Android广播的发送与接收

  一、静态注册（在manifest文件中进行注册）

1、广播发送

package com.example.administrator.myapplication;

import android.content.Intent;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.View;

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        findViewById(R.id.btn_send_broadcast).setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {

                /**
                 *     1、不传递数据
                 * */
                //Intent intent = new Intent("com.example.administrator.myapplication.MY_BROADCAST");

                /**
                 *      2、传递数据
                 * */
                Intent intent = new Intent();
                intent.setAction("com.example.administrator.myapplication.MY_BROADCAST");
                intent.putExtra("name", "xiaoming");
                intent.putExtra("age",30);
                intent.putExtra("height",1.75);

                //发送广播
                sendBroadcast(intent);
            }
        });
    }

}
           

2、在manifest文件中注册

<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>

        <receiver android:name=".MyBroadcastReceiver"
            android:enabled="true"
            android:exported="true">
            <intent-filter>
                <action android:name="com.example.administrator.myapplication.MY_BROADCAST"/>
            </intent-filter>
        </receiver>

    </application>
           

3、广播的接收

package com.example.administrator.myapplication;

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

/**
 * Created by Administrator on 2017/5/10 0010.
 */

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

        //Toast.makeText(context,"receive in my broadcastReceiver",Toast.LENGTH_LONG).show();

        String name = intent.getStringExtra("name");
        int age = intent.getIntExtra("age",0);
        double height = intent.getDoubleExtra("height",0.0);

        Toast.makeText(context,"name="+name+",age="+age+"height="+height,Toast.LENGTH_LONG).show();
    }
}
           

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二、动态注册（通过代码进行注册）

package com.example.administrator.myapplication;

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity {

    IntentFilter intentFilter ;
    MyBroadcastReceiver myBroadcastReceiver;


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        //动态注册接收器
        intentFilter = new IntentFilter();
        intentFilter.addAction("com.example.administrator.myapplication.MY_BROADCAST");
        myBroadcastReceiver = new MyBroadcastReceiver();
        registerReceiver(myBroadcastReceiver,intentFilter);



        findViewById(R.id.btn_send_broadcast).setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {

                //发送广播
                Intent intent = new Intent();
                intent.setAction("com.example.administrator.myapplication.MY_BROADCAST");
                intent.putExtra("name", "xiaoming");
                sendBroadcast(intent);
            }
        });
    }



    //接收广播
    public class MyBroadcastReceiver extends BroadcastReceiver {

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

            String name = intent.getStringExtra("name");
            Toast.makeText(context,"name="+name,Toast.LENGTH_LONG).show();

        }
    }

}