功能

1. 实现截取当前屏幕的功能。

2. 把截取的图片保存到SDCard中的某个目录文件夹下面。

Java代码

package com.app.test01;

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.View;

import android.view.View.OnClickListener;

import android.view.WindowManager;

import android.widget.Button;

import android.widget.Toast;

public class JieTu extends Activity {

	private Button btnButton;

	@Override

	protected void onCreate(Bundle savedInstanceState) {

		// TODO Auto-generated method stub

		super.onCreate(savedInstanceState);

		setContentView(R.layout.jietu);

		btnButton = (Button) findViewById(R.id.button1);

		btnButton.setOnClickListener(new OnClickListener() {

			@Override

			public void onClick(View v) {

				// TODO Auto-generated method stub

				GetandSaveCurrentImage();

			}

		});

	}

	/**

	 * 获取和保存当前屏幕的截图

	 */

	private void GetandSaveCurrentImage() {

		// 1.构建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.获取屏幕

		View decorview = this.getWindow().getDecorView();

		decorview.setDrawingCacheEnabled(true);

		Bmp = decorview.getDrawingCache();

		String SavePath = getSDCardPath() + "/AndyDemo/ScreenImage";

		// 3.保存Bitmap

		try {

			File path = new File(SavePath);

			// 文件

			String filepath = SavePath + "/Screen_1.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/AndyDemo/ScreenImage/下",

						Toast.LENGTH_LONG).show();

			}

		} catch (Exception e) {

			e.printStackTrace();

		}

	}

	/**

	 * 获取SDCard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(

				android.os.Environment.MEDIA_MOUNTED);

		if (sdcardExist) {

			sdcardDir = Environment.getExternalStorageDirectory();

		}

		return sdcardDir.toString();

	}

}

添加读写权限

<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>