Android-广播

系统广播以及自定义广播

MainActivity

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.net.ConnectivityManager;
import android.net.Network;
import android.net.NetworkInfo;
import android.support.v4.content.LocalBroadcastManager;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity {

    private IntentFilter intentFilter;

    private LocalReceiver localReceiver;

    private LocalBroadcastManager localBroadcastmanager;

    private NetworkChangeReceiver networkChangeReceiver;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        localBroadcastmanager = LocalBroadcastManager.getInstance(this);
        Button button = (Button) findViewById(R.id.button);
        button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Intent intent = new Intent("com.ldxiaofeng.android.broadcasttest.LOCAL_BROADCAST");
                localBroadcastmanager.sendBroadcast(intent);
                //Intent intent = new Intent("com.ldxiaofeng.android.broadcasttest.MY_BROADCAST");
                //sendOrderedBroadcast(intent,null);
            }
        });

        intentFilter = new IntentFilter();
        intentFilter.addAction("com.ldxiaofeng.android.broadcasttest.LOCAL_BROADCAST");
        localReceiver = new LocalReceiver();
        localBroadcastmanager.registerReceiver(localReceiver,intentFilter);

        //intentFilter.addAction("android.net.conn.CONNECTIVITY_CHANGE");//网络发生变化系统就会发出android.net.conn.CONNECTIVITY_CHANGE的广播
        //networkChangeReceiver = new NetworkChangeReceiver();
        //registerReceiver(networkChangeReceiver,intentFilter);//注册
    }

    class LocalReceiver extends BroadcastReceiver{

        @Override
        public void onReceive(Context context, Intent intent) {
            Toast.makeText(context,"收到本地广播",Toast.LENGTH_SHORT).show();
        }
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        localBroadcastmanager.unregisterReceiver(localReceiver);
        //unregisterReceiver(networkChangeReceiver);//取消注册
    }

    class NetworkChangeReceiver extends BroadcastReceiver{
        @Override
        public void onReceive(Context context, Intent intent) {

            ConnectivityManager connectionManager = (ConnectivityManager)
                    getSystemService(Context.CONNECTIVITY_SERVICE);
            NetworkInfo networkInfo = connectionManager.getActiveNetworkInfo();
            if(networkInfo != null && networkInfo.isAvailable()){
                Toast.makeText(context,"网络已连接",Toast.LENGTH_SHORT).show();
            }else{
                Toast.makeText(context,"网络未连接",Toast.LENGTH_SHORT).show();
            }
        }
    }
}

BootCompleteReceiver

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.widget.Toast;

public class BootCompleteReceiver extends BroadcastReceiver {

    @Override
    public void onReceive(Context context, Intent intent) {
        // TODO: This method is called when the BroadcastReceiver is receiving
        // an Intent broadcast.
        //throw new UnsupportedOperationException("Not yet implemented");
        Toast.makeText(context,"Boot Complete",Toast.LENGTH_SHORT).show();
    }
}

MyBroadcastReceiver

public class MyBroadcastReceiver extends BroadcastReceiver {

    @Override
    public void onReceive(Context context, Intent intent) {
        // TODO: This method is called when the BroadcastReceiver is receiving
        // an Intent broadcast.
        //throw new UnsupportedOperationException("Not yet implemented");
        Toast.makeText(context,"收到广播在1内",Toast.LENGTH_SHORT).show();
        abortBroadcast();
    }
}

activity_main.xml

<LinearLayout 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"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="com.ldxiaofeng.android.broadcasttest.MainActivity">

    <Button
        android:id="@+id/button"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="发送广播"/>

</LinearLayout>