小编use*_*689的帖子

我想用在Android中intent打开.camera

我使用了以下代码但是当我按下button(其动作是onclick()功能时,应用程序自行关闭.

 public void onclick(int actionCode){
     Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
     startActivityForResult(takePictureIntent, actionCode);
} 
public static boolean isIntentAvailable(Context context, String action) { 
    final PackageManager packageManager = context.getPackageManager(); 
    final Intent intent = new Intent(action); 
    List<ResolveInfo> list = packageManager.queryIntentActivities(intent, PackageManager.MATCH_DEFAULT_ONLY); 
    return list.size() > 0;
}

如果有人可以帮助我.

我正在制作的这个应用程序正在拍照并将其保存到SD卡但图片未显示在库中......我的代码是否有问题

public void takepicture(View view){
     try{
           String state = Environment.getExternalStorageState();
             if (Environment.MEDIA_MOUNTED.equals(state)) {
                    //To store public files
                File directory=new File(Environment.getExternalStorageDirectory()
                        , "Myapp Pictures");                        
                    if(!directory.exists())
                        directory.mkdir();
                // Create an image file name
                    String timeStamp = 
                        new SimpleDateFormat("yyyyMMdd_HHmmss").format(new Date());
                    String imageFileName = "Img" + timeStamp + ".jpg";
                        file=new File(directory, imageFileName);
                   if(!file.exists())
                       file.createNewFile();                    
             }
    }catch(Exception e){
    e.getCause();   
    }
    Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
    mImageUri=Uri.fromFile(file);
    takePictureIntent.putExtra(MediaStore.EXTRA_OUTPUT, mImageUri);
    startActivityForResult(takePictureIntent, actioncode);          
    }
        protected void onActivityResult(int requestCode, int resultCode, Intent data) {                             
            if(requestCode == actioncode){                  
                    if((file.length())==0){
                        file.delete(); …