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法律研究如何在Android中读取所有即将到来的通知？
本例演示了如何在Android中读取所有即将到来的通知
步骤 1 − 在Android Studio中创建一个新项目，转到文件 ⇒ 新建项目，并填写所有必需的详细信息以创建新项目。
步骤 2 − 将以下代码添加到src/MyListener.java
public interface MyListener {
void setValue (String packageName) ;
}步骤 3 − 将以下代码添加到src/MyListener.java
package app.tutorialspoint.com.notifyme ;
import android.content.Context ;
import android.service.notification.NotificationListenerService ;
import android.service.notification.StatusBarNotification ;
import android.util.Log ;
public class NotificationService extends NotificationListenerService {
private String TAG = this .getClass().getSimpleName() ;
Context context ;
static MyListener myListener ;
@Override
public void onCreate () {
super .onCreate() ;
context = getApplicationContext() ;
}
@Override
public void onNotificationPosted (StatusBarNotification sbn) {
Log. i ( TAG , "********** onNotificationPosted" ) ;
Log. i ( TAG , "ID :" + sbn.getId() + " \t " + sbn.getNotification(). tickerText + " \t " + sbn.getPackageName()) ;
myListener .setValue( "Post: " + sbn.getPackageName()) ;
}
@Override
public void onNotificationRemoved (StatusBarNotification sbn) {
Log. i ( TAG , "********** onNotificationRemoved" ) ;
Log. i ( TAG , "ID :" + sbn.getId() + " \t " + sbn.getNotification(). tickerText + " \t " + sbn.getPackageName()) ;
myListener .setValue( "Remove: " + sbn.getPackageName()) ;
}
public void setListener (MyListener myListener) {
NotificationService. myListener = myListener ;
}
}步骤 4 − 将以下代码添加到res/menu/menu_main.xml。
<?xml version = "1.0" encoding = "utf-8" ?> <menu xmlns: android = "http://schemas.android.com/apk/res/android" xmlns: app = "http://schemas.android.com/apk/res-auto" xmlns: tools = "http://schemas.android.com/tools" tools :context = ".MainActivity" > <item android :id = "@+id/action_settings" android :orderInCategory = "100" android :title = "Settings" app :showAsAction = "never" /> </menu>
步骤 5 − 将以下代码添加到res/layout/activity_main.xml。
<? xml version = "1.0" encoding = "utf-8" ?> <RelativeLayout 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 :padding = "16dp" tools :context = ".MainActivity" > <Button android :id = "@+id/btnCreateNotification" android :layout_width = "wrap_content" android :layout_height = "wrap_content" android :layout_alignParentStart = "true" android :layout_alignParentTop = "true" android :layout_alignParentEnd = "true" android :text = "Create Notification" /> <ScrollView android :layout_width = "match_parent" android :layout_height = "match_parent" android :layout_below = "@+id/btnCreateNotification" android :layout_alignStart = "@+id/btnCreateNotification" android :layout_alignEnd = "@+id/btnCreateNotification" android :layout_alignParentBottom = "true" > <TextView android :id = "@+id/textView" android :layout_width = "match_parent" android :layout_height = "wrap_content" android :text = "NotificationListenerService Example" android :textAppearance = "?android:attr/textAppearanceMedium" /> </ScrollView> </RelativeLayout>
步骤 6 − 将以下代码添加到src/MainActivity.java
package app.tutorialspoint.com.notifyme ;
import android.app.NotificationChannel ;
import android.app.NotificationManager ;
import android.content.Intent ;
import android.os.Bundle ;
import android.support.v4.app.NotificationCompat ;
import android.support.v7.app.AppCompatActivity ;
import android.view.Menu ;
import android.view.MenuItem ;
import android.view.View ;
import android.widget.Button ;
import android.widget.TextView ;
