【Android Studio】廣播BroadCast

//廣播界面1

package com.jeek.calendar.broadcast;

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

import com.jeek.calendar.R;

public class BroadCastActivity extends AppCompatActivity {

    Button btn;
    TextView tv1;

    private MyBroadcast myBroadcast;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_broad_cast);

        tv1 = (TextView)findViewById(R.id.tv_broadcast1);
        btn = (Button)findViewById(R.id.btn_broadcast1);

        btn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Intent intent = new Intent(BroadCastActivity.this,BroadCast2Activity.class);
                startActivity(intent);
            }
        });

        //使用廣播
        myBroadcast = new MyBroadcast();
        IntentFilter intentFilter = new IntentFilter();
        intentFilter.addAction("com.example.broad");
        LocalBroadcastManager.getInstance(this).registerReceiver(myBroadcast,intentFilter);
    }

    private class MyBroadcast extends BroadcastReceiver{
        @Override
        public void onReceive(Context context, Intent intent) {
            switch (intent.getAction()){
                case "com.example.broad":
                    tv1.setText("123");
                    break;
            }
        }
    }

    @Override
    protected void onDestroy(){
        super.onDestroy();
        //註銷廣播
        LocalBroadcastManager.getInstance(this).unregisterReceiver(myBroadcast);
    }
}

 

//廣播界面2

package com.jeek.calendar.broadcast;

import android.content.Intent;
import android.support.v4.content.LocalBroadcastManager;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;

import com.jeek.calendar.R;

public class BroadCast2Activity extends AppCompatActivity {

    Button btn1;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_broad_cast2);

        btn1= (Button)findViewById(R.id.btn_broadcast1);
        btn1.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Intent intent = new Intent("com.example.broad");
                LocalBroadcastManager.getInstance(BroadCast2Activity.this).sendBroadcast(intent);
            }
        });
    }
}