2

我正在将 facebook 与 android 集成，我想在拍照时将其保存到 sdcard，然后将其上传到 facebook。

这是我的代码：

photo_up=(Button)findViewById(R.id.camera_foto_button);
            photo_up.setOnClickListener(new View.OnClickListener() {
                   public void onClick(View v) {
                       final Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);  
                       intent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(getTempFile(PlaceScreen.this)) );   
                       startActivityForResult(intent,CAMERA_REQUEST); 
                   }
                });

 private File getTempFile(Context context){  
          //it will return /sdcard/image.tmp  
          final File path = new File( Environment.getExternalStorageDirectory(), context.getPackageName() );  
          if(!path.exists()){  
            path.mkdir();  
          }  
          return new File(path, "image.png");  
        }

和 OnActivity 结果

protected void onActivityResult(int requestCode, int resultCode, Intent data) {  
    switch(requestCode){
                case CAMERA_REQUEST:{
                    final File file = getTempFile(this);  
                    try {  
                      bmp = MediaStore.Images.Media.getBitmap(this.getContentResolver(), Uri.fromFile(file) );  
                      // do whatever you want with the bitmap (Resize, Rename, Add To Gallery, etc)  
                    } catch (FileNotFoundException e) {  
                      e.printStackTrace();  
                    } catch (IOException e) {  
                      e.printStackTrace();  
                    }  


                    ByteArrayOutputStream stream = new ByteArrayOutputStream();        
                    bmp.compress(Bitmap.CompressFormat.PNG, 100, stream);         
                    byteArray = stream.toByteArray(); // convert camera photo to byte array  
                    Bundle params = new Bundle();       
                    params.putByteArray("picture", byteArray);      
                    params.putString("message", "Have fun");       
                    Utility.mAsyncRunner.request("me/photos", params,
                            "POST", new PhotoUploadListener(), null);
                    break;
                }

所以会发生这样的事情：相机打开，图像被捕获并保存，但我强制关闭并且它没有上传到 fb。

我也在手机上查过。Logcat 在这里：

05-31 02:50:19.437: E/AndroidRuntime(2470): FATAL EXCEPTION: main
05-31 02:50:19.437: E/AndroidRuntime(2470): java.lang.RuntimeException: Unable to resume activity {com.myname.package/com.myname.package.PlaceScreen}: java.lang.RuntimeException: Failure delivering result ResultInfo{who=null, request=1888, result=-1, data=Intent { act=inline-data (has extras) }} to activity {com.myname.package/com.myname.package.PlaceScreen}: java.lang.NullPointerException
05-31 02:50:19.437: E/AndroidRuntime(2470):     at android.app.ActivityThread.performResumeActivity(ActivityThread.java:2124)
05-31 02:50:19.437: E/AndroidRuntime(2470):     at android.app.ActivityThread.handleResumeActivity(ActivityThread.java:2139)
05-31 02:50:19.437: E/AndroidRuntime(2470):     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1672)
05-31 02:50:19.437: E/AndroidRuntime(2470):     at android.app.ActivityThread.handleRelaunchActivity(ActivityThread.java:2836)
05-31 02:50:19.437: E/AndroidRuntime(2470):     at android.app.ActivityThread.access$1600(ActivityThread.java:117)
05-31 02:50:19.437: E/AndroidRuntime(2470):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:939)
05-31 02:50:19.437: E/AndroidRuntime(2470):     at android.os.Handler.dispatchMessage(Handler.java:99)
05-31 02:50:19.437: E/AndroidRuntime(2470):     at android.os.Looper.loop(Looper.java:130)
05-31 02:50:19.437: E/AndroidRuntime(2470):     at android.app.ActivityThread.main(ActivityThread.java:3687)
05-31 02:50:19.437: E/AndroidRuntime(2470):     at java.lang.reflect.Method.invokeNative(Native Method)
05-31 02:50:19.437: E/AndroidRuntime(2470):     at java.lang.reflect.Method.invoke(Method.java:507)
05-31 02:50:19.437: E/AndroidRuntime(2470):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:867)
05-31 02:50:19.437: E/AndroidRuntime(2470):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:625)
05-31 02:50:19.437: E/AndroidRuntime(2470):     at dalvik.system.NativeStart.main(Native Method)
05-31 02:50:19.437: E/AndroidRuntime(2470): Caused by: java.lang.RuntimeException: Failure delivering result ResultInfo{who=null, request=1888, result=-1, data=Intent { act=inline-data (has extras) }} to activity {com.myname.package/com.myname.package.PlaceScreen}: java.lang.NullPointerException
05-31 02:50:19.437: E/AndroidRuntime(2470):     at android.app.ActivityThread.deliverResults(ActivityThread.java:2536)
05-31 02:50:19.437: E/AndroidRuntime(2470):     at android.app.ActivityThread.performResumeActivity(ActivityThread.java:2111)
05-31 02:50:19.437: E/AndroidRuntime(2470):     ... 13 more
05-31 02:50:19.437: E/AndroidRuntime(2470): Caused by: java.lang.NullPointerException
05-31 02:50:19.437: E/AndroidRuntime(2470):     at com.myname.package.PlaceScreen.onActivityResult(PlaceScreen.java:325)
05-31 02:50:19.437: E/AndroidRuntime(2470):     at android.app.Activity.dispatchActivityResult(Activity.java:3908)
05-31 02:50:19.437: E/AndroidRuntime(2470):     at android.app.ActivityThread.deliverResults(ActivityThread.java:2532)
05-31 02:50:19.437: E/AndroidRuntime(2470):     ... 14 more

编辑：

好的，我的 bmp 哪里是空的。这是为什么？有什么错？

bmp = MediaStore.Images.Media.getBitmap(this.getContentResolver(), Uri.fromFile(file) );  
bmp.compress(Bitmap.CompressFormat.PNG, 100, stream);

任何人都可以找出为什么我的 bmp 为空，而我可以在图库中看到图像。这意味着图像被正常拍摄，但由于 bmp=MediaStore.Images.Media 没有得到任何结果

4

1 回答 1

5

在使用网络上可用的通用代码来调用相机并拍照并检索它时，我当时在 SAMSUNG 设备中遇到了一些问题，同样的错误发生Failure delivering result ResultInfo并且找不到任何解决方案，可能是因为任何 API 级别或设备依赖性.

但为了克服它，我用另一种方式编写代码来完成任务，代码在这里：

1）调用相机

        String _path = Environment.getExternalStorageDirectory()
        + File.separator + "TakenFromCamera.png";
        File file = new File(_path);
        Uri outputFileUri = Uri.fromFile(file);
        Intent intent = new Intent(
        android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
        intent.putExtra(MediaStore.EXTRA_OUTPUT, outputFileUri);
        startActivityForResult(intent, 1212);

2）在ActivityResult中获取Bitmap

            if (requestCode == 1212) {
                String _path = Environment.getExternalStorageDirectory()
                + File.separator + "TakenFromCamera.png";
                mBitmap = BitmapFactory.decodeFile(_path);
                if (mBitmap == null) {
                    // bitmap still null
                } else {
                    // set bitmap in imageview
                }
            }
于 2012-06-08T06:21:21.247 回答