eventBus

EventBus

package soexample.umeng.com.eventbusandbutterknife;

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

import org.greenrobot.eventbus.EventBus;
import org.greenrobot.eventbus.Subscribe;
import org.greenrobot.eventbus.ThreadMode;

import soexample.umeng.com.eventbusandbutterknife.eventbean.EventMessage;
import soexample.umeng.com.eventbusandbutterknife.utils.TypeUtils;

/**
 * ButterKnife 他是一个注解框架
 * 找ID设置点击事件
 * 1:需要导入两个依赖
 * 2：下载一个插件
 * 需要解绑
 * <p>
 * 总结内存相关的东西
 * 1：为什么会出现
 * 2：怎么防止
 * 3：如果优化
 * EventBus基于事件总栈 如果你存在了再能收到 post方式
 * EventBus也提供一个方式   粘性事件
 * 发送方式postSticky
 */
public class MainActivity extends AppCompatActivity implements View.OnClickListener {


    private Button Btn_One;
    private Button Btn_Two;
    private Button Btn_Three;
    private TextView get_Content;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        initView();
        EventBus.getDefault().register(this);
    }

    @Subscribe(threadMode = ThreadMode.MAIN)
    public void getInfo(EventMessage message) {
        // Toast.makeText(this, message.toString(), Toast.LENGTH_SHORT).show();
        if (message.getEventType() != 0 && message.getEventType() == TypeUtils.MAIN_EVENT) {
            finish();
        }
    }


    @Override
    protected void onDestroy() {
        super.onDestroy();
        EventBus.getDefault().unregister(this);
    }

    private void initView() {
        Btn_One = (Button) findViewById(R.id.Btn_One);
        Btn_Two = (Button) findViewById(R.id.Btn_Two);
        Btn_Three = (Button) findViewById(R.id.Btn_Three);

        Btn_One.setOnClickListener(this);
        Btn_Two.setOnClickListener(this);
        Btn_Three.setOnClickListener(this);
        get_Content = (TextView) findViewById(R.id.get_Content);
        get_Content.setOnClickListener(this);
    }

    @Override
    public void onClick(View v) {
        switch (v.getId()) {
            case R.id.Btn_One:
                EventBus.getDefault().postSticky(new EventMessage("lxx", "帅", 18, TypeUtils.MAIN_EVENT));
                startActivity(new Intent(this, EventBusDemoActivity.class));
                break;
            case R.id.Btn_Two:

                break;
            case R.id.Btn_Three:

                break;
        }
    }
}

package soexample.umeng.com.eventbusandbutterknife;

import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.TextView;
import android.widget.Toast;


import org.greenrobot.eventbus.EventBus;
import org.greenrobot.eventbus.Subscribe;
import org.greenrobot.eventbus.ThreadMode;

import soexample.umeng.com.eventbusandbutterknife.eventbean.EventMessage;

/**
 * EventsBus 用来做页面直接通信的一个开源框架
 * 基于注解的一个框架
 * 有一个小问题？
 */
public class EventBusDemoActivity extends AppCompatActivity {


    private TextView Event_Text;

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

        initView();

    }
    @Subscribe(threadMode = ThreadMode.MAIN,sticky = true)
    public void getInfo(EventMessage message) {
         Toast.makeText(this, message.toString(), Toast.LENGTH_SHORT).show();
        Event_Text.setText(message.toString());
    }
    private void initView() {
        Event_Text = (TextView) findViewById(R.id.Event_Text);
        Event_Text.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                EventBus.getDefault().register(EventBusDemoActivity.this);
            }
        });
    }
}