本文實例為大家分享了Android PopupWindow增加半透明蒙層的具體代碼，供大家參考，具體內容如下
先看效果圖：
實現代碼：
BasePopupWindowWithMask.class
package com.example.popupwindowwithmask; import android.content.Context;import android.graphics.PixelFormat;import android.graphics.drawable.ColorDrawable;import android.os.IBinder;import android.view.KeyEvent;import android.view.View;import android.view.WindowManager;import android.widget.PopupWindow; /** * Created by kk on 2017/7/22. */ public abstract class BasePopupWindowWithMask extends PopupWindow { protected Context context; private WindowManager windowManager; private View maskView; public BasePopupWindowWithMask(Context context) { super(context); this.context = context; windowManager = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE); setContentView(initContentView()); setHeight(initHeight()); setWidth(initWidth()); setOutsideTouchable(true); setFocusable(true); setTouchable(true); setBackgroundDrawable(new ColorDrawable()); } protected abstract View initContentView(); protected abstract int initHeight(); protected abstract int initWidth(); @Override public void showAsDropDown(View anchor) { addMask(anchor.getWindowToken()); super.showAsDropDown(anchor); } private void addMask(IBinder token) { WindowManager.LayoutParams wl = new WindowManager.LayoutParams(); wl.width = WindowManager.LayoutParams.MATCH_PARENT; wl.height = WindowManager.LayoutParams.MATCH_PARENT; wl.format = PixelFormat.TRANSLUCENT;//不設置這個彈出框的透明遮罩顯示為黑色 wl.type = WindowManager.LayoutParams.TYPE_APPLICATION_PANEL;//該Type描述的是形成的窗口的層級關系 wl.token = token;//獲取當前Activity中的View中的token,來依附Activity maskView = new View(context); maskView.setBackgroundColor(0x7f000000); maskView.setFitsSystemWindows(false); maskView.setOnKeyListener(new View.OnKeyListener() { @Override public boolean onKey(View v, int keyCode, KeyEvent event) { if (keyCode == KeyEvent.KEYCODE_BACK) { removeMask(); return true; } return false; } }); /** * 通過WindowManager的addView方法創建View，產生出來的View根據WindowManager.LayoutParams屬性不同，效果也就不同了。 * 比如創建系統頂級窗口，實現懸浮窗口效果！ */ windowManager.addView(maskView, wl); } private void removeMask() { if (null != maskView) { windowManager.removeViewImmediate(maskView); maskView = null; } } @Override public void dismiss() { removeMask(); super.dismiss(); }}TestPopupWindow.class
package com.example.popupwindowwithmask; import android.content.Context;import android.view.LayoutInflater;import android.view.View;import android.view.WindowManager; /** * Created by kk on 2017/7/22. */ public class TestPopupWindow extends BasePopupWindowWithMask { private int[] mIds; private View contentView; private OnItemClickListener listener; public interface OnItemClickListener { void OnItemClick(View v); } public void setOnItemClickListener(OnItemClickListener listener) { this.listener = listener; } public TestPopupWindow(Context context, int[] mIds) { super(context); this.mIds = mIds; initListener(); } @Override protected View initContentView() { contentView = LayoutInflater.from(context).inflate(R.layout.pop_layout, null, false); return contentView; } private void initListener() { for (int i = 0; i < mIds.length; i++) { contentView.findViewById(mIds[i]).setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { if (null != listener) { listener.OnItemClick(v); } dismiss(); } }); } } @Override protected int initHeight() { return WindowManager.LayoutParams.WRAP_CONTENT; } @Override protected int initWidth() { return (int) (0.5 * UIUtils.getScreenWidth(context)); }}MainActivity.class
package com.example.popupwindowwithmask; import android.os.Bundle;import android.support.v7.app.AppCompatActivity;import android.view.View;import android.widget.TextView;import android.widget.Toast; public class MainActivity extends AppCompatActivity { private TextView textView; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); textView = (TextView) findViewById(R.id.tv_popup); final TestPopupWindow testPopupWindow = new TestPopupWindow(this, new int[]{R.id.pop_location, R.id.pop_group, R.id.pop_list}); textView.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { testPopupWindow.showAsDropDown(textView); } }); testPopupWindow.setOnItemClickListener(new TestPopupWindow.OnItemClickListener() { @Override public void OnItemClick(View v) { switch (v.getId()) { case R.id.pop_location: Toast.makeText(MainActivity.this, "地址", Toast.LENGTH_SHORT).show(); break; case R.id.pop_group: Toast.makeText(MainActivity.this, "分組", Toast.LENGTH_SHORT).show(); break; case R.id.pop_list: Toast.makeText(MainActivity.this, "清單", Toast.LENGTH_SHORT).show(); break; } } }); }}pop_layout.xml
<?xml version="1.0" encoding="utf-8"?><RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="wrap_content" android:layout_height="wrap_content"> <RelativeLayout android:layout_width="wrap_content" android:layout_height="wrap_content"> <RelativeLayout android:id="@+id/rl_indicator" android:layout_width="match_parent" android:layout_height="wrap_content" android:gravity="center_horizontal"> <ImageView android:layout_width="wrap_content" android:layout_height="12dp" android:scaleType="fitCenter" android:src="@drawable/filter_arrow_up" /> </RelativeLayout> <LinearLayout android:layout_width="wrap_content" android:layout_height="150dp" android:layout_below="@+id/rl_indicator" android:background="@drawable/pop_background" android:gravity="center_horizontal" android:orientation="vertical" android:paddingLeft="15dp" android:paddingRight="15dp"> <TextView android:id="@+id/pop_location" android:layout_width="match_parent" android:layout_height="0dp" android:layout_weight="1" android:drawableLeft="@mipmap/fault_equipment_location_icon" android:drawablePadding="12dp" android:gravity="center_vertical" android:text="地址" android:textColor="#000" android:textSize="16sp" /> <View android:layout_width="match_parent" android:layout_height="0.3dp" android:background="#D2D2D2" /> <TextView android:id="@+id/pop_group" android:layout_width="match_parent" android:layout_height="0dp" android:layout_weight="1" android:drawableLeft="@mipmap/fault_equipment_grouping_icon" android:drawablePadding="12dp" android:gravity="center_vertical" android:text="分組" android:textColor="#000" android:textSize="16sp" /> <View android:layout_width="match_parent" android:layout_height="0.3dp" android:background="#D2D2D2" /> <TextView android:id="@+id/pop_list" android:layout_width="match_parent" android:layout_height="0dp" android:layout_weight="1" android:drawableLeft="@mipmap/fault_equipment_list_icon" android:drawablePadding="12dp" android:gravity="center_vertical" android:text="清單" android:textColor="#000" android:textSize="16sp" /> </LinearLayout> </RelativeLayout></RelativeLayout>
pop_background.xml
<?xml version="1.0" encoding="utf-8"?><shape xmlns:android="http://schemas.android.com/apk/res/android"> <solid android:color="#ffffff" /> <corners android:radius="5dp" /></shape>
UIUtils.class
package com.example.popupwindowwithmask; import android.content.Context; /** * Created by kk on 2017/7/22. */ public class UIUtils { /** * 獲得屏幕寬度 * * @param context * @return */ public static int getScreenWidth(Context context) { return context.getResources().getDisplayMetrics().widthPixels; } /** * 獲得屏幕高度 * * @param context * @return */ public static int getScreenHeight(Context context) { return context.getResources().getDisplayMetrics().heightPixels; } }源碼：下載地址
參考資料：
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