Android控件PopupWindow模仿ios底部弹窗

2019-10-23 20:08:51

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来源：转载

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前言

在H5火热的时代，许多框架都出了底部弹窗的控件，在H5被称为弹出菜单ActionSheet，今天我们也来模仿一个ios的底部弹窗，取材于苹果QQ的选择头像功能。

正文

废话不多说，先来个今天要实现的效果图

Android,PopupWindow,ios,弹窗

整个PopupWindow的开启代码

private void openPopupWindow(View v) {  //防止重复按按钮  if (popupWindow != null && popupWindow.isShowing()) {    return;  }  //设置PopupWindow的View  View view = LayoutInflater.from(this).inflate(R.layout.view_popupwindow, null);  popupWindow = new PopupWindow(view, RelativeLayout.LayoutParams.MATCH_PARENT,      RelativeLayout.LayoutParams.WRAP_CONTENT);  //设置背景,这个没什么效果，不添加会报错  popupWindow.setBackgroundDrawable(new BitmapDrawable());  //设置点击弹窗外隐藏自身  popupWindow.setFocusable(true);  popupWindow.setOutsideTouchable(true);  //设置动画  popupWindow.setAnimationStyle(R.style.PopupWindow);  //设置位置  popupWindow.showAtLocation(v, Gravity.BOTTOM, 0, navigationHeight);  //设置消失监听  popupWindow.setOnDismissListener(this);  //设置PopupWindow的View点击事件  setOnPopupViewClick(view);  //设置背景色  setBackgroundAlpha(0.5f);}

步骤分析：

PopupWindow的布局
PopupWindow的创建
PopupWindow添加动画效果
PopupWindow设置背景阴影
PopupWindow监听点击事件
获取NavigationBar的高度

PopupWindow的布局：在Layout中，设计我们需要的布局

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="vertical">  <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_margin="8dp" android:background="@drawable/popup_shape" android:orientation="vertical">    <TextView android:layout_width="match_parent" android:layout_height="wrap_content" android:gravity="center" android:padding="16dp" android:text="你可以将照片上传至照片墙" android:textColor="#666" android:textSize="14sp" />    <View android:layout_width="match_parent" android:layout_height="0.1px" android:background="#888" />    <TextView android:id="@+id/tv_pick_phone" android:layout_width="match_parent" android:layout_height="wrap_content" android:gravity="center" android:padding="16dp" android:text="从手机相册选择" android:textColor="#118" android:textSize="18sp" />    <View android:layout_width="match_parent" android:layout_height="0.1px" android:background="#888" />    <TextView android:id="@+id/tv_pick_zone" android:layout_width="match_parent" android:layout_height="wrap_content" android:gravity="center" android:padding="16dp" android:text="从空间相册选择" android:textColor="#118" android:textSize="18sp" />  </LinearLayout>  <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_margin="8dp" android:background="@drawable/popup_shape">    <TextView android:id="@+id/tv_cancel" android:layout_width="match_parent" android:layout_height="wrap_content" android:gravity="center" android:padding="16dp" android:text="取消" android:textColor="#118" android:textSize="18sp" android:textStyle="bold" />  </LinearLayout></LinearLayout>

其效果是：

Android,PopupWindow,ios,弹窗

PopupWindow的创建：这个创建与我们普通的控件创建方法是一样的

//设置PopupWindow的ViewView view = LayoutInflater.from(this).inflate(R.layout.view_popupwindow, null);popupWindow = new PopupWindow(view, RelativeLayout.LayoutParams.MATCH_PARENT,        RelativeLayout.LayoutParams.WRAP_CONTENT);

PopupWindow添加动画效果：我们创建一个anim文件夹，创建我们的out和in动画效果，然后在style添加我们的动画

<?xml version="1.0" encoding="utf-8"?><!--进入动画--><translate xmlns:android="http://schemas.android.com/apk/res/android" android:interpolator="@android:anim/accelerate_interpolator" android:fromYDelta="100%" android:toYDelta="0" android:duration="200"/><?xml version="1.0" encoding="utf-8"?><!--退出动画--><translate xmlns:android="http://schemas.android.com/apk/res/android" android:interpolator="@android:anim/accelerate_interpolator" android:fromYDelta="0" android:toYDelta="100%" android:duration="200"/><!--弹窗动画--><style name="PopupWindow"> <item name="android:windowEnterAnimation">@anim/window_in</item> <item name="android:windowExitAnimation">@anim/window_out</item> </style>

//设置动画
popupWindow.setAnimationStyle(R.style.PopupWindow);

