Android實現音樂播放器鎖屏頁
本文例項為大家分享了Android音樂播放器鎖屏頁的具體程式碼,供大家參考,具體內容如下
首頁我們先看一下效果圖
下邊來說一下實現邏輯,其主要思路就是新建一個activity使其覆蓋在鎖屏頁上邊。
一、我們新建一個LockActivty,既然是四大元件之一,必不可少的在AndroidManifest.xml中註冊:
<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"/>
這裡注意,LockActivty的啟動模式,我們使用singleInstance,使其單獨存在一個activity task中。
android:exported="false"標籤,這個標籤是用來表示不能被其他應用程式元件呼叫或跟它互動。
android:noHistory="true",表示該Activity在task中不留歷史痕跡。
style檔案如下:
<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方法中新增標誌,使其能夠在鎖屏頁上顯示:
@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); }
這裡同時也加入全屏的程式碼fullScreen(this):
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開始需要把顏色設定透明,否則導航欄會呈現系統預設的淺灰色 Window window = activity.getWindow(); View decorView = window.getDecorView(); //兩個 flag 要結合使用,表示讓應用的主體內容佔用系統狀態列的空間 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、重寫物理返回鍵使其不能響應返回鍵。
@Override public void onBackPressed() {}
四、向右滑動銷燬頁面,這裡我們要用到觸控反饋的知識,自定義一個SlidingFinishLayout的view繼承RelativeLayout在LockActivity的佈局檔案中引用,這裡重寫onTouchEvent方法:
@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; }
這裡只貼出了主要程式碼,詳細程式碼請看demo,文章末尾會有demo地址。
五、關於下方滑動解鎖text的實現,是利用了顏色漸變器和矩陣平移實現:
public class HintTextView extends AppCompatTextView { private Paint paint; private int mWidth; private LinearGradient gradient; private Matrix matrix; /** * 漸變的速度 */ 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(); //顏色漸變器 gradient = new LinearGradient(0,mWidth,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; } } //通過矩陣的平移實現 matrix.setTranslate(deltaX,0); gradient.setLocalMatrix(matrix); postInvalidateDelayed(100); } }
六、最後我們首先新建一個service做接收鎖屏鍵事件的邏輯,使其啟動後在任何頁面都可以響應鎖屏事件讓LockActivity出現在鎖屏頁面上。
1、在AndroidManifest.xml中註冊service:
<service android:name=".service.PlayService" android:process=":main" />
2、在service中註冊廣播接收鎖屏事件,並跳轉鎖屏頁面:
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); }
這樣,鎖屏頁面的實現就大概完成了,有一點要注意的是像小米、vivo、魅族等一些手機會有鎖屏顯示的許可權,預設是關閉的,需要手動開啟。
demo地址:LockDemo
以上就是本文的全部內容,希望對大家的學習有所幫助,也希望大家多多支援我們。