拍一张照片

时间:2012-05-16 13:39:36

标签: android android-camera

有一个简单的教程可以用android(http://developer.android.com/guide/topics/media/camera.html)拍照,我跟着它。

private static final int CAPTURE_IMAGE_ACTIVITY_REQUEST_CODE = 100;
protected void onTakePicture()
{
    // create Intent to take a picture and return control to the calling application    
    Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);    
    // create a file to save the image    
    File file = Environment.getExternalStorageDirectory();
    String path = file.getAbsolutePath() + "/Android/data/com.myapplication/files";
    File dir = new File(path);
    if (!dir.isDirectory())
        dir.mkdirs();
    File outFile = new File(path + File.separator + "img.jpg");
    Uri fileUri = Uri.fromFile(outFile);
    intent.putExtra(MediaStore.EXTRA_OUTPUT, fileUri); 
    // set the image file name    
    // start the image capture Intent
    startActivityForResult(intent, CAPTURE_IMAGE_ACTIVITY_REQUEST_CODE);        
}

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data)
{
    if (requestCode==CAPTURE_IMAGE_ACTIVITY_REQUEST_CODE)
    {
         // Image captured and saved to fileUri specified in the Intent
        Uri fn = data.getData();
        Toast.makeText(this, "Image saved to:\n" + fn.toString(), Toast.LENGTH_LONG).show();
    }
}

我在一项活动中称呼这个。现在的问题是,当相机活动出现时,我可以拍多张照片,但我只想拍一张照片,然后返回到调用活动。在我离开相机活动(按“后退”按钮)之前,不会调用onActivityResult。然后data.getData()崩溃。

有什么想法吗?

谢谢 格哈德

2 个答案:

答案 0 :(得分:1)

嗯......这对我来说可以捕捉到图像:

Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
activity.startActivityForResult(intent, AbstractActivity.CAPTURE_IMAGE_ACTIVITY_REQUEST_CODE);

当用户拍照时,会询问用户是否想要接受此图片,然后又回到我的活动中...

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

    if (requestCode == CAPTURE_IMAGE_ACTIVITY_REQUEST_CODE) {
        if (resultCode == RESULT_OK) {
            handleAvatarUpload(data); // which uses Uri selectedImage = data.getData();
        } 
    }
}

我没有收到任何有关此代码的崩溃报告,并且它已经出现了几个月。我们的用户群与我们类别中的其他应用程序一致,其中Android 2.3.3约占用户的71%,2.2为16.35%,2.1为5.7%

答案 1 :(得分:0)

我知道这是一个老问题,但我遇到了同样的问题。

对我而言,它是通过不提供URI而是URI路径myUri.getPath()

来解决的

以下应该做你想做的事:

Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
intent.putExtra(MediaStore.EXTRA_OUTPUT, fileUri.getPath());
startActivityForResult(intent, CAPTURE_IMAGE_ACTIVITY_REQUEST_CODE);