent, "Complete action using"), 1); 

public Bitmap getResizedBitmap(Bitmap bm, int newHeight, int newWidth) {
    int width = bm.getWidth();
    int height = bm.getHeight();
    float scaleWidth = ((float) newWidth) / width;
    float scaleHeight = ((float) newHeight) / height;
    // create a matrix for the manipulation
    Matrix matrix = new Matrix();
    // resize the bit map
    matrix.postScale(scaleHeight, scaleHeight);
    // recreate the new Bitmap
    Bitmap resizedBitmap = Bitmap.createBitmap(bm, 0, 0, width, height, matrix, false);
    return resizedBitmap; }

 protected void onActivityResult(int requestCode, int resultCode, Intent data) {
 if (requestCode == 1 && resultCode == RESULT_OK) {
        //Bitmap photo = (Bitmap) data.getData().getPath(); 

     Uri selectedImageUri = data.getData();
     imagepath = getPath(selectedImageUri);

     Bitmap myBitmap = getResizedBitmap(BitmapFactory.decodeFile(imagepath),200,200);

     try {
         ExifInterface exif = new ExifInterface(imagepath);
         orientation = exif.getAttributeInt(ExifInterface.TAG_ORIENTATION, 1);
         Log.d("EXIF", "Exif: " + orientation);
         resimyon=Integer.toString(orientation);
         Matrix matrix = new Matrix();
         if (orientation == 6) {
             matrix.postRotate(90);
         }
         else if (orientation == 3) {
             matrix.postRotate(180);
         }
         else if (orientation == 8) {
             matrix.postRotate(270);
         }
         myBitmap = Bitmap.createBitmap(myBitmap, 0, 0, myBitmap.getWidth(), myBitmap.getHeight(), matrix, true); // rotating bitmap
     }
     catch (Exception e) {

     }


     imageview.setImageBitmap(myBitmap);
     messageText.setText("Yüklenecek dosya:" +imagepath);
     uploadButton.setEnabled(true);

 } 

这些是来自三星 S5 和 LG G2 的报告。

三星 S5

java.lang.SecurityException
konum: android.os.Parcel.readException

java.lang.RuntimeException: Failure delivering result ResultInfo{who=null, request=1, result=-1,     data=Intent { dat=content://media/external/images/media/1909 (has extras) }} to activity    {com.turk.bakistik/com.turk.bakistik.Profilresimyukle}: java.lang.SecurityException: Permission    Denial: reading com.android.providers.media.MediaProvider uri   content://media/external/images/media/1909 from pid=29038, uid=10236 requires    android.permission.READ_EXTERNAL_STORAGE, or grantUriPermission()
at android.app.ActivityThread.deliverResults(ActivityThread.java:3663)
at android.app.ActivityThread.handleSendResult(ActivityThread.java:3706)
at android.app.ActivityThread.access$1400(ActivityThread.java:173)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1351)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:136)
at android.app.ActivityThread.main(ActivityThread.java:5579)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1268)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1084)
at dalvik.system.NativeStart.main(Native Method)
Caused by: java.lang.SecurityException: Permission Denial: reading      com.android.providers.media.MediaProvider uri content://media/external/images/media/1909 from pid=29038, uid=10236 requires android.permission.READ_EXTERNAL_STORAGE, or grantUriPermission()
at android.os.Parcel.readException(Parcel.java:1465)
at android.database.DatabaseUtils.readExceptionFromParcel(DatabaseUtils.java:185)
at android.database.DatabaseUtils.readExceptionFromParcel(DatabaseUtils.java:137)
at android.content.ContentProviderProxy.query(ContentProviderNative.java:413)
at android.content.ContentResolver.query(ContentResolver.java:464)
at android.content.ContentResolver.query(ContentResolver.java:407)
at android.app.Activity.managedQuery(Activity.java:1898)
at com.turk.bakistik.Profilresimyukle.getPath(Profilresimyukle.java:209)
at com.turk.bakistik.Profilresimyukle.onActivityResult(Profilresimyukle.java:173)
at android.app.Activity.dispatchActivityResult(Activity.java:5643)
at android.app.ActivityThread.deliverResults(ActivityThread.java:3659)
... 11 more  

LG G2

java.lang.NullPointerException
konum: com.turk.bakistik.Profilresimyukle.getResizedBitmap
java.lang.RuntimeException: Failure delivering result ResultInfo{who=null, request=1, result=-1, data=Intent { dat=content://com.android.providers.media.documents/document/image:41 flg=0x1 }} to activity {com.turk.bakistik/com.turk.bakistik.Profilresimyukle}: java.lang.NullPointerException
at android.app.ActivityThread.deliverResults(ActivityThread.java:3382)
at android.app.ActivityThread.handleSendResult(ActivityThread.java:3425)
at android.app.ActivityThread.access$1300(ActivityThread.java:139)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1248)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:136)
at android.app.ActivityThread.main(ActivityThread.java:5105)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:792)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:608)
at dalvik.system.NativeStart.main(Native Method)
Caused by: java.lang.NullPointerException
at com.turk.bakistik.Profilresimyukle.getResizedBitmap(Profilresimyukle.java:123)
at com.turk.bakistik.Profilresimyukle.onActivityResult(Profilresimyukle.java:175)
at android.app.Activity.dispatchActivityResult(Activity.java:5467)
at android.app.ActivityThread.deliverResults(ActivityThread.java:3378)
... 11 more

我该如何解决这个问题？

最佳答案

因为自 android kitkat 以来，您无法像正常方式那样获取图像本地路径。请检查设备 android 版本，如果版本 < kitkat，您可以使用您的方式。如果版本是="" kitkat="">

/**
 * Get a file path from a Uri. This will get the the path for Storage Access
 * Framework Documents, as well as the _data field for the MediaStore and
 * other file-based ContentProviders.
 *
 * @param context The context.
 * @param uri The Uri to query.
 * @author paulburke
 */
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 the remote address
        if (isGooglePhotosUri(uri))
            return uri.getLastPathSegment();

        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 index = cursor.getColumnIndexOrThrow(column);
            return cursor.getString(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());
}

/**
 * @param uri The Uri to check.
 * @return Whether the Uri authority is Google Photos.
 */
public static boolean isGooglePhotosUri(Uri uri) {
    return "com.google.android.apps.photos.content".equals(uri.getAuthority());
}

关于在新设备上选择照片时 Android 应用程序崩溃，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/26355547/