如何在Android 4.4上的圖庫中以編程方式存儲圖像

Question

我的代碼在較舊的Android上運行良好，但在Android 4.4上卻出現錯誤。 我試圖將文件復制到外部存儲，但這無濟於事。 您可以在日志中看到該文件已復制，但是由於Media.insertImage上的代碼阻塞，可能無法正確創建Bitmap 。

請注意，如果我使用Intent在應用程序中打開文件，則此確切的代碼會很好地工作（因此，外部存儲必須工作良好）。

另請注意，我具有以下權限：

<uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS"/>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>

我的密碼

public static void storeImageToSystemGalery (String image_fullPathFileName) {
    try {
        Log.e(TAG, "Pp: CALLED: storeImageToSystemGalery (image_fullPathFileName=" + image_fullPathFileName +")");

        java.io.File internal_f = new java.io.File(image_fullPathFileName);
        Log.e(TAG, "Pp: internal_f: exists test=" + internal_f.exists());
        Log.e(TAG, "Pp: internal_f: canRead test=" + internal_f.canRead());


        File external_f = new File(parentActivity.getExternalFilesDir(null), "galery_shared.jpg");
        Log.e(TAG, "Pp: external_f.AbsolutePath=" + external_f.getAbsolutePath());
        _f_copy(internal_f, external_f);
        Log.e(TAG, "Pp: external_f: exists test=" + external_f.exists());
        Log.e(TAG, "Pp: external_f: canRead test=" + external_f.canRead());

        Uri imageURI = Uri.fromFile(external_f);

        android.graphics.Bitmap bmp = android.provider.MediaStore.Images.Media.getBitmap(parentActivity.getContentResolver(), imageURI);
        android.provider.MediaStore.Images.Media.insertImage(parentActivity.getContentResolver(), bmp, "Prstynek", "Muj prstynek");

    } catch (Exception ex) {
        Log.w(TAG, "FAILED to storeImageToSystemGalery: " + ex);
        ex.printStackTrace();
    }
}


static private void _f_copy(File fin, File dst) throws IOException {
    FileInputStream in=new FileInputStream(fin);
    FileOutputStream out=new FileOutputStream(dst);
    byte[] buf=new byte[1024];
    int len;

    while ((len=in.read(buf)) > 0) {
        out.write(buf, 0, len);
    }

    in.close();
    out.close();
}

日志轉儲：

E/cocos2d.sharkintelligence.Helper__sharkCore( 5824): Pp: CALLED: storeImageToSystemGalery (image_fullPathFileName=/data/data/com.sharkintelligence.test.trivialdrive2/files/product_preview_shared.jpg)
E/cocos2d.sharkintelligence.Helper__sharkCore( 5824): Pp: internal_f: exists test=true
E/cocos2d.sharkintelligence.Helper__sharkCore( 5824): Pp: internal_f: canRead test=true
E/cutils  (  166): Failed to mkdirat(/Removable/MicroSD): Read-only file system
W/ContextImpl( 5824): Failed to ensure directory: /Removable/MicroSD/Android/data/com.sharkintelligence.test.trivialdrive2/files
E/cocos2d.sharkintelligence.Helper__sharkCore( 5824): Pp: external_f.AbsolutePath=/storage/emulated/0/Android/data/com.sharkintelligence.test.trivialdrive2/files/galery_shared.jpg
W/Vold    (  166): Returning OperationFailed - no handler for errno 30
E/cocos2d.sharkintelligence.Helper__sharkCore( 5824): Pp: external_f: exists test=true
E/cocos2d.sharkintelligence.Helper__sharkCore( 5824): Pp: external_f: canRead test=true
D/dalvikvm( 5824): GC_CONCURRENT freed 2216K, 24% free 7501K/9764K, paused 3ms+4ms, total 15ms
D/dalvikvm( 5824): WAIT_FOR_CONCURRENT_GC blocked 15ms
I/dalvikvm-heap( 5824): Grow heap (frag case) to 11.358MB for 4187152-byte allocation
D/dalvikvm( 5824): GC_CONCURRENT freed 138K, 18% free 11452K/13856K, paused 1ms+3ms, total 7ms
E/MediaStore( 5824): Failed to insert image
E/MediaStore( 5824): java.io.FileNotFoundException: No such file or directory
E/MediaStore( 5824):    at android.database.DatabaseUtils.readExceptionWithFileNotFoundExceptionFromParcel(DatabaseUtils.java:146)
E/MediaStore( 5824):    at android.content.ContentProviderProxy.openAssetFile(ContentProviderNative.java:611)
E/MediaStore( 5824):    at android.content.ContentResolver.openAssetFileDescriptor(ContentResolver.java:922)
E/MediaStore( 5824):    at android.content.ContentResolver.openOutputStream(ContentResolver.java:669)
E/MediaStore( 5824):    at android.content.ContentResolver.openOutputStream(ContentResolver.java:645)
E/MediaStore( 5824):    at android.provider.MediaStore$Images$Media.insertImage(MediaStore.java:912)
E/MediaStore( 5824):    at com.sharkintelligence.android.app.Helper__sharkCore.storeImageToSystemGalery(Helper__sharkCore.java:295)
E/MediaStore( 5824):    at org.cocos2dx.lib.Cocos2dxRenderer.nativeRender(Native Method)
E/MediaStore( 5824):    at org.cocos2dx.lib.Cocos2dxRenderer.onDrawFrame(Cocos2dxRenderer.java:91)
E/MediaStore( 5824):    at android.opengl.GLSurfaceView$GLThread.guardedRun(GLSurfaceView.java:1531)
E/MediaStore( 5824):    at android.opengl.GLSurfaceView$GLThread.run(GLSurfaceView.java:1248)
D/MediaProvider(  787): object removed 188

Answer 1

最終讓它正常工作。 使用了以下功能：此鏈接中的createExternalStoragePublicPicture（）： http : //developer.android.com/reference/android/os/Environment.html#getExternalStoragePublicDirectory (java.lang.String ）