第一行代码广播代码

在Android 8.0之上 的本地广播

package com.example.p00451131.myapplication;

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

/**
 * 本程序的一些类型
 * 接收器类型：静态
 * 广播类型：标准广播
 * 测试环境：Android 8.0
 * 内容：广播在两个app中接收，并更新UI
 */
public class MainActivity extends AppCompatActivity
{
    boolean flag = true;
    private static MainActivity ins;
    public static MainActivity getinstance(){
        return ins;
    }
    public void updateTextView(){
        MainActivity.this.runOnUiThread(new Runnable()
        {
            @Override
            public void run()
            {
                TextView text = (TextView)findViewById(R.id.text);
                if (flag)
                {
                    text.setVisibility(View.VISIBLE);
                    flag = false;
                }else
                {
                    text.setVisibility(View.INVISIBLE);
                    flag = true;
                }
            }
        });
    }
    @Override
    protected void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        Button button =(Button) findViewById(R.id.button);
        ins = this;
        button.setOnClickListener(new View.OnClickListener()
        {
            @Override
            public void onClick(View view)
            {
                Intent intent = new Intent("com");
                //发送自定义广播到本程序
                intent.setComponent(new ComponentName("com.example.p00451131.myapplication", "com.example.p00451131.myapplication.MyBroadcastReceiver"));
                sendBroadcast(intent);

                //发送自定义静态广播去另外一个程序
                intent.setComponent(new ComponentName("com.example.p00451131.myapplication111","com.example.p00451131.myapplication111.MyReceiver"));
                sendBroadcast(intent);
            }
        });

    }
}

 

 

package com.example.p00451131.myapplication;

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

public class MyBroadcastReceiver extends BroadcastReceiver
{
    @Override
    public void onReceive(Context context, Intent intent)
    {
        // TODO: This method is called when the BroadcastReceiver is receiving
        // an Intent broadcast.
        Log.i("hello", "onReceive:MyBroadcastReceiver ");
        Toast.makeText(context, "recieve an  Broadcast",Toast.LENGTH_SHORT).show();
        MainActivity.getinstance().updateTextView();


    }
}

 

xml中文件