Android的保存以JPG或PNG [英] Android save view to jpg or png

问题描述

我想编写一个Android应用程序，基本上层上的另一个图像的图像重叠，然后我想保存的图片与覆盖为JPG或PNG。基本上，这将是整个看法，我想保存。

样品code将是非常有益的。

编辑：

我尝试了您的建议和我得到一个空指针在出演线。

 进口的java.io.File;
进口java.io.FileNotFoundException;
进口java.io.FileOutputStream中;

进口android.app.Activity;
进口android.graphics.Bitmap;
进口android.graphics.Bitmap.Com pressFormat;
进口android.os.Bundle;
进口android.os.Environment;
进口android.widget.LinearLayout;
进口android.widget.TextView;

    公共类EditPhoto延伸活动{
        / **第一次创建活动时调用。 * /
     的LinearLayout LL = NULL;
     TextView的电视= NULL;
        @覆盖
        公共无效的onCreate（包savedInstanceState）{
            super.onCreate（savedInstanceState）;
            的setContentView（R.layout.main）;
            电视=（TextView中）findViewById（R.id.text）;
            LL =（的LinearLayout）findViewById（R.id.layout）;
            ll.setDrawingCacheEnabled（真正的）;
            位图B = ll.getDrawingCache（）;
            文件SD卡= Environment.getExternalStorageDirectory（）;
            档案文件=新的文件（SD卡，image.jpg文件）;
            FileOutputStream中FOS;
      尝试 {
       FOS =新的FileOutputStream（文件）;
       *** b.com preSS（比较pressFormat.JPEG，95，FOS）;
      }赶上（FileNotFoundException异常E）{
       // TODO自动生成的catch块
       e.printStackTrace（）;
      }

        }
    }
 

解决方案

您可以把视图的绘图缓存的优势。

  view.setDrawingCacheEnabled（真正的）;
位图B = view.getDrawingCache（）;
b.com preSS（比较pressFormat.JPEG，95，新的FileOutputStream（/一些/位置/ image.jpg文件））;
 

在哪里查看您的看法。 95是的JPG COM pression质量。和文件输出流就是这样。

I would like to write an android app that basically layers an overlay on image on another image and then I would like to save the picture with the overlay as a jpg or png. Basically this will be the whole view that I would like to save.

Sample code would be very helpful.

EDIT:

I tried out your suggestions and am getting a null pointer at the Starred Line.

 import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;

import android.app.Activity;
import android.graphics.Bitmap;
import android.graphics.Bitmap.CompressFormat;
import android.os.Bundle;
import android.os.Environment;
import android.widget.LinearLayout;
import android.widget.TextView;

    public class EditPhoto extends Activity {
        /** Called when the activity is first created. */
     LinearLayout ll = null;
     TextView tv = null;
        @Override
        public void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.main);
            tv = (TextView) findViewById(R.id.text);
            ll = (LinearLayout) findViewById(R.id.layout);
            ll.setDrawingCacheEnabled(true);
            Bitmap b = ll.getDrawingCache();
            File sdCard = Environment.getExternalStorageDirectory();
            File file = new File(sdCard, "image.jpg");
            FileOutputStream fos;
      try {
       fos = new FileOutputStream(file);
       *** b.compress(CompressFormat.JPEG, 95,fos);
      } catch (FileNotFoundException e) {
       // TODO Auto-generated catch block
       e.printStackTrace();
      }

        }
    }

解决方案

You can take advantage of a View's drawing cache.

view.setDrawingCacheEnabled(true);
Bitmap b = view.getDrawingCache();
b.compress(CompressFormat.JPEG, 95, new FileOutputStream("/some/location/image.jpg"));

Where view is your View. The 95 is the quality of the JPG compression. And the file output stream is just that.

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