对于linux驱动比较熟的人来说，这其实是很简单的一个实现。先简单了解下这个过程，方便以后拓展。 先说两种非ROOT的方法 第一种

		MotionEvent evenDownt = MotionEvent.obtain(System.currentTimeMillis(),
				System.currentTimeMillis() + 100, MotionEvent.ACTION_DOWN, 100,
				400, 0);
		dispatchTouchEvent(evenDownt);
		MotionEvent eventUp = MotionEvent.obtain(System.currentTimeMillis(),
				System.currentTimeMillis() + 100, MotionEvent.ACTION_UP, 100,
				400, 0);
		dispatchTouchEvent(eventUp);
		evenDownt.recycle();
		eventUp.recycle();

这种方法仅支持当前的程序，其它的程序是没有任何效果的。
第二种

		// 后台需要系统APP权限，如果你有ROOT权限，可以直接复制本APP到SYSTEM/APP/目录下
		Instrumentation inst = new Instrumentation();
		inst.sendPointerSync(MotionEvent.obtain(SystemClock.uptimeMillis(),
				SystemClock.uptimeMillis(), MotionEvent.ACTION_DOWN, 200, 500,
				0));
		inst.sendPointerSync(MotionEvent.obtain(SystemClock.uptimeMillis(),
				SystemClock.uptimeMillis(), MotionEvent.ACTION_UP, 200, 500, 0));

程序界面显示可以实现点击，但是切换到后台的话会报错。解决方法：后台需要系统APP权限，如果你有ROOT权限，可以直接复制本APP到SYSTEM/APP/目录下，没有ROOT那就使用第一种方法吧。
第三种 系统驱动级的，需要ROOT权限，更直接彻底。只要有ROOT要取，不需要放到SYSTEM/APP下面也可以正常使用。

package com.lee.screenhelper;
import java.io.BufferedReader;
import java.io.DataOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import android.content.Context;
public class Utils {
	private static Utils instance;
	private Utils(Context context) {
		super();
		// TODO Auto-generated constructor stub
		try {
			Runtime.getRuntime().exec("su");
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}
	public static Utils getInstance(Context context) {
		if (instance == null)
			instance = new Utils(context);
		return instance;
	}
	public void screenshot() {
		exec("chmod 777 /dev/graphics/fb0 \n cat /dev/graphics/fb0 > /mnt/sdcard/fb0",
				null);
	}
	public void sendClick(int x, int y) {
		String[] orders = { 
				"sendevent /dev/input/event4 0 0 0",
				"sendevent /dev/input/event4 1 330 1",
				"sendevent /dev/input/event4 3 53 " + x,
				"sendevent /dev/input/event4 3 54 " + y,
				"sendevent /dev/input/event4 0 0 0",
				"sendevent /dev/input/event4 1 330 0",
				"sendevent /dev/input/event4 0 0 0",
				"sendevent /dev/input/event4 0 0 0" };
		exec("su", orders);
	}
	public void sendHome() {
		String[] orders = { 
				"sendevent /dev/input/event1 0 0 0",
				"sendevent /dev/input/event1 1 102 1",
				"sendevent /dev/input/event1 0 0 0",
				"sendevent /dev/input/event1 1 102 0",
				"sendevent /dev/input/event1 0 0 0",
				"sendevent /dev/input/event1 0 0 0" };
		exec("su", orders);
	}
	private void exec(String cmd, String[] orders) {
		try {
			Process process = Runtime.getRuntime().exec(cmd);
			DataOutputStream dataOut = new DataOutputStream(
					process.getOutputStream());
			if (orders != null) {
				for (String order : orders)
					dataOut.writeBytes(order + ";");
			}
			dataOut.flush();
			dataOut.close();
			process.waitFor();
			InputStream in = process.getInputStream();
			BufferedReader bufferReader = new BufferedReader(
					new InputStreamReader(in));
			BufferedReader err = new BufferedReader(new InputStreamReader(
					process.getErrorStream()));
			String line = null;
			while ((line = err.readLine()) != null)
				System.out.println("1.>>>" + line);
			while ((line = bufferReader.readLine()) != null)
				System.out.println("2.>>>" + line);
		} catch (Exception e) {
			e.printStackTrace();
		} finally {
		}
	}
}

下面提供测试代码

package com.androidtouch;
import android.app.Activity;
import android.app.Instrumentation;
import android.os.Bundle;
import android.os.Handler;
import android.os.SystemClock;
import android.view.MotionEvent;
import android.view.Window;
import android.widget.Toast;
public class MainActivity extends Activity {
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		requestWindowFeature(Window.FEATURE_NO_TITLE);
		setContentView(R.layout.activity_main);
		new Handler().postDelayed(new Runnable() {
			@Override
			public void run() {
				// TODO Auto-generated method stub
				setMouseClick();
			}
		}, 5000);
		// test2();
	}
	public void test2() {
		new Thread() {
			@Override
			public void run() {
				// TODO Auto-generated method stub
				super.run();
				try {
					Thread.sleep(5000);
					setMouseClick2();
				} catch (InterruptedException e) {
					// TODO Auto-generated catch block
					e.printStackTrace();
				}
			}
		}.start();
	}
	// 模拟屏幕点击事件 - 只在 Activity 中有用 也可后台使用(本APP，其它无效)
	public void setMouseClick() {
		MotionEvent evenDownt = MotionEvent.obtain(System.currentTimeMillis(),
				System.currentTimeMillis() + 100, MotionEvent.ACTION_DOWN, 100,
				400, 0);
		dispatchTouchEvent(evenDownt);
		MotionEvent eventUp = MotionEvent.obtain(System.currentTimeMillis(),
				System.currentTimeMillis() + 100, MotionEvent.ACTION_UP, 100,
				400, 0);
		dispatchTouchEvent(eventUp);
		evenDownt.recycle();
		eventUp.recycle();
	}
	public void setMouseClick2() {
		// 后台需要系统APP权限，如果你有ROOT权限，可以直接复制本APP到SYSTEM/APP/目录下
		Instrumentation inst = new Instrumentation();
		inst.sendPointerSync(MotionEvent.obtain(SystemClock.uptimeMillis(),
				SystemClock.uptimeMillis(), MotionEvent.ACTION_DOWN, 200, 500,
				0));
		inst.sendPointerSync(MotionEvent.obtain(SystemClock.uptimeMillis(),
				SystemClock.uptimeMillis(), MotionEvent.ACTION_UP, 200, 500, 0));
	}
	@Override
	public boolean onTouchEvent(MotionEvent event) {
		// TODO Auto-generated method stub
		if (event.getAction() == MotionEvent.ACTION_UP)
			Toast.makeText(this, "x:" + event.getX() + " y:" + event.getY(),
					Toast.LENGTH_SHORT).show();
		return super.onTouchEvent(event);
	}
	@Override
	protected void onDestroy() {
		// TODO Auto-generated method stub
		super.onDestroy();
		System.exit(0);
	}
}

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