安卓锁屏的实现

MainActivity.java

package com.example.lockscreen;

import android.os.Bundle;
import android.app.Activity;
import android.content.Intent;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;

public class MainActivity extends Activity {
    
	private Button startBt ;
	private Button stopBt;
	
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		initView();
	}

	private void initView() {
		setContentView(R.layout.activity_main);
		this.startBt = (Button)super.findViewById(R.id.startBt);
		this.stopBt  = (Button)super.findViewById(R.id.closeBt);
		this.startBt.setOnClickListener(onClickListener);
		this.stopBt.setOnClickListener(onClickListener);
		
		
	}
	
	
	
	@Override
	public boolean onCreateOptionsMenu(Menu menu) {
		// Inflate the menu; this adds items to the action bar if it is present.
		getMenuInflater().inflate(R.menu.main, menu);
		return true;
	}
	

	private void startservice(){
		Intent intent = new Intent();
		intent.setClass(this, ScreenService.class);
		this.startService(intent);
		
	}
	
	
	private void stopService(){
		Intent intent = new Intent();
		intent.setClass(this, ScreenService.class);
		this.stopService(intent);
	}
	
	private OnClickListener onClickListener = new OnClickListener() {
		
		@Override
		public void onClick(View v) {
		switch (v.getId()) {
		case R.id.startBt:
			startservice();
			break;

		case R.id.closeBt:
			
			stopService();
			break;
		}
			
		}
	};
	
	
	
	

}

package com.example.lockscreen;

import android.app.Activity;
import android.os.Bundle;

public class ScreenOnActivity extends Activity {

	
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		// TODO Auto-generated method stub
		super.onCreate(savedInstanceState);
		super.setContentView(R.layout.screenon);
	}
}