android的Notification学习

最新推荐文章于 2022-09-19 17:10:50 发布

转载最新推荐文章于 2022-09-19 17:10:50 发布 · 325 阅读

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本文介绍了一个简单的 Android 应用程序示例，展示了如何通过 Service 和 BroadcastReceiver 组件来发送 Notification。该应用包括 Activity、Service 和 BroadcastReceiver 的实现代码，当网络状态改变时会通知用户。

android的Notification学习

activity代码

package com.example.studyreceiver;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;

public class MainActivity extends Activity implements OnClickListener {
    NetworkReceiver mReceiver;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        // Intent intent = getIntent();
        // String data = intent.getStringExtra("data");
        if (mReceiver != null) {
            // unregisterReceiver(mReceiver);
        }
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.activity_main, menu);
        return true;
    }

    @Override
    public void onClick(View v) {
        switch (v.getId()) {
        case R.id.register_receiver:
            this.startService(new Intent(this, ServiceDemo.class));
            break;
        default:
            break;
        }
    }

}

service代码:

package com.example.studyreceiver;

import android.app.Service;
import android.content.Intent;
import android.content.IntentFilter;
import android.net.ConnectivityManager;
import android.os.IBinder;

public class ServiceDemo extends Service {
    NetworkReceiver mReceiver;
    @Override
    public IBinder onBind(Intent intent) {
        return null;
    }

    @Override
    public void onCreate() {
        super.onCreate();
        IntentFilter filter = new IntentFilter(
                ConnectivityManager.CONNECTIVITY_ACTION);
        NetworkReceiver mReceiver = new NetworkReceiver();
        registerReceiver(mReceiver, filter);
    }

    @Override
    public void onDestroy() {
        super.onDestroy();
        unregisterReceiver(mReceiver);
    }

}

receiver代码:

package com.example.studyreceiver;

import android.app.Notification;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.widget.Toast;

public class NetworkReceiver extends BroadcastReceiver {

    protected Context mContext;

    @Override
    public void onReceive(Context context, Intent intent) {

        mContext = context;

        method1();
        // method2(intent);

    }

    private void method1() {
        // 第一种
        ConnectivityManager connectivityManager = (ConnectivityManager) mContext
                .getSystemService(Context.CONNECTIVITY_SERVICE);
        NetworkInfo MOBILENetInfo = connectivityManager
                .getNetworkInfo(ConnectivityManager.TYPE_MOBILE);
        NetworkInfo WIFINetInfo = connectivityManager
                .getNetworkInfo(ConnectivityManager.TYPE_WIFI);
        if (!MOBILENetInfo.isConnected() && !WIFINetInfo.isConnected()) {
            Toast.makeText(mContext, "没用可用的网络 嘿嘿", Toast.LENGTH_SHORT).show();
        } else {
            Toast.makeText(mContext, "有能用的网络呀", Toast.LENGTH_SHORT).show();
            Notification notification = new Notification(
                    R.drawable.ic_launcher, "Notification测试",
                    System.currentTimeMillis());
            NotificationManager notificationManager = (NotificationManager) mContext
                    .getSystemService(Context.NOTIFICATION_SERVICE);
            Intent startintent = new Intent(mContext, MainActivity.class);
            startintent.putExtra("data", "data");
            PendingIntent pendingIntent02 = PendingIntent.getActivity(mContext,
                    0, startintent, 0);
            notification.setLatestEventInfo(mContext, "测试", "有可用的网络呀",
                    pendingIntent02);
            notificationManager.notify(0, notification);
        }

    }
}