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();

}
}

}