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<?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.example.overlay91"> <application android:hasCode="false"></application> <overlay android:targ.

一、系统广播 ​​​​ 1、动态广播 package com.test; import android.app.Activity; import android.content.BroadcastReceiver; import android.content.Context; import android.content.Intent; import android.content.IntentFilter; import android.net.ConnectivityManager;.

简单练习： 一、创建Started service 1. 继承IntentService package com.test; import android.app.IntentService; import android.content.Intent; import android.widget.Toast; import androidx.annotation.Nullable; public class HelloIntentService extends IntentService...

预定义获取联系人 package com.test; import android.app.Activity; import android.content.ContentResolver; import android.content.Intent; import android.content.res.XmlResourceParser; import android.database.Cursor; import android.media.MediaPlayer; import android

xml/customers.xml <?xml version="1.0" encoding="utf-8"?> <customers xmlns:android="http://schemas.android.com/apk/res/android"> <customer name="小明" tel="110" emall="110@qq.com"/> <customer name="小红" tel="120" emall="120@qq.com"/&

package com.texxt; import android.app.Activity; import android.app.AlertDialog; import android.app.Notification; import android.app.NotificationChannel; import android.app.NotificationManager; import android.app.PendingIntent; import android.content.Di.

package com.texxt; import android.app.Activity; import android.app.AlertDialog; import android.app.Notification; import android.app.NotificationChannel; import android.app.NotificationManager; import android.app.PendingIntent; import android.content.Di.

<?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.example.textmethod"> <uses-permission android:name="android.permission.FLASHLIGHT"></uses-permission> &.

styleable.xml <?xml version="1.0" encoding="utf-8"?> <resources> <declare-styleable name="Gallery"> <attr name= "android:galleryItemBackground" /> </declare-styleable> </resources> <?xml version.

<?xml version="1.0" encoding="utf-8"?> <resources> <declare-styleable name="Gallery"> <attr name= "android:galleryItemBackground" /> </declare-styleable> </resources> <?xml version="1.0" encodin.

<?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="match_parent" android:orientation="vertical"> > .

<?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="match_parent" android:orientation="vertical"&.

<?xml version="1.0" encoding="utf-8"?> <androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" xmlns:tools="http://schemas.android.c.

<?xml version="1.0" encoding="utf-8"?> <selector xmlns:android="http://schemas.android.com/apk/res/android"> <item android:state_pressed="true" android:drawable="@drawable/img1"/> <item android:state_pressed="false.

<?xml version="1.0" encoding="utf-8"?> <androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" xmlns:tools="http://schemas.android.c.

import android.app.AlertDialog; import android.app.Fragment; import android.content.DialogInterface; import android.graphics.Color; import android.os.Bundle; import android.util.Log; import android.util.TypedValue; import android.view.Gravity; import and..