有序广播

package com.example.lenovo.guangbo;

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

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
    }
    public void bt_1(View v)
    {
        //发送一般广播
        //使用action属性指定广播频率
        Intent intent=new Intent("com.hanqi.gunagbo.test2");
        intent.putExtra("name","广播发送测试");
        //发送
        sendBroadcast(intent);
        Toast.makeText(MainActivity.this, "一般广播已发出", Toast.LENGTH_SHORT).show();
    }

    MyReceiver myReceiver;
    //动态注册
    public void bt_2(View v)
    {
        myReceiver=new MyReceiver();
        IntentFilter intentFilter = new IntentFilter("com.hanqi.guangbo.test2");
        intentFilter.setPriority(100);
        registerReceiver(myReceiver, intentFilter);
    }
    public void bt_3(View v)
    {
        //发送有序广播
        Intent intent=new Intent("com.hanqi.gunagbo.test1");
        intent.putExtra("name","广播发送测试");
        //发送
        sendOrderedBroadcast(intent, null);
        Toast.makeText(MainActivity.this, "有序广播已发出", Toast.LENGTH_SHORT).show();

    }

    //反注册，onDestroy()
    @Override
    protected void onDestroy() {

        if (myReceiver!=null) {
            unregisterReceiver(myReceiver);
        }
        super.onDestroy();
    }
}

优先级

package com.example.lenovo.guangbo;

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

public class MyReceiver extends BroadcastReceiver {
    public MyReceiver() {
        Log.e("TAG","MyReceiver被实例化");
    }

    @Override
    public void onReceive(Context context, Intent intent) {
        if (isOrderedBroadcast()) {
            //阻断
            abortBroadcast();
        }
       //
        String str=intent.getStringExtra("name");
        intent.putExtra("name1","这是被修改的内容");
        //再重新发送
        //context.sendOrderedBroadcast(intent,null);
        Toast.makeText(context, "MyReceiver1收到的广播："+str, Toast.LENGTH_SHORT).show();
    }
}

package com.example.lenovo.guangbo;

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

public class MyReceiver2 extends BroadcastReceiver {
    public MyReceiver2() {
    }

    @Override
    public void onReceive(Context context, Intent intent) {
        String str=intent.getStringExtra("name1");
        Toast.makeText(context, "MyReceiver2收到的广播：" + str, Toast.LENGTH_SHORT).show();

    }
}

静态优先级

<intent-filter android:priority="1000">

动态优先级

intentFilter.setPriority(100);