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法律研究如何在Android活动中从通知点击发送参数？
此示例演示了如何从通知点击发送参数到Android活动。
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一个新项目。
步骤 2 - 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" tools :context = ".MainActivity" > <TextView android :id = "@+id/tvNotify" android :layout_width = "match_parent" android :layout_height = "wrap_content" android :layout_above = "@+id/btnNotify" android :layout_margin = "16dp" /> <Button android :id = "@+id/btnNotify" android :layout_width = "match_parent" android :layout_height = "wrap_content" android :layout_centerInParent= "true" android :layout_margin= "16dp" android :onClick= "createNotification" android :text= "create notification" /> </RelativeLayout>
步骤 3 - 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.app.PendingIntent ;
import android.content.Context ;
import android.content.Intent ;
import android.os.Bundle ;
import android.support.v4.app.NotificationCompat ;
import android.support.v7.app.AppCompatActivity ;
import android.view.View ;
import android.widget.TextView ;
public class MainActivity extends AppCompatActivity {
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 ) ;
onNewIntent(getIntent()) ;
}
@Override
protected void onNewIntent (Intent intent) {
super .onNewIntent(intent) ;
Bundle extras = intent.getExtras() ;
if (extras != null ) {
if (extras.containsKey( "NotificationMessage" )) {
String msg = extras.getString( "NotificationMessage" ) ;
TextView tvNotify = findViewById(R.id. tvNotify ) ;
tvNotify.setText(msg) ;
}
}
}
public void createNotification (View view) {
Intent notificationIntent = new Intent(MainActivity. this, MainActivity. class ) ;
notificationIntent.putExtra( "NotificationMessage" , "I am from Notification" ) ;
notificationIntent.addCategory(Intent. CATEGORY_LAUNCHER ) ;
notificationIntent.setAction(Intent. ACTION_MAIN ) ;
notificationIntent.setFlags(Intent. FLAG_ACTIVITY_CLEAR_TOP | Intent. FLAG_ACTIVITY_SINGLE_TOP ) ;
PendingIntent resultIntent = PendingIntent. getActivity (MainActivity. this, 0 , notificationIntent , 0 ) ;
NotificationCompat.Builder mBuilder = new NotificationCompat.Builder
(MainActivity. this, default_notification_channel_id )
.setSmallIcon(R.drawable. ic_launcher_foreground )
.setContentTitle( "Test" )
.setContentText( "Hello! This is my first push notification" )
.setContentIntent(resultIntent) ;
NotificationManager mNotificationManager = (NotificationManager) getSystemService(Context. NOTIFICATION_SERVICE ) ;
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()) ;
}
}步骤 4 - 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" > <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> </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，然后单击工具栏中的运行
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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