android-Presentation双屏异显

最近碰到一个智能硬件，有两块屏幕，主屏幕和小屏幕，主界面执行各种操作流程，然后小屏幕展示数据，然后做一下数据交互 主要技术是Presentation + eventbus

step1: 清单文件 注册权限

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.user.mathgame">
    <uses-permission android:name= "android.permission.SYSTEM_ALERT_WINDOW" />
    <uses-permission android:name= "android.permission.SYSTEM_OVERLAY_WINDOW"  />

    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/ic_launcher_round"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">
        <activity android:name=".MainActivity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
<!--源码地址 https://github.com/YangHaoyi/MultiScreenDemo.git -->
        <service android:name=".MultiScreenService"/>
    </application>

</manifest>

step2:首页 主界面

package com.example.user.mathgame;


import android.os.Bundle;
import android.support.v4.app.FragmentActivity;
import android.view.View;
import android.widget.Button;
import android.widget.FrameLayout;
import android.widget.TextView;

import org.greenrobot.eventbus.EventBus;


/**
 * @author : YangHaoYi on 2019/1/2.
 * Email  :  [e-mail]
 * Description :多屏显示示例
 * Change : YangHaoYi on 2019/1/2.
 * Version : V 1.0
 * https://github.com/YangHaoyi/MultiScreenDemo.git 源码地址
 */
public class MainActivity extends FragmentActivity implements View.OnClickListener {

    /**
     * 展示第二块屏幕按钮
     **/
    private TextView tvShowPresentation;
    /**
     * Presentation逻辑控制中心
     **/
    private PresentationPresenter presentationPresenter;
    /**
     * 页面根布局
     **/
    private FrameLayout fmActivityContent;
    /** 地图页 **/
//    private MapFrameLayout mapFrameLayout;
    private Button btn_showPresentation;

    /**
     * 搜索页
     **/
//    private SearchFrameLayout searchFrameLayout;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        init();
    }

    /**
     * 初始化
     **/
    private void init() {
        initView();
        initEvent();
    }

    /**
     * 初始化视图
     **/
    private void initView() {
        tvShowPresentation = findViewById(R.id.tvShowPresentation);
        fmActivityContent = findViewById(R.id.fmActivityContent);
        btn_showPresentation= findViewById(R.id.btn_showPresentation);

//        initPage();
    }

 
    private void initEvent() {
        presentationPresenter = new PresentationPresenter();
        tvShowPresentation.setOnClickListener(this);
        btn_showPresentation.setOnClickListener(this);

    }

    @Override
    public void onClick(View v) {
        switch (v.getId()) {
            case R.id.tvShowPresentation:
                presentationPresenter.openSearchPresentation(MainActivity.this);
                break;
            case R.id.btn_showPresentation:
                MapEvent mapEvent = new MapEvent();
                mapEvent.setCode(MapEvent.ZOOM_IN);
                EventBus.getDefault().post(mapEvent);
                break;
            default:
                break;
        }
    }

     
}

step3: eventbus传递的数据类

package com.example.user.mathgame;



/**
 * @author : YangHaoYi on  2019/5/814:17.
 * Email  :  [e-mail]
 * Description :
 * Change : YangHaoYi on  2019/5/814:17.
 * Version : V 1.0
 */
public class MapEvent {

    public static final int ZOOM_IN = 10086;
    public static final int TO_SEARCH = 2;

    private int code;

    public int getCode() {
        return code;
    }

    public void setCode(int code) {
        this.code = code;
    }
}

step4: 服务 用于管理双屏的

package com.example.user.mathgame;


import android.app.Service;
import android.content.Context;
import android.content.Intent;
import android.hardware.display.DisplayManager;
import android.os.Binder;
import android.os.IBinder;
import android.view.Display;
import android.view.WindowManager;

public class MultiScreenService extends Service {
    private DisplayManager mDisplayManager;
    private Display[] displays;
    private SecondScreenPresentation presentation;

    @Override
    public IBinder onBind(Intent intent) {
        return new MultiScreenBinder();
    }

