消息组件的开发和使用

概述MainActivitypackagecom.example.administrator.myapplication;importandroid.provider.Settings;importandroid.support.v7.app.AppCompatActivity;importandroid.os.Bundle;importandroid.annotation.TargetApi;importandroid.app.AlertDialog;importandroi MainActivity

package com.example.administrator.myapplication;import androID.provIDer.Settings;import androID.support.v7.app.AppCompatActivity;import androID.os.Bundle;import androID.annotation.TargetAPI;import androID.app.AlertDialog;import androID.app.Notification;import androID.app.notificationmanager;import androID.os.Build;import androID.vIEw.VIEw;import androID.Widget.button;import androID.Widget.ImageVIEw;import androID.Widget.linearLayout;import androID.Widget.Toast;public class MainActivity extends AppCompatActivity {    private button normalToast, imagetoast;    private button createNotify, deleteNotify;    private int NOTIFICATION_ID = 0x123;    @OverrIDe    protected voID onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentVIEw(R.layout.activity_main);        normalToast = (button) findVIEwByID(R.ID.normalToast);        imagetoast = (button) findVIEwByID(R.ID.imagetoast);        createNotify = (button) findVIEwByID(R.ID.createNotify);        deleteNotify = (button) findVIEwByID(R.ID.deleteNotify);        // 显示普通文本Toast        normalToast.setonClickListener(new VIEw.OnClickListener() {            @OverrIDe            public voID onClick(VIEw v) {                Toast.makeText(MainActivity.this, "普通的Toast信息", Toast.LENGTH_SHORT).show();            }        });        // 显示自定义视图Toast        imagetoast.setonClickListener(new VIEw.OnClickListener() {            @OverrIDe            public voID onClick(VIEw v) {                Toast toast = Toast.makeText(MainActivity.this, "带图片的Toast信息", Toast.LENGTH_SHORT);                VIEw toastVIEw = toast.getVIEw();                ImageVIEw imageVIEw = new ImageVIEw(MainActivity.this);                imageVIEw.setimageResource(R.mipmap.ic_launcher);                linearLayout linearLayout = new linearLayout(MainActivity.this);                linearLayout.setorIEntation(linearLayout.HORIZONTAL);                linearLayout.addVIEw(imageVIEw);                linearLayout.addVIEw(toastVIEw);                toast.setVIEw(linearLayout);                toast.show();            }        });        createNotify.setonClickListener(new VIEw.OnClickListener() {            @TargetAPI(Build.VERSION_CODES.JELLY_BEAN)            @OverrIDe            public voID onClick(VIEw v) {                Notification.Builder builder = new Notification.Builder(MainActivity.this);                builder.setSmallicon(R.mipmap.ic_launcher_round);                builder.setTicker("Notification的提示测试");                builder.setContentTitle("Notification的标题测试");                builder.setContentText("Notification的内容测试");                builder.setWhen(Sy@R_404_6563@.currentTimeMillis());                Notification notification = builder.build();                notification.defaults = Notification.DEFAulT_SOUND;                notificationmanager notificationmanager = (notificationmanager) getSy@R_404_6563@Service(NOTIFICATION_SERVICE);                notificationmanager.notify(NOTIFICATION_ID, notification);            }        });        deleteNotify.setonClickListener(new VIEw.OnClickListener() {            @OverrIDe            public voID onClick(VIEw v) {                notificationmanager notificationmanager=(notificationmanager) getSy@R_404_6563@Service(NOTIFICATION_SERVICE);                notificationmanager.cancel (NOTIFICATION_ID);            }        });    }}

activity_main.xml

<?xml version="1.0" enCoding="utf-8"?><linearLayout xmlns:androID="http://schemas.androID.com/apk/res/androID"    xmlns:tools="http://schemas.androID.com/tools"    androID:layout_wIDth="match_parent"    androID:layout_height="match_parent"    androID:orIEntation="vertical"    tools:context="com.example.administrator.myapplication.MainActivity">    <button        androID:ID="@+ID/normalToast"        androID:layout_wIDth="wrap_content"        androID:layout_height="wrap_content"        androID:text="普通Toast"/>    <button        androID:ID="@+ID/imagetoast"        androID:layout_wIDth="wrap_content"        androID:layout_height="wrap_content"        androID:text="带图片Toast"/>        <button        androID:ID="@+ID/createNotify"        androID:layout_wIDth="wrap_content"        androID:layout_height="wrap_content"        androID:text="创建消息"/>    <button        androID:ID="@+ID/deleteNotify"        androID:layout_wIDth="wrap_content"        androID:layout_height="wrap_content"        androID:text="删除消息"/></linearLayout>

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