使用本地广播

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.os.Bundle;
import android.support.v4.content.LocalBroadcastManager;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;

import com.wangdeqiang.www.chatwithrobot.R;

/**
 * 本地广播的优势
 * 1.明确的知道正在发送的广播不会离开我们的程序,因此不必担心机密数据泄露.
 * 2.其他的程序无法将广播发送到我们程序的内部,因此不需要担心会有安全漏洞的隐患.
 * 3.
 */

public class Main2Activity extends AppCompatActivity {
    private IntentFilter intentFilter;
    **private LocalReceiver localReceiver;
    private LocalBroadcastManager localBroadcastManager;**

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main2);
        localBroadcastManager = LocalBroadcastManager.getInstance(this); //获取实例
        Button button = (Button) findViewById(R.id.button);
        button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent intent = new Intent("com.com.wangdeqiang.www.chatwithrobot.Broadcast.LOCAL_BROADCAST");
                localBroadcastManager.sendBroadcast(intent);//发送本地广播
            }
        });
        intentFilter = new IntentFilter();
        intentFilter.addAction("com.com.wangdeqiang.www.chatwithrobot.Broadcast.LOCAL_BROADCAST");
        localReceiver = new LocalReceiver();
 //注册本地广播接收器localBroadcastManager.registerReceiver(localReceiver,intentFilter);
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        localBroadcastManager.unregisterReceiver(localReceiver);
    }

    private class LocalReceiver extends BroadcastReceiver {
        @Override
        public void onReceive(Context context, Intent intent) {
            Toast.makeText(context,"Receive the local boradcast",Toast.LENGTH_SHORT).show();
        }
    }
}

运行界面如图所示