本文实例为大家分享了Android音乐播放器锁屏页的具体代码,供大家参考,具体内容如下
首页我们先看一下效果图
下边来说一下实现逻辑,其主要思路就是新建一个activity使其覆盖在锁屏页上边。
一、我们新建一个LockActivty,既然是四大组件之一,必不可少的在AndroidManifest.xml中注册:
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< activity android:name = ".LockActivity" android:excludeFromRecents = "true" android:exported = "false" android:launchMode = "singleInstance" android:noHistory = "true" android:screenOrientation = "portrait" android:taskAffinity = "com.ztk.lock" android:theme = "@style/LockScreenTheme" /> |
这里注意,LockActivty的启动模式,我们使用singleInstance,使其单独存在一个activity task中。
android:exported="false"标签,这个标签是用来表示不能被其他应用程序组件调用或跟它交互。
android:noHistory="true",表示该Activity在task中不留历史痕迹。
style文件如下:
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< style name = "LockScreenTheme" parent = "AppTheme" > < item name = "android:windowIsTranslucent" >true</ item > < item name = "android:windowBackground" >@android:color/transparent</ item > < item name = "android:colorBackgroundCacheHint" >@null</ item > < item name = "android:backgroundDimEnabled" >false</ item > < item name = "android:windowAnimationStyle" >@null</ item > < item name = "android:windowContentOverlay" >@null</ item > </ style > |
二、在LockActivty的onCreate方法中添加标志,使其能够在锁屏页上显示:
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@Override protected void onCreate(Bundle savedInstanceState) { super .onCreate(savedInstanceState); getWindow().addFlags(WindowManager.LayoutParams.FLAG_DISMISS_KEYGUARD | WindowManager.LayoutParams.FLAG_SHOW_WHEN_LOCKED); fullScreen( this ); setContentView(R.layout.activity_lock); } |
这里同时也加入全屏的代码 fullScreen(this):
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public static void fullScreen(Activity activity) { if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) { if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) { //5.x开始需要把颜色设置透明,否则导航栏会呈现系统默认的浅灰色 Window window = activity.getWindow(); View decorView = window.getDecorView(); //两个 flag 要结合使用,表示让应用的主体内容占用系统状态栏的空间 int option = View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN | View.SYSTEM_UI_FLAG_LAYOUT_STABLE; decorView.setSystemUiVisibility(option); window.addFlags(WindowManager.LayoutParams.FLAG_DRAWS_SYSTEM_BAR_BACKGROUNDS); window.setStatusBarColor(Color.TRANSPARENT); } else { Window window = activity.getWindow(); WindowManager.LayoutParams attributes = window.getAttributes(); int flagTranslucentStatus = WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS; attributes.flags |= flagTranslucentStatus; window.setAttributes(attributes); } } } |
三、重写物理返回键使其不能响应返回键。
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@Override public void onBackPressed() {} |
四、向右滑动销毁页面,这里我们要用到触摸反馈的知识,自定义一个SlidingFinishLayout的view 继承RelativeLayout在LockActivity的布局文件中引用,这里重写onTouchEvent方法:
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@Override public boolean onTouchEvent(MotionEvent event) { switch (event.getActionMasked()) { 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) { isSliding = true ; } if (moveX - downX >= 0 && isSliding) { mParentView.scrollBy(deltaX, 0 ); } break ; case MotionEvent.ACTION_UP: i sSliding = false ; if (mParentView.getScrollX() <= -viewWidth / 4 ) { isFinish = true ; scrollRight(); } else { scrollOrigin(); isFinish = false ; } break ; default : break ; } return true ; } |
这里只贴出了主要代码,详细代码请看demo,文章末尾会有demo地址。
五、关于下方滑动解锁text的实现,是利用了颜色渐变器和矩阵平移实现:
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public class HintTextView extends AppCompatTextView { private Paint paint; private int mWidth; private LinearGradient gradient; private Matrix matrix; /** * 渐变的速度 */ private int deltaX; public HintTextView(Context context) { super (context, null ); } public HintTextView(Context context, AttributeSet attrs) { super (context, attrs); } { paint = getPaint(); } @Override protected void onSizeChanged( int w, int h, int oldw, int oldh) { super .onSizeChanged(w, h, oldw, oldh); if (mWidth == 0 ){ mWidth = getMeasuredWidth(); //颜色渐变器 gradient = new LinearGradient( 0 , 0 , mWidth, 0 , new int []{Color.GRAY, Color.WHITE, Color.GRAY}, new float []{ 0 .3f, 0 .5f, 1 .0f}, Shader.TileMode.CLAMP); paint.setShader(gradient); matrix = new Matrix(); } } @Override protected void onDraw(Canvas canvas) { super .onDraw(canvas); if (matrix != null ){ deltaX += mWidth / 8 ; if (deltaX > 2 * mWidth){ deltaX = -mWidth; } } //通过矩阵的平移实现 matrix.setTranslate(deltaX, 0 ); gradient.setLocalMatrix(matrix); postInvalidateDelayed( 100 ); } } |
六、最后我们首先新建一个service做接收锁屏键事件的逻辑,使其启动后在任何页面都可以响应锁屏事件让LockActivity出现在锁屏页面上。
1、在AndroidManifest.xml中注册service:
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< service android:name = ".service.PlayService" android:process = ":main" /> |
2、在service中注册广播接收锁屏事件,并跳转锁屏页面:
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ScreenBroadcastReceiver screenBroadcastReceiver; @Nullable @Override public IBinder onBind(Intent intent) { return null ; } @Override public void onCreate() { super .onCreate(); screenBroadcastReceiver = new ScreenBroadcastReceiver(); final IntentFilter filter = new IntentFilter(); filter.addAction(Intent.ACTION_SCREEN_OFF); registerReceiver(screenBroadcastReceiver, filter); } public class ScreenBroadcastReceiver extends BroadcastReceiver { @Override public void onReceive(Context context, Intent intent) { handleCommandIntent(intent); } } private void handleCommandIntent(Intent intent) { final String action = intent.getAction(); if (Intent.ACTION_SCREEN_OFF.equals(action) ){ Intent lockScreen = new Intent( this , LockActivity. class ); lockScreen.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK); startActivity(lockScreen); } } @Override public void onDestroy() { super .onDestroy(); unregisterReceiver(screenBroadcastReceiver); } |
这样,锁屏页面的实现就大概完成了,有一点要注意的是像小米、vivo、魅族等一些手机会有锁屏显示的权限,默认是关闭的,需要手动打开。
demo地址:LockDemo
以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持服务器之家。
原文链接:https://blog.csdn.net/stil_king/article/details/103648695