粘滞广播：广播发送出去以后，广播接收者还没有创建，当广播接收者注册的时候就可以接收，如果不是粘滞广播则如果没有广播接收者就以后不能再接收了。

 mainActivity:

package com.sxt.day07_07;import android.app.Activity;import android.content.Intent;import android.os.Bundle;import android.view.View;import android.view.View.OnClickListener;public class MainActivity extends Activity {    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        Intent intent=new Intent("com.sxt.day07_07.my_receiver");        sendStickyBroadcast(intent);//发送粘滞广播，一直停留等着接收者        setListener();    }    private void setListener() {        findViewById(R.id.btnStartSecondActivity).setOnClickListener(new OnClickListener() {            @Override            public void onClick(View v) {                Intent intent2=new Intent(MainActivity.this, SecondActivity.class);                startActivity(intent2);//启动SecondActivity            }        });    }}

SecondActivity

package com.sxt.day07_07;import android.os.Bundle;import android.app.Activity;import android.content.BroadcastReceiver;import android.content.Context;import android.content.Intent;import android.content.IntentFilter;import android.util.Log;import android.view.Menu;public class SecondActivity extends Activity {    MyReceiver mReceiver;    Intent mIntent;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_second);        registerReceiver();    }    private void registerReceiver() {        mReceiver=new MyReceiver();        IntentFilter filter=new IntentFilter("com.sxt.day07_07.my_receiver");        registerReceiver(mReceiver, filter);    }        //内部类，只有SecondActivity启动了，MyReceiver才能注册接收广播。    class MyReceiver extends BroadcastReceiver{        @Override        public void onReceive(Context context, Intent intent) {            Log.i("main","MyReceiver.onReceive()");            mIntent=intent;        }    }    @Override    protected void onDestroy() {        super.onDestroy();        removeStickyBroadcast(mIntent);//移出，移出以后就收不到广播了        unregisterReceiver(mReceiver);//移出接收者    }}

系统描述文件：

     
         
          
        粘滞广播要申请权限    
              
                   
                        
                         
                     
                
               
               
           
      
     

main页面：

second页面：