Android截取当前屏幕保存到外部设备上

要保存屏幕首先要获取当前窗口信息，再以流的形式转成图片写入到文件保存起来，文件的命名可以根据当前时间。

package com.example.capture2sd;import java.io.File;import java.io.FileOutputStream;import java.io.IOException;import java.util.Calendar;import android.app.Activity;import android.content.ContentResolver;import android.graphics.Bitmap;import android.graphics.Bitmap.Config;import android.graphics.Point;import android.os.Bundle;import android.os.Environment;import android.view.Display;import android.view.View;import android.view.View.OnClickListener;import android.view.WindowManager;import android.widget.Button;import android.widget.Toast;/** * 1. 实现截取当前屏幕的功能。 * 2. 把截取的图片保存到个部设备中的某个目录文件夹下面。 *  * @author Administrator *  */public class MainActivity extends Activity {private Button btn = null;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.main);btn = (Button) findViewById(R.id.GetPic);btn.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View v) {// TODO Auto-generated method stubGetAndSaveCurrentImage();}});}/** * 获取和保存当前屏幕的截图 */private void GetAndSaveCurrentImage() {// 1.构建BitmapWindowManager windowManager = getWindowManager();Display display = windowManager.getDefaultDisplay();Point pt = new Point();display.getSize(pt);Bitmap Bmp = Bitmap.createBitmap(pt.x, pt.y, Config.ARGB_8888);// 2.获取屏幕View decorview = getWindow().getDecorView();decorview.setDrawingCacheEnabled(true);Bmp = decorview.getDrawingCache();// 保存路径String SavePath = getSDCardPath() + File.separator + "ScreenImage";FileOutputStream fos = null;// 3.保存Bitmaptry {// 创建目录File path = new File(SavePath);// 文件名String filepath = SavePath + File.separator + getCurTime() + ".png";System.out.println(filepath);File file = new File(filepath);// 目录如果不存在就创建目录if (!path.exists()) {path.mkdirs();}// 文件不存在就创建文件if (!file.exists()) {file.createNewFile();}fos = new FileOutputStream(file);// 把获取的图片写入文件if (null != fos) {Bmp.compress(Bitmap.CompressFormat.PNG, 90, fos);fos.flush();Toast.makeText(this, "截屏文件已保存至:" + path.toString(),Toast.LENGTH_LONG).show();}} catch (Exception e) {System.out.println("----------Exception");try {if (fos != null)fos.close();} catch (IOException e1) {// TODO Auto-generated catch blocke1.printStackTrace();}e.printStackTrace();}}/** * 获取当前时间，以当前时间来作为文件名保存 *  * @return */private String getCurTime() {ContentResolver cv = this.getContentResolver();String strTimeFormat = android.provider.Settings.System.getString(cv,android.provider.Settings.System.TIME_12_24);// 判断是不是24小时制if (strTimeFormat.equals("24")) {System.out.println("---------24");} else {System.out.println("---------12");}Calendar c = Calendar.getInstance();int year = c.get(Calendar.YEAR);int month = c.get(Calendar.MONTH);int day = c.get(Calendar.DAY_OF_MONTH);int hour = c.get(Calendar.HOUR_OF_DAY);int minute = c.get(Calendar.MINUTE);int sec = c.get(Calendar.SECOND);// 文件名String strCurr = String.format("%04d%02d%02d_%02d%02d%02d", year,month, day, hour, minute, sec);return strCurr;}/** * 获取外部设备的目录路径功能 */private String getSDCardPath() {File sdcardDir = null;// 判断SDCard是否存在boolean sdcardExist = Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED);if (sdcardExist) {sdcardDir = Environment.getExternalStorageDirectory();}return sdcardDir.toString();}}

Demo下载

点击打开链接