Android将视图保存到jpg或png

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.

我想写一个Android应用程序基本上在另一个图像上的图像叠加层，然后我想保存图片与叠加作为jpg或png。基本上这将是我想要保存的整个视图。

Sample code would be very helpful.

示例代码非常有用。

EDIT:

编辑：

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

我尝试了你的建议，并在Starred Line获得一个空指针。

 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();
      }

        }
    }

2 个解决方案

#1

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

您可以利用View的绘图缓存。

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.

视图是您的视图。 95是JPG压缩的质量。而文件输出流就是这样。

#2

File sdCard = Environment.getExternalStorageDirectory();
File file = new File(sdCard, "image.jpg");
FileOutputStream fos = new FileOutputStream(file);

Use fos reference as a 3rd parameter of b.compress() method in Moncader's answer. The image will be stored as image.jpg in root directory of your sd card.

在Moncader的答案中使用fos引用作为b.compress（）方法的第3个参数。图像将作为image.jpg存储在SD卡的根目录中。

#1