android截取屏幕圖片

package com.iceman.printscreen;

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

import android.app.Activity;
import android.graphics.Bitmap;
import android.graphics.Bitmap.Config;
import android.os.Bundle;
import android.os.Environment;
import android.view.Display;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.WindowManager;
import android.widget.Button;
import android.widget.LinearLayout;
import android.widget.Toast;

public class PrintScreenDemoActivity extends Activity {
    private Button mButton;
    private LinearLayout mLayout;
    private int mPrintNum;
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        LayoutInflater inf = this.getLayoutInflater();
        mLayout = (LinearLayout)inf.inflate(R.layout.main, null);
        setContentView(mLayout);
        mButton = (Button)findViewById(R.id.print_btn);
        mButton.setOnClickListener(new OnClickListener() {
            public void onClick(View v) {
                GetandSaveCurrentImage();
                mPrintNum++;
                mButton.setText("截屏次數:"+mPrintNum);
            }
        });
    }
    private void GetandSaveCurrentImage()  
    {  
        //1.構建Bitmap  
        WindowManager windowManager = getWindowManager();  
        Display display = windowManager.getDefaultDisplay();  
        int w = display.getWidth();  
        int h = display.getHeight();  
          
        Bitmap Bmp = Bitmap.createBitmap( w, h, Config.ARGB_8888 );      
          
        //2.獲取屏幕  
        View decorview = this.getWindow().getDecorView(); 
        decorview.setDrawingCacheEnabled(true);   
        Bmp = decorview.getDrawingCache();   
        String SavePath = getSDCardPath()+"/PrintScreenDemo/ScreenImage";
      
        //3.保存Bitmap   
        try {  
            File path = new File(SavePath);  
            //文件  
            String filepath = SavePath + "/Screen_"+mPrintNum+".png";  
            File file = new File(filepath);  
            if(!path.exists()){  
                path.mkdirs();  
            }  
            if (!file.exists()) {  
                file.createNewFile();  
            }  
              
            FileOutputStream fos = null;  
            fos = new FileOutputStream(file);  
            if (null != fos) {  
                Bmp.compress(Bitmap.CompressFormat.PNG, 90, fos);  
                fos.flush();  
                fos.close();    
                  
                Toast.makeText(this, "截屏文件已保存至SDCard/PrintScreenDemo/ScreenImage/下", Toast.LENGTH_LONG).show();  
            }  
      
        } catch (Exception e) {  
            e.printStackTrace();  
        }  
    }  
    
       /**
        * 獲取SDCard的目錄路徑功能
        * @return
        */
    private String getSDCardPath(){
        File sdcardDir = null;
        //判斷SDCard是否存在
        boolean sdcardExist = Environment.getExternalStorageState().equals(android.os.Environment.MEDIA_MOUNTED);
        if(sdcardExist){
            sdcardDir = Environment.getExternalStorageDirectory();
        }
       
        return sdcardDir.toString();
    }
}
佈局文件:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >

    <Button
        android:id="@+id/print_btn"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="截屏" />

</LinearLayout>
由於是把截屏的圖片存放到sd卡裡,所以要在manifest.xml文件中增加對sd卡的寫入權限.

 
作者: 陳雨晨 

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