从相机意图获取图像路径

Question

在我的应用程序中有从相机捕获图像的选项。但是从相机获取图像存在问题。当我使用ACTION_IMAGE_CAPTURE 时，它返回空数据。请帮助我 从相机意图获取图像路径

错误日志：

07-04 11:22:36.902: E/AndroidRuntime(8329): FATAL EXCEPTION: main
07-04 11:22:36.902: E/AndroidRuntime(8329): java.lang.RuntimeException: Unable to resume activity {com.pausefablogin/com.pausefablogin.AddPOI}: java.lang.RuntimeException: Failure delivering result ResultInfo{who=null, request=111, result=-1, data=null} to activity {com.pausefablogin/com.pausefablogin.AddPOI}: java.lang.NullPointerException
07-04 11:22:36.902: E/AndroidRuntime(8329):     at android.app.ActivityThread.performResumeActivity(ActivityThread.java:2124)
07-04 11:22:36.902: E/AndroidRuntime(8329):     at android.app.ActivityThread.handleResumeActivity(ActivityThread.java:2139)
07-04 11:22:36.902: E/AndroidRuntime(8329):     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1672)
07-04 11:22:36.902: E/AndroidRuntime(8329):     at android.app.ActivityThread.handleRelaunchActivity(ActivityThread.java:2836)
07-04 11:22:36.902: E/AndroidRuntime(8329):     at android.app.ActivityThread.access$1600(ActivityThread.java:117)
07-04 11:22:36.902: E/AndroidRuntime(8329):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:939)
07-04 11:22:36.902: E/AndroidRuntime(8329):     at android.os.Handler.dispatchMessage(Handler.java:99)
07-04 11:22:36.902: E/AndroidRuntime(8329):     at android.os.Looper.loop(Looper.java:130)
07-04 11:22:36.902: E/AndroidRuntime(8329):     at android.app.ActivityThread.main(ActivityThread.java:3687)
07-04 11:22:36.902: E/AndroidRuntime(8329):     at java.lang.reflect.Method.invokeNative(Native Method)
07-04 11:22:36.902: E/AndroidRuntime(8329):     at java.lang.reflect.Method.invoke(Method.java:507)
07-04 11:22:36.902: E/AndroidRuntime(8329):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:842)
07-04 11:22:36.902: E/AndroidRuntime(8329):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:600)
07-04 11:22:36.902: E/AndroidRuntime(8329):     at dalvik.system.NativeStart.main(Native Method)
07-04 11:22:36.902: E/AndroidRuntime(8329): Caused by: java.lang.RuntimeException: Failure delivering result ResultInfo{who=null, request=111, result=-1, data=null} to activity {com.pausefablogin/com.pausefablogin.AddPOI}: java.lang.NullPointerException
07-04 11:22:36.902: E/AndroidRuntime(8329):     at android.app.ActivityThread.deliverResults(ActivityThread.java:2536)
07-04 11:22:36.902: E/AndroidRuntime(8329):     at android.app.ActivityThread.performResumeActivity(ActivityThread.java:2111)
07-04 11:22:36.902: E/AndroidRuntime(8329):     ... 13 more
07-04 11:22:36.902: E/AndroidRuntime(8329): Caused by: java.lang.NullPointerException
07-04 11:22:36.902: E/AndroidRuntime(8329):     at com.pausefablogin.AddPOI.onActivityResult(AddPOI.java:281)
07-04 11:22:36.902: E/AndroidRuntime(8329):     at android.app.Activity.dispatchActivityResult(Activity.java:3908)
07-04 11:22:36.902: E/AndroidRuntime(8329):     at android.app.ActivityThread.deliverResults(ActivityThread.java:2532)
07-04 11:22:36.902: E/AndroidRuntime(8329):     ... 14 more

提前致谢

Answer 1

试试这个

 Intent i = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
    startActivityForResult(i , 0);          