    @Override
    public void onCreate() {
        super.onCreate();
        initPresentation();
    }

    private void initPresentation() {
        if (null == presentation) {
            mDisplayManager = (DisplayManager) this.getSystemService(Context.DISPLAY_SERVICE);
            displays = mDisplayManager.getDisplays();
            if (displays.length > 1) {
                // displays[1]是副屏
                presentation = new SecondScreenPresentation(this, displays[1]);
                presentation.getWindow().setType(WindowManager.LayoutParams.TYPE_APPLICATION_OVERLAY - 1);

            }
        }
    }

    public void showSearchPresentation() {
        presentation.show();
    }

    public class MultiScreenBinder extends Binder {
        public MultiScreenService getService() {
            return MultiScreenService.this;
        }
    }
}

step5: 屏幕管理类

package com.example.user.mathgame;


        import android.app.Activity;
        import android.content.ComponentName;
        import android.content.Context;
        import android.content.Intent;
        import android.content.ServiceConnection;
        import android.os.IBinder;



/**
 * @author : YangHaoYi on  2019/4/30.
 * Email  :  [e-mail]
 * Description :离屏逻辑控制中心
 * Change : YangHaoYi on  2019/4/30.
 * Version : V 1.0
 */
public class PresentationPresenter {

    private MultiScreenService multiScreenService;
    private ServiceConnection serviceConnection = new ServiceConnection() {
        @Override
        public void onServiceConnected(ComponentName name, IBinder service) {
            multiScreenService = ((MultiScreenService.MultiScreenBinder) service).getService();
            //显示第二块屏幕
            multiScreenService.showSearchPresentation();
        }

        @Override
        public void onServiceDisconnected(ComponentName name) {
            //恢复置空
            multiScreenService = null;
        }
    };

    public void openSearchPresentation(Activity activity){
        Intent intent = new Intent(activity,MultiScreenService.class);
        activity.bindService(intent,serviceConnection, Context.BIND_AUTO_CREATE);

    }
}

step6: 第二块屏幕 集成谷歌的Presentation 实现双屏显示

package com.example.user.mathgame;



import android.app.Presentation;
import android.content.Context;
import android.os.Bundle;
import android.util.Log;
import android.view.Display;
import android.widget.FrameLayout;
import android.widget.TextView;

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

/**
 * @author : YangHaoYi on 2019/1/2.
 *         Email  :  [e-mail]
 *         Description :双屏异显辅助屏幕
 *         Change : YangHaoYi on 2019/1/2.
 *         Version : V 1.0
 */
public class SecondScreenPresentation extends Presentation     {

    /** TAG **/
    private static final String TAG = "Presentation";
    /** 根布局 **/
//    private FrameLayout fmContent;

    private TextView tvSearch;


    public SecondScreenPresentation(Context outerContext, Display display) {
        super(outerContext, display);
    }

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

    private void init(){
        initView();
        initEvent();
    }

    private void initView(){
        tvSearch= findViewById(R.id.tvSearch);
//        fmContent = findViewById(R.id.fmContent);
//        initPage();
    }
 


    private void initEvent(){
        windowWidthAndHeightTest();
    }

    private void windowWidthAndHeightTest(){
        int height = getContext().getResources().getDisplayMetrics().heightPixels;
        int width = getContext().getResources().getDisplayMetrics().widthPixels;
        Log.d(TAG,"height_is"+height+"  width_is:"+width);
        System.out.println("SearchPresentation________height_is"+height+"  width_is:"+width);
    }

    /**  EventBus模拟点击  */

    /**  EventBus注册  */
    @Override
    public void show() {
        super.show();
        if(!EventBus.getDefault().isRegistered(this)){
            EventBus.getDefault().register(this);
        }
    }

    /**  EventBus解注册  */
    @Override
    public void dismiss() {
        EventBus.getDefault().unregister(this);
        super.dismiss();
    }


    /**  地图Event事件  */
    @Subscribe
    public void onMapEvent(MapEvent mapEvent){
        tvSearch.setText("onMapEvent:"+mapEvent.getCode());
     
    }
}