PopupWindow设置背景阴影：弹窗打开时设置透明度为0.5，弹窗消失时设置透明度为1

//设置屏幕背景透明效果public void setBackgroundAlpha(float alpha) {  WindowManager.LayoutParams lp = getWindow().getAttributes();  lp.alpha = alpha;  getWindow().setAttributes(lp);}

PopupWindow监听点击事件：监听我们PopupWindow里面控件的点击事件

//设置PopupWindow的View点击事件setOnPopupViewClick(view);private void setOnPopupViewClick(View view) {  TextView tv_pick_phone, tv_pick_zone, tv_cancel;  tv_pick_phone = (TextView) view.findViewById(R.id.tv_pick_phone);  tv_pick_zone = (TextView) view.findViewById(R.id.tv_pick_zone);  tv_cancel = (TextView) view.findViewById(R.id.tv_cancel);  tv_pick_phone.setOnClickListener(this);  tv_pick_zone.setOnClickListener(this);  tv_cancel.setOnClickListener(this);}

获取NavigationBar的高度：这里需要适配有些手机没有NavigationBar有些手机有，这里以存在NavigationBar来演示
int resourceId = getResources().getIdentifier("navigation_bar_height", "dimen", "android");
navigationHeight = getResources().getDimensionPixelSize(resourceId);

对存在NavigationBar的手机上，设置其PopupWindow的出现位置
//设置位置
popupWindow.showAtLocation(v, Gravity.BOTTOM, 0, navigationHeight);

对没有NavigationBar的手机上，设置其PopupWindow的出现位置
//设置位置
popupWindow.showAtLocation(v, Gravity.BOTTOM, 0, 0);

源码

Github：https://github.com/AndroidHensen/IOSPopupWindow

public class MainActivity extends AppCompatActivity implements View.OnClickListener, PopupWindow.OnDismissListener {  private Button bt_open;  private PopupWindow popupWindow;  private int navigationHeight;  @Override  protected void onCreate(Bundle savedInstanceState) {    super.onCreate(savedInstanceState);    setContentView(R.layout.activity_main);    bt_open = (Button) findViewById(R.id.bt_open);    bt_open.setOnClickListener(this);    int resourceId = getResources().getIdentifier("navigation_bar_height", "dimen", "android");    navigationHeight = getResources().getDimensionPixelSize(resourceId);  }  @Override  public void onClick(View v) {    switch (v.getId()) {      case R.id.bt_open:        openPopupWindow(v);        break;      case R.id.tv_pick_phone:        Toast.makeText(this, "从手机相册选择", Toast.LENGTH_SHORT).show();        popupWindow.dismiss();        break;      case R.id.tv_pick_zone:        Toast.makeText(this, "从空间相册选择", Toast.LENGTH_SHORT).show();        popupWindow.dismiss();        break;      case R.id.tv_cancel:        popupWindow.dismiss();        break;    }  }  private void openPopupWindow(View v) {    //防止重复按按钮    if (popupWindow != null && popupWindow.isShowing()) {      return;    }    //设置PopupWindow的View    View view = LayoutInflater.from(this).inflate(R.layout.view_popupwindow, null);    popupWindow = new PopupWindow(view, RelativeLayout.LayoutParams.MATCH_PARENT,        RelativeLayout.LayoutParams.WRAP_CONTENT);    //设置背景,这个没什么效果，不添加会报错    popupWindow.setBackgroundDrawable(new BitmapDrawable());    //设置点击弹窗外隐藏自身    popupWindow.setFocusable(true);    popupWindow.setOutsideTouchable(true);    //设置动画    popupWindow.setAnimationStyle(R.style.PopupWindow);    //设置位置    popupWindow.showAtLocation(v, Gravity.BOTTOM, 0, navigationHeight);    //设置消失监听    popupWindow.setOnDismissListener(this);    //设置PopupWindow的View点击事件    setOnPopupViewClick(view);    //设置背景色    setBackgroundAlpha(0.5f);  }  private void setOnPopupViewClick(View view) {    TextView tv_pick_phone, tv_pick_zone, tv_cancel;    tv_pick_phone = (TextView) view.findViewById(R.id.tv_pick_phone);    tv_pick_zone = (TextView) view.findViewById(R.id.tv_pick_zone);    tv_cancel = (TextView) view.findViewById(R.id.tv_cancel);    tv_pick_phone.setOnClickListener(this);    tv_pick_zone.setOnClickListener(this);    tv_cancel.setOnClickListener(this);  }  //设置屏幕背景透明效果  public void setBackgroundAlpha(float alpha) {    WindowManager.LayoutParams lp = getWindow().getAttributes();    lp.alpha = alpha;    getWindow().setAttributes(lp);  }  @Override  public void onDismiss() {    setBackgroundAlpha(1);  }}

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