Android一键锁屏（附源码）

2013-06-07

无聊弄了个一键锁屏，图片没有处理，生成的apk有点大。签过名的apk

部分代码：

public class MainActivity extends Activity {
private DevicePolicyManager policyManager;
private ComponentName componentName;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//获取设备管理服务
policyManager = (DevicePolicyManager) getSystemService(Context.DEVICE_POLICY_SERVICE);
//AdminReceiver 继承自 DeviceAdminReceiver
componentName = new ComponentName(this, myDeviceAdminReceiver.class);
mylock();
// killMyself ，锁屏之后就立即kill掉我们的Activity，避免资源的浪费;
Intent intent = new Intent(Intent.ACTION_MAIN);
intent.addCategory(Intent.CATEGORY_HOME);
intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
startActivity(intent);
android.os.Process.killProcess(android.os.Process.myPid());
/* ActivityManager activityMgr= (ActivityManager) this.getSystemService(ACTIVITY_SERVICE );
activityMgr.restartPackage(getPackageName());
*/
}
private void mylock(){
boolean active = policyManager.isAdminActive(componentName);
if(!active){//若无权限
activeManage();//去获得权限
policyManager.lockNow();//并锁屏
}
if (active) {
policyManager.lockNow();//直接锁屏
}
}
private void activeManage() {
// 启动设备管理(隐式Intent) - 在AndroidManifest.xml中设定相应过滤器
Intent intent = new Intent(DevicePolicyManager.ACTION_ADD_DEVICE_ADMIN);
//权限列表
intent.putExtra(DevicePolicyManager.EXTRA_DEVICE_ADMIN, componentName);
//描述(additional explanation)
intent.putExtra(DevicePolicyManager.EXTRA_ADD_EXPLANATION, “一键锁屏”);
startActivityForResult(intent, 0);
}
@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;
}
}

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