需求：在主页Activity顶部从上向下滑动出现提示条，且5秒后自动从下向上滑动消失。

自定义布局文件：layout_tips.xml

// layout_tips.xml<LinearLayout      android:layout_width="match_parent"      android:layout_height="120px"      android:paddingStart="20px"      android:paddingEnd="20px"      android:gravity="center"      android:background="#cc000000">    <TextView        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_marginTop="30px"        android:layout_marginBottom="30px"        android:text="提示语"        android:textSize="38px"        android:textColor="@android:color/white"/></LinearLayout>

自定义滑动动画：

<style name="popwindowAnimStyle" parent="android:Animation">    <item name="android:windowEnterAnimation">@anim/anim_popup_show</item>    <item name="android:windowExitAnimation">@anim/anim_popup_exit</item></style>

自定义出现动画：anim_popup_show.xml

<set xmlns:android="http://schemas.android.com/apk/res/android">  <translate    android:fromYDelta="-120%"    android:toYDelta="0"    android:duration="400"/></set>

自定义消失动画：anim_popup_exit.xml

<set xmlns:android="http://schemas.android.com/apk/res/android">  <translate      android:fromYDelta="0"      android:toYDelta="-120%"      android:duration="400"/></set>

一、WindowManager实现

优点：可始终显示在当前Activity内所有Fragment、Dialog之上；
缺点：若切换Activity，则被新Activity覆盖。

View contentView = LayoutInflater.from(this).inflate(R.layout.layout_tips, null);WindowManager windowManager = (WindowManager) getSystemService(Context.WINDOW_SERVICE);if(windowManager != null) {  WindowManager.LayoutParams layoutParams = new WindowManager.LayoutParams();  layoutParams.flags = WindowManager.LayoutParams.FLAG_NOT_TOUCH_MODAL |//不拦截页面点击事件                    WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE |                    WindowManager.LayoutParams.FLAG_NOT_TOUCHABLE;  layoutParams.format = PixelFormat.TRANSLUCENT;  layoutParams.gravity = Gravity.TOP;  layoutParams.y = (int) getResources().getDimension(R.dimen.y30);  layoutParams.height = (int) getResources().getDimension(R.dimen.y119);  layoutParams.windowAnimations = R.style.popwindowAnimStyle;//自定义动画  windowManager.addView(contentView, layoutParams);  new Handler().postDelayed(new Runnable() {      @Override      public void run() {        if(windowManager != null) {        windowManager.removeViewImmediate(contentView);        windowManager = null;      }      }    }, 3000);}

二、PopupWindow实现

缺点：会被当前Activity新出现的Fragment、Dialog覆盖。

View contentView = LayoutInflater.from(this).inflate(R.layout.layout_tips, null);contentView.measure(View.MeasureSpec.UNSPECIFIED, View.MeasureSpec.UNSPECIFIED);DisplayMetrics dm = getResources().getDisplayMetrics();PopupWindow popupWindow = new PopupWindow(contentView, dm.widthPixels - contentView.getPaddingStart() * 2,    (int) getResources().getDimension(R.dimen.y120));popupWindow.setOutsideTouchable(false);//点击外部区域不消失popupWindow.setTouchable(false);popupWindow.setBackgroundDrawable(null);popupWindow.setInputMethodMode(PopupWindow.INPUT_METHOD_NOT_NEEDED);popupWindow.setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_STATE_ALWAYS_HIDDEN);popupWindow.setAnimationStyle(R.style.popwindowAnimStyle);//自定义动画popupWindow.showAtLocation(tvShopDeviceName, Gravity.TOP | Gravity.CENTER_HORIZONTAL,    0, (int) getResources().getDimension(R.dimen.y30));//指定顶部位置new Handler().postDelayed(new Runnable() {  @Override  public void run() {    popupWindow.dismiss();  }}, 3000);

三、Toast实现

优点：可始终显示在屏幕最上层，不被新Activity覆盖；
缺点：Android 7.0后无法自定义显示/隐藏动画，默认为渐隐渐现。

View contentView = LayoutInflater.from(this).inflate(R.layout.layout_tips, null);Toast videoToast = Toast.makeText(this, "", Toast.LENGTH_LONG);videoToast.setGravity(Gravity.TOP | Gravity.CENTER_HORIZONTAL, 0, (int) getResources().getDimension(R.dimen.y30));videoToast.setView(contentView);try {  Object mTN = getField(videoToast, "mTN");  if(mTN != null) {    Object mParams = getField(mTN, "mParams");    if(mParams instanceof WindowManager.LayoutParams) {      WindowManager.LayoutParams params = (WindowManager.LayoutParams) mParams;      //params.windowAnimations = R.style.popwindowAnimStyle;//自定义动画无效      params.width = dm.widthPixels - contentView.getPaddingStart() * 2;      params.height = (int) getResources().getDimension(R.dimen.y120);    }  }} catch (Exception e){  e.printStackTrace();}videoToast.show();private Object getField(Object object, String fieldName)    throws NoSuchFieldException, IllegalAccessException{ Field field = object.getClass().getDeclaredField(fieldName); if(field != null) {   field.setAccessible(true);   return field.get(object); } return null;}

Android顶部弹出提示语的三种实现方式：WindowManager、PopupWindow、Toast

一、WindowManager实现

二、PopupWindow实现

三、Toast实现

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