public class MainActivity extends AppCompatActivity implements MyListener {
private TextView txtView ;
public static final String NOTIFICATION_CHANNEL_ID = "10001" ;
private final static String default_notification_channel_id = "default" ;
@Override
protected void onCreate (Bundle savedInstanceState) {
super .onCreate(savedInstanceState) ;
setContentView(R.layout. activity_main ) ;
new NotificationService().setListener( this ) ;
txtView = findViewById(R.id. textView ) ;
Button btnCreateNotification = findViewById(R.id. btnCreateNotification ) ;
btnCreateNotification.setOnClickListener( new View.OnClickListener() {
@Override
public void onClick (View v) {
NotificationManager mNotificationManager = (NotificationManager) getSystemService( NOTIFICATION_SERVICE ) ;
NotificationCompat.Builder mBuilder = new NotificationCompat.Builder(MainActivity. this, default_notification_channel_id ) ;
mBuilder.setContentTitle( "My Notification" ) ;
mBuilder.setContentText( "Notification Listener Service Example" ) ;
mBuilder.setTicker( "Notification Listener Service Example" ) ;
mBuilder.setSmallIcon(R.drawable. ic_launcher_foreground ) ;
mBuilder.setAutoCancel( true ) ;
if (android.os.Build.VERSION. SDK_INT >= android.os.Build.VERSION_CODES. O ) {
int importance = NotificationManager. IMPORTANCE_HIGH ;
NotificationChannel notificationChannel = new NotificationChannel( NOTIFICATION_CHANNEL_ID , "NOTIFICATION_CHANNEL_NAME" , importance) ;
mBuilder.setChannelId( NOTIFICATION_CHANNEL_ID ) ;
assert mNotificationManager != null;
mNotificationManager.createNotificationChannel(notificationChannel) ;
}
assert mNotificationManager != null;
mNotificationManager.notify(( int ) System. currentTimeMillis () , mBuilder.build()) ;
}
}) ;
}
@Override
public boolean onCreateOptionsMenu (Menu menu) {
getMenuInflater().inflate(R.menu. menu_main , menu) ; //Menu Resource, Menu
return true;
}
@Override
public boolean onOptionsItemSelected (MenuItem item) {
switch (item.getItemId()) {
case R.id. action_settings :
Intent intent = new Intent("android.settings.ACTION_NOTIFICATION_LISTENER_SETTINGS" ) ;
startActivity(intent) ;
return true;
default :
return super .onOptionsItemSelected(item) ;
}
}
@Override
public void setValue (String packageName) {
txtView .append( "
" + packageName) ;
}
}步骤 7 − 将以下代码添加到AndroidManifest.xml
<? xml version = "1.0" encoding = "utf-8" ?> <manifest xmlns: android = "http://schemas.android.com/apk/res/android" package = "app.tutorialspoint.com.notifyme" > <uses-permission android :name = "android.permission.VIBRATE" /> <application android :allowBackup = "true" android :icon = "@mipmap/ic_launcher" android :label = "@string/app_name" android :roundIcon = "@mipmap/ic_launcher_round" android :supportsRtl = "true" android :theme = "@style/AppTheme" > <activity android :name = ".MainActivity" > <intent-filter> <action android :name = "android.intent.action.MAIN" /> <category android :name = "android.intent.category.LAUNCHER" /> </intent-filter> </activity> <service android :name = ".NotificationService" android :label = "@string/app_name" android :permission = "android.permission.BIND_NOTIFICATION_LISTENER_SERVICE" > <intent-filter> <action android :name = "android.service.notification.NotificationListenerService" /> </intent-filter> </service> </application> </manifest>
让我们尝试运行您的应用程序。我假设您已将您的实际Android移动设备连接到您的计算机。要从Android Studio运行应用程序，请打开您的一个项目活动文件，然后单击运行
工具栏中的图标。选择您的移动设备作为选项，然后检查您的移动设备，它将显示您的默认屏幕 −
点击 这里 下载项目代码
更新于：2019年7月30日
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