小尺寸图片问题 [英] small size picture problem

问题描述

在使用ACTION_IMAGE_CAPTURE捕获图片后，如果图片变得非常小，它的分辨率是27X44我使用1.5 Android模拟器，这是代码，我会欣赏任何help：

  myImageButton02.setOnClickListener 
（
 new OnClickListener（）
 {
 @Override 
 public void onClick（View v）
 {
 //创建摄像机意图
意图intent = new Intent（MediaStore.ACTION_IMAGE_CAPTURE）; 
 // Grant 
 intent.addFlags（Intent.FLAG_GRANT_WRITE_URI_PERMISSION）; 
 //保存如果有EXTRA_OUTPUT 
 intent.putExtra（MediaStore.EXTRA_OUTPUT，Uri.fromFile（） new File 
（Environment.getExternalStorageDirectory（），testExtra+ String.valueOf 
（System.currentTimeMillis（））+.jpg））; 
 //启动相机意图并返回图像
 startActivityForResult（intent，1）; 
} 
} 
）; 
 @Override 
 protected void onActivityResult（int requestCode，int resultCode，Intent data）
 {
 super.onActivityResult（requestCode，resultCode，data）; 
 
 //如果Activity被取消，显示一个Toast消息
 if（resultCode == RESULT_CANCELED）
 {
 Toast toast = Toast.makeText已取消，10000）; 
 toast.show（）; 
 return; 
} 
 
 //检查我们是否真的处理图片
 if（requestCode == 1&& resultCode == RESULT_OK）
 {
 String timestamp = Long.toString（System.currentTimeMillis（））; 
 //获取图片
 Bitmap mPicture =（Bitmap）data.getExtras（）。get（data）; 
 //将图像保存到图库
 MediaStore.Images.Media.insertImage（getContentResolver（），mPicture，timestamp，timestamp）; 
} 
} 
} 
  

解决方案>

看看你在做什么：

• 你指定一个你刚刚拍摄的图片存储的路径 intent.putExtra（MediaStore.EXTRA_OUTPUT，Uri.fromFile（new File（Environment.getExternalStorageDirectory（），testExtra+ String.valueOf（System.currentTimeMillis（））+.jpg）））; c>


• 当你访问图片你拖动数据的意图与 Bitmap mPicture =（Bitmap）data.getExtras data）;

显然，您不能从其文件访问图片。据我所知，意图不是设计来承载大量的数据，因为它们在例如活动。你应该做的是打开从相机意图创建的文件的图片。看起来像：

  BitmapFactory.Options bitmapOptions = new BitmapFactory.Options 
 //限制文件大小，因为5MP图片会杀死你的RAM 
 bitmapOptions.inSampleSize = 6; 
 imgBitmap = BitmapFactory.decodeFile（pathToPicture，bitmapOptions）; 
  

它曾经以这种方式为我工作，但我遇到的问题，因为2.1在几个设备上。在Nexus One上运作（静态）。

查看 MediaStore.ACTION_IMAGE_CAPTURE 。

希望这有助于。

谨慎，

Steff

I've got a problem in saving a picture in a full size after capturing it using ACTION_IMAGE_CAPTURE intent the picture become very small , its resolution is 27X44 I'm using 1.5 android emulator, this is the code and I will appreciate any help:

myImageButton02.setOnClickListener
(
    new OnClickListener() 
    {
        @Override
        public void onClick(View v)
        {
            // create camera intent
            Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
            //Grant permission to the camera activity to write the photo.
            intent.addFlags(Intent.FLAG_GRANT_WRITE_URI_PERMISSION);
            //saving if there is EXTRA_OUTPUT
            intent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(new File
            (Environment.getExternalStorageDirectory(), "testExtra" + String.valueOf
            (System.currentTimeMillis()) + ".jpg")));
            // start the camera intent and return the image
            startActivityForResult(intent,1); 
        } 
    }
);
@Override
protected void onActivityResult (int requestCode, int resultCode, Intent data)
{
    super.onActivityResult(requestCode, resultCode, data);

    // if Activity was canceled, display a Toast message
    if (resultCode == RESULT_CANCELED) 
    {
        Toast toast = Toast.makeText(this,"camera cancelled", 10000);
        toast.show();
        return;
    }

    // lets check if we are really dealing with a picture
    if (requestCode == 1 && resultCode == RESULT_OK)
    {
        String timestamp = Long.toString(System.currentTimeMillis());
        // get the picture
        Bitmap mPicture = (Bitmap) data.getExtras().get("data");
        // save image to gallery
        MediaStore.Images.Media.insertImage(getContentResolver(), mPicture, timestamp, timestamp);
    }
}
}

解决方案

Look at what you are doing:

• you specify a path where your just taken picture is stored with intent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(new File (Environment.getExternalStorageDirectory(), "testExtra" + String.valueOf (System.currentTimeMillis()) + ".jpg")));
• when you access the picture you 'drag' the data out of the intent with Bitmap mPicture = (Bitmap) data.getExtras().get("data");

Obviously, you don't access the picture from its file. As far as I know Intents are not designed to carry a large amount of data since they are passed between e.g. Activities. What you should do is open the picture from the file created by the camera intent. Looks like that:

BitmapFactory.Options bitmapOptions = new BitmapFactory.Options();  
// Limit the filesize since 5MP pictures will kill you RAM  
bitmapOptions.inSampleSize = 6;  
imgBitmap = BitmapFactory.decodeFile(pathToPicture, bitmapOptions);

That should do the trick. It used to work for me this way but I am experiencing problems since 2.1 on several devices. Works (still) fine on Nexus One.
Take a look at MediaStore.ACTION_IMAGE_CAPTURE.

Hope this helps.
Regards,
Steff

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