然后调用它

@Override
protected void onActivityResult(int requestCode, int resultCode,
        Intent resultData) {
    super.onActivityResult(requestCode, resultCode, resultData);

        if (resultData != null) {

        String[] projection = { MediaStore.Images.Media.DATA };
                Cursor cursor = managedQuery(
                        MediaStore.Images.Media.EXTERNAL_CONTENT_URI,
                        projection, null, null, null);
                int column_index_data = cursor
                        .getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
                cursor.moveToLast();

                String imagePath = cursor.getString(column_index_data);
                Bitmap bitmapImage = BitmapFactory.decodeFile(imagePath );
                imageView.setImageBitmap(bitmapImage );

            }

并使用你想要的prrmission

 <uses-permission android:name="android.permission.CAMERA" /> 
    <permission android:name="android.permission.FLASHLIGHT" />
    <uses-feature android:name="android.hardware.camera"/>

Answer 2

我遇到了同样的问题，以下对我有用：

@Override
public void onClick(View v) {
        Intent intent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
        startActivityForResult(Intent.createChooser(intent, "Select Picture"), CAPTURE_IMAGE_ACTIVITY_REQUEST_CODE);
                }
        });
    }

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
//super.onActivityResult(requestCode, resultCode, data);
    if(requestCode == CAPTURE_IMAGE_ACTIVITY_REQUEST_CODE && resultCode == RESULT_OK) {
        final ContentResolver cr = getContentResolver();
        final String[] p1 = new String[] {
            MediaStore.Images.ImageColumns._ID,
            MediaStore.Images.ImageColumns.DATE_TAKEN
                };
    Cursor c1 = cr.query(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, p1, null, null, p1[1] + " DESC");
        if ( c1.moveToFirst() ) {
        String uristringpic = "content://media/external/images/media/" +c1.getInt(0);
         Uri uri = Uri.parse(uristringpic);
            try {
              Bitmap bm = android.provider.MediaStore.Images.Media.getBitmap(cr, uri);

希望这会有所帮助，因为我知道这有多令人沮丧。

Answer 3

如果您成功实现代码，您将获得捕获的图像，然后您可以手动保存它以供将来使用。

@Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {  
        if (requestCode == CAMERA_REQUEST && resultCode == RESULT_OK) {  
            Bitmap photo = (Bitmap) data.getExtras().get("data"); 
            videoView.setVisibility(View.INVISIBLE);
            imageView.setVisibility(View.VISIBLE);
            imageView.setImageBitmap(photo);
        }
    } 

Answer 4

您可以使用以下步骤：

// create a global variable
File destination;
openCameraBtn.setOnClickListener(new OnClickListener() 
{

            @Override
            public void onClick(View v) {
                 destination = new   File(Environment.getExternalStorageDirectory(),"image.jpg");

                 Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
                 intent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(destination));
                 startActivityForResult(intent, CAMERA_PICTURE);

            }
        });


@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) 
    {


    if(requestCode == CAMERA_PICTURE && resultCode == Activity.RESULT_OK) 
           {
           try{
            FileInputStream in = new FileInputStream(destination);
            BitmapFactory.Options options = new BitmapFactory.Options();
            options.inSampleSize = 10; //Downsample 10x
            Log.d("PP", " bitmap factory=========="+options);
            Bitmap user_picture_bmp = BitmapFactory.decodeStream(in, null, options);
        userImage.setImageBitmap(user_picture_bmp);
        } catch (Exception e) 
          { e.printStackTrace();
         }

    } 

请在您的清单文件中声明权限和功能。

<uses-permission android:name="android.permission.CAMERA" />
<uses-feature android:name="android.hardware.camera" />

