Android 将视图保存为 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，它基本上在另一个图像上的图像上叠加一个叠加层，然后我想将带有叠加层的图片保存为 jpg 或 png.基本上这将是我想保存的整个视图.

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.

示例代码会很有帮助.

我尝试了您的建议，但在 Starred Line 处得到了一个空指针.

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();
      }

        }
    }

推荐答案

您可以利用视图的绘图缓存.

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"));

视图是您的视图.95 是 JPG 压缩的质量.文件输出流就是这样.

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

这篇关于Android 将视图保存为 jpg 或 png的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！