我发布了一个应用程序，其中一项基本功能是允许用户拍照，然后将该照片保存在其外部存储上的特定文件夹中。

一切似乎都运行良好，但我现在收到两份报告，声称在拍照后单击“完成”退出相机(并返回到 Activity)，应用程序被强制关闭，将用户带回主屏幕。

这发生在三星 Nexus S 和 Galaxy Tab 上。下面我发布了我的代码以显示我设置了我的 Intent 以及我如何处理在 onActivityResult() 中保存和显示照片。在单击“完成”退出相机应用程序后可能导致其崩溃的任何指导，将不胜感激!

同样，这似乎在大多数设备上运行良好，但我想知道它们是否是我应该采用的更有效、更通用的方法。谢谢

我是如何触发相机 Intent 的

   case ACTION_BAR_CAMERA:

        // numbered image name
        fileName = "image_" + String.valueOf(numImages) + ".jpg";


        output = new File(direct + File.separator + fileName); // create
                                                                    // output
        while (output.exists()) { // while the file exists
            numImages++; // increment number of images
            fileName = "image_" + String.valueOf(numImages) + ".jpg";
            output = new File(outputFolder, fileName);


        }
        camera = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
        uriSavedImage = Uri.fromFile(output); // get Uri of the output
        camera.putExtra(MediaStore.EXTRA_OUTPUT, uriSavedImage); //pass in Uri to camera intent
        startActivityForResult(camera, 1);


        phá vỡ;
    mặc định:
        return super.onHandleActionBarItemClick(item, position);
    }
    trả về giá trị đúng;
}

我如何设置 onActivityResult()

@Ghi đè
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    // TODO Phương thức tự động tạo stub
    super.onActivityResult(requestCode, resultCode, data);

    if (resultCode == RESULT_OK) { // If data was passed successfully

        Bundle extras = data.getExtras();

        //Bundle extras = data.getBundleExtra(MediaStore.EXTRA_OUTPUT);

        /*ad = new AlertDialog.Builder(this).create();
        ad.setIcon(android.R.drawable.ic_menu_camera);
        ad.setTitle("Save Image");
        ad.setMessage("Save This Image To Album?");
        ad.setButton("Ok", this);

        ad.show();*/



        bmp = (Bitmap) extras.get("data"); // Set the bitmap to the bundle
                                            // of data that was just
                                            // received
        image.setImageBitmap(bmp); // Set imageview to image that was
                                    // captured
        image.setScaleType(ScaleType.FIT_XY);


    }

}

câu trả lời hay nhất

首先让我们明确一点 - 我们有两个选项可以从相机中获取 onActivityResult 中的图像数据:

1. 通过传递您要保存的图像的确切位置 Uri 来启动相机。

2. Just Start Camera 不传递任何 Loaction Uri。

1 .第一种情况:

通过将图像 Uri 传递到您要保存的位置来启动相机:

String imageFilePath = Environment.getExternalStorageDirectory().getAbsolutePath() + "/picture.jpg";  
File imageFile = new File(imageFilePath); 
Uri imageFileUri = Uri.fromFile(imageFile); // convert path to Uri

Intent it = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE); 
it.putExtra(android.provider.MediaStore.EXTRA_OUTPUT, imageFileUri); 
startActivityForResult(it, CAMERA_RESULT);

在 onActivityResult 中接收图像为:

@Ghi đè 
protected void onActivityResult(int requestCode, int resultCode, Intent data) { 
    super.onActivityResult(requestCode, resultCode, data); 

    if (RESULT_OK == resultCode) { 
        iv = (ImageView) findViewById(R.id.ReturnedImageView); 

        // Decode it for real 
        BitmapFactory.Options bmpFactoryOptions = new BitmapFactory.Options();
        bmpFactoryOptions.inJustDecodeBounds = sai; 

        //imageFilePath image path which you pass with intent 
        Bản đồ bit bmp = BitmapFactory.decodeFile(imageFilePath, bmpFactoryOptions); 

        // Display it 
        iv.setImageBitmap(bmp); 
    }    
} 

2 。第二种情况:

如果您想在 Intent(data) 中接收图像，则在不传递图像 Uri 的情况下启动相机:

Intent it = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE); 
startActivityForResult(it, CAMERA_RESULT); 

在 onActivityResult 接收图像为:

@Ghi đè 
protected void onActivityResult(int requestCode, int resultCode, Intent data) { 
    super.onActivityResult(requestCode, resultCode, data); 

    if (RESULT_OK == resultCode) { 
        // Get Extra from the intent 
        Bundle extras = data.getExtras(); 
        // Get the returned image from extra 
        Bitmap bmp = (Bitmap) extras.get("data"); 

        iv = (ImageView) findViewById(R.id.ReturnedImageView); 
        iv.setImageBitmap(bmp); 
    } 
} 

关于相机 Intent 后Android崩溃，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/8997050/