自定義鎖屏實現原理:
1.監聽系統SCREEN_ON與SCREEN_OFF廣播
2.屏幕變暗,啓動自定義鎖屏頁面,使其置頂
3.屏幕點亮,屏蔽系統鎖屏,自定義鎖屏頁面即會出現
技術點:
1.監聽廣播只能使用動態,所以需使用後臺sevice 保持監聽長期有效
注意service保活(JobService等技術)
注意開關機問題(監聽開機廣播,啓動後臺service)
2.自定義鎖屏
推薦使用WindowManager.addView方式
使用activity 注意屏蔽菜單鍵
3.監聽系統消息推送(展示QQ 、微信 等應用推送消息,如不需要可忽略)
1)4.3以上版本使用 NotificationListenerService
繼承並實現onNotificationPost 、onNotifitionRemoved
需要用戶授權
startActivity(new Intent(Settings.ACTION_NOTIFICATION_LISTENER_SETTINGS))
2)4.3一下版本使用 AccessibilityService
關鍵代碼
1.屏蔽系統鎖屏
傳統方案:
KeyguardManager keyguardManager = (KeyguardManager)context.getSystemService(Context.KEYGUARD_SERVICE); KeyguardManager.KeyguardLock lock = keyguardManager.newKeyguardLock(""); lock.disableKeyguard();
最新方案:在自定義鎖屏頁面添加如下代碼
getWindow().addFlags(WindowManager.LayoutParams.FLAG_SHOW_WHEN_LOCKED); getWindow().addFlags(WindowManager.LayoutParams.FLAG_DISMISS_KEYGUARD);
權限添加:
<uses-permission android:name="android.permission.DISABLE_KEYGUARD" />
2.廣播註冊
public class LockerService extends Service { private ScreenOnReceiver screenOnReceiver; private ScreenOffReceiver screenOffReceiver; @Override public void onCreate() { super.onCreate(); //只能動態註冊 screenOnReceiver = new ScreenOnReceiver(); IntentFilter screenOnFilter = new IntentFilter(); screenOnFilter.addAction("android.intent.action.SCREEN_ON"); registerReceiver(screenOnReceiver, screenOnFilter); screenOffReceiver = new ScreenOffReceiver(); IntentFilter screenOffFilter = new IntentFilter(); screenOffFilter.addAction("android.intent.action.SCREEN_OFF"); registerReceiver(screenOffReceiver, screenOffFilter); } @Override public int onStartCommand(Intent intent, int flags, int startId) { return Service.START_STICKY; } /** * 監聽屏幕變亮的廣播接收器,變亮就屏蔽系統鎖屏 * * @author tongleer.com */ private class ScreenOnReceiver extends BroadcastReceiver { @Override public void onReceive(Context context, Intent intent) { String action = intent.getAction(); if (action.equals("android.intent.action.SCREEN_ON")) { /* * 此方式已經過時,在activtiy中編寫 * getWindow().addFlags(WindowManager.LayoutParams.FLAG_SHOW_WHEN_LOCKED); * getWindow().addFlags(WindowManager.LayoutParams.FLAG_DISMISS_KEYGUARD); * 兩句可以代替此方式 */ // KeyguardManager keyguardManager = (KeyguardManager)context.getSystemService(Context.KEYGUARD_SERVICE); // KeyguardManager.KeyguardLock lock = keyguardManager.newKeyguardLock(""); // lock.disableKeyguard(); } } } /** * 監聽屏幕變暗的廣播接收器,變暗就啓動應用鎖屏界面activity * * @author tongleer.com */ private class ScreenOffReceiver extends BroadcastReceiver { @Override public void onReceive(Context context, Intent intent) { String action = intent.getAction(); if (action.equals("android.intent.action.SCREEN_OFF")) { Intent i1 = new Intent(context, LockerActivity.class); i1.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK); startActivity(i1); } } } @Override public void onDestroy() { super.onDestroy(); unregisterReceiver(screenOnReceiver); unregisterReceiver(screenOffReceiver); } @Override public IBinder onBind(Intent intent) { return null; } }
3.自定義鎖屏
public class LockerHelper { private Context mContext; private WindowManager mWindowManager;// 窗口管理器 private View mLockView;// 鎖屏視圖 private WindowManager.LayoutParams wmParams; private static LockerHelper mLockerHelper; private boolean isLocked;// 是否鎖定 public static synchronized LockerHelper getInstance(Context mContext) { if (mLockerHelper == null) { mLockerHelper = new LockerHelper(mContext); } return mLockerHelper; } /** * 構造方法 * @param mContext */ public LockerHelper(Context mContext) { this.mContext = mContext; init(); } /** * 初始化佈局 */ private void init() { isLocked = false; // 獲取WindowManager mWindowManager = (WindowManager) mContext.getApplicationContext().getSystemService(Context.WINDOW_SERVICE); // 設置LayoutParams(全局變量)相關參數 wmParams = new WindowManager.LayoutParams(); boolean isHide= (boolean) SPUtils.get(mContext, Constant.SWITCH_NOTIFICATION,false); wmParams.type = isHide? WindowManager.LayoutParams.TYPE_SYSTEM_ERROR: WindowManager.LayoutParams.TYPE_SYSTEM_ALERT;// 關鍵部分 wmParams.format = PixelFormat.RGBA_8888; // 設置圖片格式,效果爲背景透明 // 設置Window flag wmParams.width = WindowManager.LayoutParams.MATCH_PARENT; wmParams.height = WindowManager.LayoutParams.MATCH_PARENT; wmParams.flags = 1280; } /** * 鎖屏 */ public synchronized void lock() { if (mLockView != null && !isLocked) { mWindowManager.addView(mLockView, wmParams); } isLocked = true; } /** * 解鎖 */ public synchronized void unlock() { if (mWindowManager != null && isLocked) { mWindowManager.removeView(mLockView); } isLocked = false; } /** * 更新 */ public synchronized void update() { if (mLockView != null && !isLocked) { mWindowManager.updateViewLayout(mLockView, wmParams); } } /** * 設置鎖屏視圖 * @param v */ public synchronized void setLockView(View v) { mLockView = v; } }