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我是编程部门的新手。我已经修补了几个小时，但没有得到任何地方。我花了很多时间试图在 stackoverflow 上找到解决方案，这是我第一次提交一个问题。

接下来，我粘贴了 MainActivity.java 文件的内容。我相信我的清单中的所有内容都已正确声明 - 包括写入 SD 卡的权限。大部分代码取自 android API 文档。在运行程序之前，在任何地方都没有发现任何错误。我正在摩托罗拉 Razr Droid 上测试该程序。

单击按钮（rawClick），调用相机实例，我批准图片并且程序崩溃。如果我浏览到我的图片，则会保存图片（文件名不正确）。

关于我在这里可能做错的任何想法？

谢谢。我非常感谢您可以提供的任何帮助。 

import java.io.File;
import java.text.SimpleDateFormat;
import java.util.Date;

import android.app.Activity;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.os.Environment;
import android.provider.MediaStore;
import android.util.Log;
import android.view.View;
import android.widget.Toast;

public class MainActivity extends Activity 
{   

// Variables
private static final int CAPTURE_IMAGE_ACTIVITY_REQUEST_CODE = 100;
public static final int MEDIA_TYPE_IMAGE = 1;
private Uri fileUri;

    @Override
    public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    }    

    public void rawClick(View view) {
    Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE); //set intent         to use camera 

    fileUri = getOutputMediaFileUri(MEDIA_TYPE_IMAGE); // create a file to save the image
    intent.putExtra(MediaStore.EXTRA_OUTPUT, fileUri); // set the image file name


    startActivityForResult(intent, CAPTURE_IMAGE_ACTIVITY_REQUEST_CODE); // start the image capture Intent
}

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        if (requestCode == CAPTURE_IMAGE_ACTIVITY_REQUEST_CODE) {
            if (resultCode == RESULT_OK) {
                // Image captured and saved to fileUri specified in the Intent
                Toast.makeText(this, "Image saved to:\n" +
                         data.getData(), Toast.LENGTH_LONG).show();
            } else if (resultCode == RESULT_CANCELED) {
                // User cancelled the image capture
            } else {
                // Image capture failed, advise user
            }
        }       
    }



    /** Create a file Uri for saving an image or video */
    private static Uri getOutputMediaFileUri(int type){
          return Uri.fromFile(getOutputMediaFile(type));
    }

    /** Create a File for saving an image or video */
    private static File getOutputMediaFile(int type){
        // To be safe, you should check that the SDCard is mounted
        // using Environment.getExternalStorageState() before doing this.

        File mediaStorageDir = new File(Environment.getExternalStoragePublicDirectory(
                  Environment.DIRECTORY_PICTURES), "MyCameraApp");
        // This location works best if you want the created images to be shared
        // between applications and persist after your app has been uninstalled.

        // Create the storage directory if it does not exist
        if (! mediaStorageDir.exists()){
            if (! mediaStorageDir.mkdirs()){
                Log.d("MyCameraApp", "failed to create directory");
                return null;
            }
        }

        // Create a media file name
        String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss").format(new Date());
        File mediaFile;
        if (type == MEDIA_TYPE_IMAGE){
            mediaFile = new File(mediaStorageDir.getPath() + File.separator +
            "IMG_"+ timeStamp + ".jpg");
        } else {
            return null;
        }

        return mediaFile;
    }

}

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