android锁屏页面的实现

android的锁屏页面有两种方法实现；

可参考：http://blog.csdn.net/yangxi_pekin/article/details/50456763

http://blog.csdn.net/yangxi_pekin/article/details/50456763

http://blog.csdn.net/u010696525/article/details/51445515

我参考了他们，写的是一个activity页面当做锁屏页面

1.程序运行后开启一个管理锁屏页面的服务

//开启服务，开启锁屏界面startService(new Intent(MainActivity.this, LockScreenService.class));

2.在这个服务中去开启锁屏页面

public class LockScreenService extends Service {//屏幕熄灭的广播private BroadcastReceiver receiver = new BroadcastReceiver() {@Overridepublic void onReceive(Context context, Intent intent) {if (intent.getAction() == Intent.ACTION_SCREEN_OFF) {Intent lockScreenIntent = new Intent(LockScreenService.this,LockScreenActivity.class);lockScreenIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);if (!BaseApplication.getInstance().getParam(Params.IS_FORBID, false)) {startActivity(lockScreenIntent);}}}};@Overridepublic int onStartCommand(Intent intent, int flags, int startId) {logger.debug("开启锁屏服务");return START_STICKY;};@Overridepublic void onCreate() {IntentFilter filter = new IntentFilter();filter.addAction(Intent.ACTION_SCREEN_OFF);registerReceiver(receiver, filter);}@Overridepublic IBinder onBind(Intent intent) {// TODO Auto-generated method stubreturn null;}@Overridepublic void onDestroy() {unregisterReceiver(receiver);super.onDestroy();Intent localIntent = new Intent();  localIntent.setClass(this, LockScreenService.class); //销毁时重新启动Service  this.startService(localIntent);}}

3.锁屏页面

public class LockScreenActivity extends BaseActivity {/**左右滑动的监听*/private final class OnSildingFinishListenerImplementation implementsOnSildingFinishListener {@Overridepublic void onSildingForward() {LockScreenActivity.this.finish();}@Overridepublic void onSildingBack() {LockScreenActivity.this.finish();}}ImageView iv_right_slip_anim;public static Handler myHandler = new Handler();private boolean isSpeaking = false;@Overridepublic int getLayoutResId() {getWindow().addFlags(WindowManager.LayoutParams.FLAG_DISMISS_KEYGUARD| WindowManager.LayoutParams.FLAG_SHOW_WHEN_LOCKED);//这句话必须写在前面return R.layout.activity_lockscreen;}@Overridepublic void initView() {Bitmap bitmap = BitmapUtil.decodeSampledBitmapFromResource(getResources(), R.drawable.lockscreen_bg, 200, 400);Drawable drawable = BitmapUtil.bitmapToDrawable(bitmap);slf.setBackground(drawable);//设置了锁屏页面的背景色，根据自己的需要进行设置slf.setEnableLeftSildeEvent(true);slf.setEnableRightSildeEvent(false);setRightSlipAnim();}@Overridepublic void initListener() {slf.setOnSildingFinishListener(new OnSildingFinishListenerImplementation());}@Overridepublic void initData() {// TODO Auto-generated method stub}@Overridepublic void doOtherDestroy() {}private void setRightSlipAnim() {iv_right_slip_anim.setImageResource(R.anim.lockscreen_right_slip);AnimationDrawable  animationDrawable = (AnimationDrawable) iv_right_slip_anim.getDrawable();animationDrawable.start();}@Overridepublic void onBackPressed() {// 不做任何事，为了屏蔽back键}

在这个页面注册滑动监听，需要页面跟着手指一起移动，这里用到了一个自定义的布局，作为activity的头布局

4.我的activity的布局文件，头布局要用自定义的布局

<?xml version="1.0" encoding="utf-8"?><***.view.SildingFinishLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:id="@+id/sfl"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:background="@drawable/black">        。。。。。。。。。

