DemoApplication.java

package com.fanxin.huangfangyi;

import android.app.Activity;
import android.app.Application;
import android.content.Context;
import android.os.Build;
import android.support.multidex.MultiDex;
import android.util.DisplayMetrics;

import com.alibaba.fastjson.JSONObject;
import com.easemob.redpacketsdk.RedPacket;
import com.facebook.drawee.backends.pipeline.Fresco;
import com.fanxin.huangfangyi.main.db.TopUser;
import com.fanxin.huangfangyi.main.db.TopUserDao;
import com.fanxin.huangfangyi.main.utils.CrashHandler;
import com.fanxin.huangfangyi.main.utils.GroupUitls;
import com.fanxin.huangfangyi.main.utils.LocalDataUtils;
import com.fanxin.huangfangyi.main.utils.OkHttpManager;
 import com.tencent.bugly.crashreport.CrashReport;
import com.ucloud.live.UEasyStreaming;

import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.Random;


public class DemoApplication extends Application {

	public static Context applicationContext;
	private static DemoApplication instance;
	// login user name
	public final String PREF_USERNAME = "username";
	public static String currentUserNick = "";
	private JSONObject userJson;
	private  Map<String, TopUser> topUsers;
	private String time="";

	private DisplayMetrics displayMetrics = null;
	private List<Activity> activities=new ArrayList<>();
	public static DemoApplication getApp() {
		if (instance != null && instance instanceof DemoApplication) {
			return (DemoApplication) instance;
		} else {
			instance = new DemoApplication();
			instance.onCreate();
			return (DemoApplication) instance;
		}
	}

	public static boolean sRunningOnIceCreamSandwich;

	static {
		sRunningOnIceCreamSandwich = Build.VERSION.SDK_INT >= Build.VERSION_CODES.ICE_CREAM_SANDWICH;
	}
	@Override
	public void onCreate() {
		MultiDex.install(this);
		super.onCreate();
        applicationContext = this;
        instance = this;
		OkHttpManager.init(instance);
		LocalDataUtils.init(instance);
        DemoHelper.getInstance().init(applicationContext);
		//red packet code : 初始化红包上下文，开启日志输出开关
		RedPacket.getInstance().initContext(applicationContext);
		RedPacket.getInstance().setDebugMode(true);
		Fresco.initialize(this);
		UEasyStreaming.initStreaming("publish3-key");
		UEasyStreaming.syncMobileConfig(this, 3600 * 24);
		CrashReport.initCrashReport(getApplicationContext(), "", false);
		GroupUitls.init(instance);
		getCrashHandler(applicationContext);
	}
	public static CrashHandler getCrashHandler(Context context) {
		CrashHandler crashHandler = CrashHandler.getInstance();
		crashHandler.init(context);
		return crashHandler;
	}
	public static DemoApplication getInstance() {
		return instance;
	}

	@Override
	protected void attachBaseContext(Context base) {
		super.attachBaseContext(base);
		MultiDex.install(this);
	}

	public  void setUserJson( JSONObject userJson){

		this.userJson=userJson;
		LocalDataUtils.getInstance().setUserJson(userJson);

	}
	public JSONObject getUserJson(){
		if(userJson==null){
			userJson= LocalDataUtils.getInstance().getUserJson();
		}
		return  userJson;
	}
	public String getTime(){
		return time;

	}
	public void setTime(String time){
		this.time=time;
	}
	/**
	 * 获取置顶列表
	 */
	public Map<String, TopUser> getTopUserList() {
		if(topUsers==null){
			TopUserDao dao = new TopUserDao(instance);
			topUsers=dao.getTopUserList();
		}
		return topUsers;
	}
	/*
	* 设置置顶列表
	* */
	public void saveTopUserList( Map<String, TopUser> topUsers) {
		this.topUsers=topUsers;
 		TopUserDao dao = new TopUserDao(instance);
		dao.saveTopUserList(new ArrayList<TopUser>(topUsers.values()));
	}


	public static int getRandomStreamId() {
		Random random = new Random();
		int randint =(int)Math.floor((random.nextDouble()*10000.0 + 10000.0));
		return randint;
	}

	public float getScreenDensity() {
		if (this.displayMetrics == null) {
			setDisplayMetrics(getResources().getDisplayMetrics());
		}
		return this.displayMetrics.density;
	}

	public int getScreenHeight() {
		if (this.displayMetrics == null) {
			setDisplayMetrics(getResources().getDisplayMetrics());
		}
		return this.displayMetrics.heightPixels;
	}

	public int getScreenWidth() {
		if (this.displayMetrics == null) {
			setDisplayMetrics(getResources().getDisplayMetrics());
		}
		return this.displayMetrics.widthPixels;
	}

	public void setDisplayMetrics(DisplayMetrics DisplayMetrics) {
		this.displayMetrics = DisplayMetrics;
	}

	public int dp2px(float f)
	{
		return (int)(0.5F + f * getScreenDensity());
	}

	public int px2dp(float pxValue) {
		return (int) (pxValue / getScreenDensity() + 0.5f);
	}

	//获取应用的data/data/....File目录
	public String getFilesDirPath() {
		return getFilesDir().getAbsolutePath();
	}

	//获取应用的data/data/....Cache目录
	public String getCacheDirPath() {
		return getCacheDir().getAbsolutePath();
	}

	public  void saveActivity(Activity activity){
		if(activity!=null){
			activities.add(activity);
		}

	}

	public  void finishActivities(){
		for(Activity activity:activities){
			if(activity!=null&&!activity.isFinishing()){
				activity.finish();
			}
		}

	}

}