在平常使用音乐播放器时经常会遇到锁屏会显示歌词功能,做的时候也是各种手机不适配,翻阅了网上的文章,发现都是好几年前的,适配的安卓版本比较低,所以我就整合了一下分享给大家.
例如下图:
主要用到的知识点
1.锁屏的广播监听
废话不多说,先上代码
广播接收的方法,用来接收自手机系统广播的开屏锁屏:
public class LockerReceiver extends BroadcastReceiver {private static final String TAG = "LockReceiver";public LockerReceiver() {}@Overridepublic void onReceive(Context context, Intent intent) {String action = intent.getAction();if (!TextUtils.isEmpty(action)) {if (action.equals(Intent.ACTION_POWER_CONNECTED)) {//todo} else if (action.equals(Intent.ACTION_SCREEN_ON)) {} else if (action.equals(Intent.ACTION_SCREEN_OFF)) {Log.e(TAG, "onReceive---" + action);LockScreenActivity.startActivity(context);}}}}
注册一下该广播,可以在某个Activity,也可以在Application,也可以在Service,具体根据自己的业务需求来
private void registerLockerReceiver() {IntentFilter filter = new IntentFilter();filter.addAction(Intent.ACTION_POWER_CONNECTED);filter.addAction(Intent.ACTION_SCREEN_OFF);filter.addAction(Intent.ACTION_SCREEN_ON);lockerReceiver = new LockerReceiver();registerReceiver(lockerReceiver, filter);}
同时也需要在销毁方法里面反注册:
private void unregisterLockerReceiver() {if (lockerReceiver == null) {return;}unregisterReceiver(lockerReceiver);lockerReceiver = null;}
锁屏的Activity需要单独设置window的显示方式:
/*** 显示在锁屏上面* @param window*/private void setLockerWindow(Window window) {WindowManager.LayoutParams lp = window.getAttributes();if (Build.VERSION.SDK_INT > 18) {lp.flags |= WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS;}window.setAttributes(lp);window.getDecorView().setSystemUiVisibility(0x0);window.addFlags(WindowManager.LayoutParams.FLAG_SHOW_WHEN_LOCKED);window.addFlags(WindowManager.LayoutParams.FLAG_DISMISS_KEYGUARD);}
开启该Activity时添加action标明为新的任务,并且要从任务栈中移出:
@NonNullprivate static Intent getIntent(Context context) {Intent screenIntent = new Intent();screenIntent.setClass(context, LockScreenActivity.class);screenIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);screenIntent.addFlags(Intent.FLAG_ACTIVITY_EXCLUDE_FROM_RECENTS);return screenIntent;}
同时清单文件也要设置一些必要的属性:
<activityandroid:name=".LockScreenActivity"android:configChanges="keyboardHidden|orientation|screenSize"android:excludeFromRecents="true"android:exported="true"android:hardwareAccelerated="true"android:launchMode="singleInstance"android:taskAffinity="com.lock.LockScreenActivity"android:theme="@style/LockScreenStyle"android:windowSoftInputMode="stateAlwaysHidden|adjustPan" />
最重要的还是权限:有些10.0手机需要赋予在应用上层显示的权限,有些10.0则不需要,参考喜马拉雅App和酷狗都是需要的
<!--10.0专属,在其他应用上层展示--><uses-permission android:name="android.permission.SYSTEM_ALERT_WINDOW" /><uses-permission android:name="android.permission.WAKE_LOCK" /><uses-permission android:name="android.permission.DISABLE_KEYGUARD" />
附上demo地址:
Android 自定义锁屏Demo
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