Android Api Demos登顶之路（五十一）Notification-->Status Bar

来源：互联网发布：双色球绝密算法编辑：程序博客网时间：2024/06/05 19:12

这个demo演示了notification的不同的显示方式，以及自定义消息的视图、设置默认的状态
activity_main.xml

<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"    android:padding="5dp" >    <TextView        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="Icons only" />    <Button         android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:id="@+id/icon_only"        android:text="Icon Only"/>    <TextView        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="Icons and marquee"        android:layout_marginTop="10dp" />    <Button         android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:id="@+id/icon_marquee"        android:text="Icon And Marquee"/>    <TextView        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="Use remote views in balloon"        android:layout_marginTop="10dp" />    <Button         android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:id="@+id/icon_remoteview"        android:text="Use RemoteView"/>    <TextView        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="Use default values where applicable"        android:layout_marginTop="10dp" />    <LinearLayout         android:layout_width="match_parent"        android:layout_height="wrap_content"        android:orientation="horizontal">        <Button         android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:id="@+id/default_sound"        android:text="Sound"/>        <Button         android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:id="@+id/default_vibrate"        android:text="Vibrate"/>        <Button         android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:id="@+id/default_all"        android:text="All"/>    </LinearLayout>    <Button         android:layout_marginTop="10dp"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:id="@+id/clear"        android:text="Clear Notification"/></LinearLayout>

RemoteView的布局文件：notification_view.xml

<?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="horizontal" >    <ImageView         android:layout_width="60dp"        android:layout_height="60dp"        android:id="@+id/icon"/>    <TextView         android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:id="@+id/text"        android:layout_gravity="center_vertical"        android:text="hello"        android:layout_marginLeft="10dp"/></LinearLayout>

MainActivity

public class MainActivity extends Activity implements OnClickListener {    private NotificationManager nm;    private static final int NOTIFICATION_ID = 0x110;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        Button icon_only = (Button) findViewById(R.id.icon_only);        Button icon_marquee = (Button) findViewById(R.id.icon_marquee);        Button icon_remoteview = (Button) findViewById(R.id.icon_remoteview);        Button default_sound = (Button) findViewById(R.id.default_sound);        Button default_vibrate = (Button) findViewById(R.id.default_vibrate);        Button default_all = (Button) findViewById(R.id.default_all);        Button clear = (Button) findViewById(R.id.clear);        icon_only.setOnClickListener(this);        icon_marquee.setOnClickListener(this);        icon_remoteview.setOnClickListener(this);        default_sound.setOnClickListener(this);        default_vibrate.setOnClickListener(this);        default_all.setOnClickListener(this);        clear.setOnClickListener(this);        nm = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);    }    @Override    public void onClick(View v) {        switch (v.getId()) {        case R.id.icon_only:            showNotification(R.drawable.ic_launcher, "摘要信息", false);            break;        case R.id.icon_marquee:            showNotification(R.drawable.ic_launcher, "摘要信息", true);            break;        case R.id.icon_remoteview:            showViewNotification(R.drawable.icon48x48_2, "摘要信息");            break;        case R.id.default_sound:            showNotificationDefalut(Notification.DEFAULT_SOUND);            break;        case R.id.default_vibrate:            showNotificationDefalut(Notification.DEFAULT_VIBRATE);            break;        case R.id.default_all:            showNotificationDefalut(Notification.DEFAULT_ALL);            break;        case R.id.clear:            nm.cancel(NOTIFICATION_ID);            break;        }    }    private void showNotification(int iconId, String text, boolean showTricker) {        PendingIntent contentIntent = PendingIntent.getActivity(this, 0, new Intent(                this, NotificationDisplay.class), PendingIntent.FLAG_CANCEL_CURRENT);        String trickerText=showTricker ? "显示提示信息":null;        Notification.Builder builder=new Builder(this);        builder.setTicker(trickerText)               .setSmallIcon(iconId)               .setContentIntent(contentIntent)               .setContentTitle("Notification")               .setContentText(text)               .setWhen(System.currentTimeMillis());        Notification noti=builder.build();        nm.notify(NOTIFICATION_ID, noti);    }    private void showViewNotification(int iconId, String text) {        PendingIntent contentIntent = PendingIntent.getActivity(this, 0, new Intent(                this, NotificationDisplay.class), PendingIntent.FLAG_CANCEL_CURRENT);        /*RemoteViews描述一个跨进程显示的View在对 notification的View进行自定义时就必须         * 使用这个类。因为notification的view进程与显示notification的进程是两个不同的进程。         * 使用RemoteViews必须首先定义一个layout的布局文件*/        RemoteViews rv=new RemoteViews(getPackageName(), R.layout.notification_view);        //对RemoteViews中的控件进行简单的赋值        rv.setImageViewResource(R.id.icon, iconId);        rv.setTextViewText(R.id.text, text);        Notification.Builder builder=new Builder(this);        builder.setTicker(text)               .setSmallIcon(R.drawable.ic_launcher)               .setContentIntent(contentIntent)               .setContent(rv);        Notification noti=builder.build();        nm.notify(NOTIFICATION_ID, noti);    }    private void showNotificationDefalut(int defaluts) {        PendingIntent contentIntent = PendingIntent.getActivity(this, 0, new Intent(                this, NotificationDisplay.class), PendingIntent.FLAG_CANCEL_CURRENT);        String trickerText= "显示提示信息";        Notification.Builder builder=new Builder(this);        builder.setTicker(trickerText)               .setSmallIcon(R.drawable.ic_launcher)               .setContentIntent(contentIntent)               .setContentTitle("Notification")               .setContentText("Summary info")               .setWhen(System.currentTimeMillis())               .setDefaults(defaluts);        Notification noti=builder.build();        nm.notify(NOTIFICATION_ID, noti);    }}

在本例中只是使用了一个最简单的textView Activity，这里不再贴代码。
配置文件中配置这个Activity。

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