Android(安卓)系统广播动态注册

package com.broadcasttest;    import android.app.Activity;  import android.content.BroadcastReceiver;  import android.content.Context;  import android.content.Intent;  import android.content.IntentFilter;  import android.os.Bundle;  import android.view.View;  import android.view.View.OnClickListener;  import android.widget.Button;  import android.widget.Toast;    public class MainActivity extends Activity {        Button btn = null;            @Override      protected void onCreate(Bundle savedInstanceState) {          super.onCreate(savedInstanceState);          setContentView(R.layout.activity_main);          btn = (Button)findViewById(R.id.sendBroadcasrt);          btn.setOnClickListener(new OnClickListener() {                            public void onClick(View v) {                  Intent intent = new Intent();                  intent.setAction("dynamic_Broadcast");                  intent.putExtra("message", "send Broadcast");                  sendBroadcast(intent);              }          });                              //增加过滤          IntentFilter intentFilter = new IntentFilter();          //增加过滤intent内容          intentFilter.addAction("dynamic_Broadcast");          MyBroadCast mr = new MyBroadCast();          //向系统注册广播接收器 和intent过滤器          this.registerReceiver(mr, intentFilter);                }            //创建自己的广播接收类 实现onReceive方法      class MyBroadCast extends BroadcastReceiver{            public void onReceive(Context context, Intent intent) {              StringBuilder sb = new StringBuilder();              sb.append(intent.getAction()).append(" ,message:").append(intent.getStringExtra("message"));              Toast.makeText(MainActivity.this, sb.toString(), Toast.LENGTH_SHORT).show();                        }                }  }

实例intent 设置信息发送广播。

增加IntentFilter 过滤器过滤广播

向系统注册广播和IntentFilter

实现自己的广播接收器类

在对应的生命周期里注销Broadcast广播过滤器

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