5.自定义的可以滑动的布局

/** * 自定义可以滑动的RelativeLayout, 类似于IOS的滑动删除页面效果，当我们要使用 * 此功能的时候，需要将该Activity的顶层布局设置为SildingFinishLayout， */public class SildingFinishLayout extends RelativeLayout{private final String TAG = SildingFinishLayout.class.getName();/** * SildingFinishLayout布局的父布局 */private ViewGroup mParentView;/** * 滑动的最小距离 */private int mTouchSlop;/** * 按下点的X坐标 */private int downX;/** * 按下点的Y坐标 */private int downY;/** * 临时存储X坐标 */private int tempX;/** * 滑动类 */private Scroller mScroller;/** * SildingFinishLayout的宽度 */private int viewWidth;/** * 记录是否正在滑动 */private boolean isSilding;private OnSildingFinishListener onSildingFinishListener;private boolean enableLeftSildeEvent = true; //是否开启左侧切换事件private boolean enableRightSildeEvent = true; // 是否开启右侧切换事件private int size ; //按下时范围(处于这个范围内就启用切换事件，目的是使当用户从左右边界点击时才响应)private boolean isIntercept = false; //是否拦截触摸事件private boolean canSwitch;//是否可切换private boolean isSwitchFromLeft = false; //左侧切换private boolean isSwitchFromRight = false; //右侧侧切换public SildingFinishLayout(Context context) {super(context);init(context);}public SildingFinishLayout(Context context, AttributeSet attrs) {super(context, attrs, 0);init(context);}public SildingFinishLayout(Context context, AttributeSet attrs, int defStyle) {super(context, attrs, defStyle);init(context);}private void init(Context context) {mTouchSlop = ViewConfiguration.get(context).getScaledTouchSlop();Log.i(TAG, "设备的最小滑动距离:" + mTouchSlop);mScroller = new Scroller(context);}@Overrideprotected void onLayout(boolean changed, int l, int t, int r, int b) {super.onLayout(changed, l, t, r, b);if (changed) {// 获取SildingFinishLayout所在布局的父布局mParentView = (ViewGroup) this.getParent();viewWidth = this.getWidth();size = viewWidth;}Log.i(TAG, "viewWidth=" + viewWidth);}public void setEnableLeftSildeEvent(boolean enableLeftSildeEvent) {this.enableLeftSildeEvent = enableLeftSildeEvent;}public void setEnableRightSildeEvent(boolean enableRightSildeEvent) {this.enableRightSildeEvent = enableRightSildeEvent;}/** * 设置OnSildingFinishListener, 在onSildingFinish()方法中finish Activity *  * @param onSildingFinishListener */public void setOnSildingFinishListener(OnSildingFinishListener onSildingFinishListener) {this.onSildingFinishListener = onSildingFinishListener;}//是否拦截事件，如果不拦截事件，对于有滚动的控件的界面将出现问题(相冲突)@Overridepublic boolean onInterceptTouchEvent(MotionEvent ev) {float downX = ev.getRawX();Log.i(TAG, "downX =" + downX + ",viewWidth=" + viewWidth);if(enableLeftSildeEvent && downX < size){Log.e(TAG, "downX 在左侧范围内 ,拦截事件");isIntercept = true;isSwitchFromLeft = true;isSwitchFromRight = false;return false;}else if(enableRightSildeEvent && downX > (viewWidth - size)){//Log.i(TAG, "downX 在右侧范围内 ,拦截事件");isIntercept = true;isSwitchFromRight = true;isSwitchFromLeft = false;return true;}else{//Log.i(TAG, "downX 不在范围内 ,不拦截事件");isIntercept = false;isSwitchFromLeft = false;isSwitchFromRight = false;}return super.onInterceptTouchEvent(ev);}@Overridepublic boolean onTouchEvent(MotionEvent event) {if(!isIntercept){//不拦截事件时 不处理return false;}switch (event.getAction()){case MotionEvent.ACTION_DOWN:downX = tempX = (int) event.getRawX();downY = (int) event.getRawY();break;case MotionEvent.ACTION_MOVE:int moveX = (int) event.getRawX();int deltaX = tempX - moveX;tempX = moveX;if (Math.abs(moveX - downX) > mTouchSlop && Math.abs((int) event.getRawY() - downY) < mTouchSlop) {isSilding = true;}Log.e(TAG, "scroll deltaX=" + deltaX);if(enableLeftSildeEvent){//左侧滑动if (moveX - downX >= 0 && isSilding) {mParentView.scrollBy(deltaX, 0);}}if(enableRightSildeEvent){//右侧滑动if (moveX - downX <= 0 && isSilding) {mParentView.scrollBy(deltaX, 0);}}Log.i(TAG + "/onTouchEvent", "mParentView.getScrollX()=" + mParentView.getScrollX());break;case MotionEvent.ACTION_UP:isSilding = false;//mParentView.getScrollX() <= -viewWidth / 2  ==>指左侧滑动//mParentView.getScrollX() >= viewWidth / 2   ==>指右侧滑动if (mParentView.getScrollX() <= -viewWidth / 2 || mParentView.getScrollX() >= viewWidth / 2) {canSwitch = true;if(isSwitchFromLeft){scrollToRight();}if(isSwitchFromRight){scrollToLeft();}} else {scrollOrigin();canSwitch = false;}break;}return true;}/** * 滚动出界面至右侧 */private void scrollToRight() {final int delta = (viewWidth + mParentView.getScrollX());// 调用startScroll方法来设置一些滚动的参数，我们在computeScroll()方法中调用scrollTo来滚动itemmScroller.startScroll(mParentView.getScrollX(), 0, -delta + 1, 0, Math.abs(delta));postInvalidate();}/** * 滚动出界面至左侧 */private void scrollToLeft() {final int delta = (viewWidth - mParentView.getScrollX());// 调用startScroll方法来设置一些滚动的参数，我们在computeScroll()方法中调用scrollTo来滚动itemmScroller.startScroll(mParentView.getScrollX(), 0, delta - 1, 0, Math.abs(delta));//此处就不可用+1，也不卡直接用deltapostInvalidate();}/** * 滚动到起始位置 */private void scrollOrigin() {int delta = mParentView.getScrollX();mScroller.startScroll(mParentView.getScrollX(), 0, -delta, 0,Math.abs(delta));postInvalidate();}@Overridepublic void computeScroll(){// 调用startScroll的时候scroller.computeScrollOffset()返回true，if (mScroller.computeScrollOffset()) {mParentView.scrollTo(mScroller.getCurrX(), mScroller.getCurrY());postInvalidate();if (mScroller.isFinished()) {if (onSildingFinishListener != null && canSwitch) {Log.i(TAG, "mScroller finish");if(isSwitchFromLeft){//回调，左侧切换事件onSildingFinishListener.onSildingBack();}if(isSwitchFromRight){//右侧切换事件onSildingFinishListener.onSildingForward();}}}}}public interface OnSildingFinishListener {public void onSildingBack();public void onSildingForward();}}

这个布局可以用来分别监听向左、向右滑动，根据自己的需要来写。

6.在清单文件中对锁屏的activity的注册

style的样式：

这个样式可以根据自己的需求来设置。

思路：服务中注册屏幕熄灭广播，发现屏幕熄灭就开启锁屏页面，再次点亮屏幕，滑动锁屏页面，锁屏页面被销毁，进入程序主界面。

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