如果你想更详细，那么你可以使用以下链接：

http://developer.android.com/guide/topics/media/camera.html

我希望你会成功。

Answer 5

您可能正在运行三星设备。我相信这是这些设备中发生的错误。否则，您必须获取 URI。这样做：

/**
  * (This is a variable instance) Contains the path and file name where you want to save the image.
  * Mainly used to start Intent.Action_View with this URI. (GalleryApp)
  */
private Uri uriImage= null;

public void onClickCamera(View v){
    // Cria uma intent para capturar uma imagem e retorna o controle para quem o chamou (NAO PRECISA DECLARAR PERMISSAO NO MANIFESTO PARA ACESSAR A CAMERA POIS O FAZEMOS VIA INTENT).
    // Creates an intent to capture an image and returns control to the caller
    Intent intent = new Intent( MediaStore.ACTION_IMAGE_CAPTURE );
    // Cria um arquivo para salvar a imagem.
    // Creates an file to save the image.
    uriImage = ProcessaImagens.getOutputMediaFileUri( ProcessaImagens.MEDIA_TYPE_IMAGE, getActivity().getApplicationContext() );
    // Intent to pass a URI object containing the path and file name where you want to save the image. We'll get through the data parameter of the method onActivityResult().
    intent.putExtra( MediaStore.EXTRA_OUTPUT, uriImagem );
    // Starts the intent to image capture and waits the result.
    startActivityForResult( intent, CAPTURE_IMAGE_ACTIVITY_REQUEST_CODE );
}

ProcessaImagens 类是我编写并与大家分享的类。可以使用这个类来方便。如果要将图像保存在数据库中，它有一个很好的压缩图像的方法。在其onActivityResult() 方法中执行以下操作：

@Override
public void onActivityResult( int requestCode, int resultCode, Intent data ) {
    // If finished activity on startForActivityResult.
    if ( resultCode == Activity.RESULT_OK ) {
        if ( requestCode == CAPTURE_IMAGE_ACTIVITY_REQUEST_CODE ) {
            String imagePath = uriImage.getPath();
            // I will compress the imagem. Read the javadoc from method and you'll see which it returns both bitmap and array bytes.
            List<Object> imageCompact = ProcessaImagens.compactarImagem( uriImagem.getPath() );
            Bitmap imageBitmap = (Bitmap) imageCompact.get( 0 );
            byte[] imageBytes = (byte[]) imageCompact.get( 1 );

        }
    }
    // If canceled activity on startForActivityResult.
    else if ( resultCode == Activity.RESULT_CANCELED ) {
        if ( requestCode == CAPTURE_IMAGE_ACTIVITY_REQUEST_CODE ) {
            // User canceled the image capture.
            Log.d( getTag(), "Image capture canceled!" );
        }
    }
    // If an error occurred in the activity on startForActivityResult.
    else {
        // Failed the image capture, alert the user.
        Toast.makeText( getActivity().getApplicationContext(), "FAILED! The image capture failed!", Toast.LENGTH_LONG ).show();
        Log.e( getTag(), "FAILED! The image capture failed!" );
    }
}

请注意，我使用了getActivity().getApplicationContext()，因为我从片段而不是从活动中获取上下文。我相信用这种方法你可以得到你想要的。只需对表单获取上下文的方式稍作更改即可。

Answer 6

 Cursor cursor = getContentResolver().query(Media.EXTERNAL_CONTENT_URI, new String[]{Media.DATA, Media.DATE_ADDED, MediaStore.Images.ImageColumns.ORIENTATION}, Media.DATE_ADDED, null, "date_added ASC");
         if(cursor != null && cursor.moveToFirst())
         {
             do {
                 Uri uri = Uri.parse(cursor.getString(cursor.getColumnIndex(Media.DATA)));
                 String photoPath = uri.toString();
             }while(cursor.moveToNext());


             cursor.close();
         }

当 while 循环进行最后一次迭代时，它会给出上次捕获的图像路径。

Answer 7

确保您已将此标签放入清单文件中：<uses-feature android:name="android.hardware.camera" />

这可能会对您有所帮助：https://stackoverflow.com/a/10779050/2514032