InformationKanban/app/src/main/java/com/example/informationkanban/MainActivity.java

package com.example.informationkanban;

import androidx.appcompat.app.AppCompatActivity;

import android.os.Bundle;
import android.os.Handler;
import android.os.Looper;
import android.text.TextUtils;
import android.util.Log;
import android.view.KeyEvent;
import android.view.View;
import android.view.ViewGroup;
import android.view.Window;
import android.view.WindowManager;
import android.webkit.WebChromeClient;
import android.webkit.WebSettings;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import android.widget.LinearLayout;
import android.widget.TextView;
import android.widget.Toast;

import com.example.informationkanban.dialog.UrlConfigDialogHelper;
import com.example.informationkanban.utils.AppUtil;
import com.example.informationkanban.utils.GetInformationUtils;
import com.example.informationkanban.utils.LocaleMangerUtils;
import com.example.informationkanban.utils.NetFunctionConfig;
import com.example.informationkanban.view.SplashView;

import java.util.Random;

public class MainActivity extends AppCompatActivity {
    private String TAG = MainActivity.class.getSimpleName();
    private WebView webView;
    private String MAC = "";
    private LinearLayout initView;
    private SplashView splashView;

    private long backClickTime = 0;

    private final Handler handler = new Handler(Looper.getMainLooper());

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        int languageId = NetFunctionConfig.getLanguageId(this);
        LocaleMangerUtils.setApplicationLanguageByIndex(this, languageId);

        super.onCreate(savedInstanceState);

        requestWindowFeature(Window.FEATURE_NO_TITLE);
        getWindow().addFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN |
                WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON |
                WindowManager.LayoutParams.FLAG_SHOW_WHEN_LOCKED |
                WindowManager.LayoutParams.FLAG_TURN_SCREEN_ON);

        setContentView(R.layout.activity_main);
        init();

        MAC = GetInformationUtils.getIMEI(this);

        //如果获取id为空则随机生成
        if (TextUtils.isEmpty(MAC)) {
            if (TextUtils.isEmpty(NetFunctionConfig.getUUID())) {
                MAC = "8" + new Random().nextInt(10) + System.currentTimeMillis();
                NetFunctionConfig.setUUID(MAC);
            } else {
                MAC = NetFunctionConfig.getUUID();
            }
        }

        String url = NetFunctionConfig.getCBDUrl();
        if (BuildConfig.type.equalsIgnoreCase("s64_ldjc")) {
            url = NetFunctionConfig.getCBDS64Url();
        } else if (BuildConfig.type.equalsIgnoreCase("s65_shzy")) {
            url = NetFunctionConfig.getWdklS65Url();
        } else if (BuildConfig.type.equalsIgnoreCase("s64_wxh")) {
            url = NetFunctionConfig.getWxhUrl();
        }

        if (TextUtils.isEmpty(url)) {
            //url为空则需要手动配置
            UrlConfigDialogHelper.showDialog(MainActivity.this);
        } else {
            if (AppUtil.isNetConnection(MainActivity.this)) {
                accessTheWebpage();
            } else {
                initView.setVisibility(View.VISIBLE);

                //检测网络连接
                handler.postDelayed(this::checkNetwork, 10000);
            }
        }
    }

    private void checkNetwork() {
        Log.e(TAG, "start check network...");
        if (AppUtil.isNetConnection(MainActivity.this)) {
            accessTheWebpage();
        } else {
            handler.postDelayed(this::checkNetwork, 10000);
        }
    }

    @Override
    protected void onResume() {
        super.onResume();
        View decorView = getWindow().getDecorView();
        decorView.setSystemUiVisibility(View.SYSTEM_UI_FLAG_LAYOUT_STABLE
                | View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION
                | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
                | View.SYSTEM_UI_FLAG_HIDE_NAVIGATION
                | View.SYSTEM_UI_FLAG_FULLSCREEN
                | View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY);
    }

    private void init() {
        //获得控件
        webView = findViewById(R.id.wv_webview);
        initView = findViewById(R.id.ll_splash);
        splashView = findViewById(R.id.splash_view);
    }

    private void accessTheWebpage() {
        handler.removeCallbacksAndMessages(null);

        Log.e(TAG, "access web page...");

        webView.setInitialScale(100);//设置缩放比例
        WebSettings settings = webView.getSettings();
        settings.setJavaScriptCanOpenWindowsAutomatically(true);//设置js可以直接打开窗口，如window.open()，默认为false
        settings.setJavaScriptEnabled(true);//是否允许执行js，默认为false。设置true时，会提醒可能造成XSS漏洞
        settings.setSupportZoom(true);//是否可以缩放，默认true
        settings.setBuiltInZoomControls(false);//是否显示缩放按钮，默认false
        settings.setUseWideViewPort(true);//设置此属性，可任意比例缩放。大视图模式
        settings.setLoadWithOverviewMode(true);//和setUseWideViewPort(true)一起解决网页自适应问题
        settings.setAppCacheEnabled(false);//是否使用缓存
        settings.setCacheMode(WebSettings.LOAD_NO_CACHE);
        settings.setDomStorageEnabled(true);//DOM Storage
        settings.setMediaPlaybackRequiresUserGesture(false);

        //String myUrl = "192.168.1.196:8080";
        //String myUrl = NetFunctionConfig.getCBDUrl();
        String myUrl;

        //例如：http://cbd.wdklian.com?token=123456
        if (BuildConfig.type.equalsIgnoreCase("s65_shzy")) {
            myUrl = NetFunctionConfig.getWdklS65Url();
        } else if (BuildConfig.type.equalsIgnoreCase("s64_ldjc")) {
            myUrl = NetFunctionConfig.getCBDS64Url() + MAC;
        } else if (BuildConfig.type.equalsIgnoreCase("s64_wxh")) {
            myUrl = NetFunctionConfig.getWxhUrl();
        } else {
            //都要带token
            myUrl = NetFunctionConfig.getCBDUrl() + MAC;
        }

        //Toast.makeText(MainActivity.this, "fetch: " + myUrl, Toast.LENGTH_LONG).show();
        Toast.makeText(MainActivity.this, "正在加载数据，请稍后...", Toast.LENGTH_LONG).show();
        splashView.finshSplash();
        initView.setVisibility(View.GONE);
        Log.e(TAG, "load url: " + myUrl);

        webView.loadUrl(myUrl);
        //系统默认会通过手机浏览器打开网页，为了能够直接通过WebView显示网页，则必须设置
        webView.setWebViewClient(new WebViewClient() {
            @Override
            public boolean shouldOverrideUrlLoading(WebView view, String url) {
                //使用WebView加载显示url
                view.loadUrl(url);
                //返回true
                return true;
            }

            /*@Override
            public boolean shouldOverrideKeyEvent(WebView view, KeyEvent event) {
                return true;
                //return super.shouldOverrideKeyEvent(view, event);
            }*/
        });

        webView.setWebChromeClient(new WebChromeClient() {
            @Override
            public void onProgressChanged(WebView view, int newProgress) { //显示加载进度

                Log.d(TAG, "load webview..." + newProgress + "%");
            }
        });
    }

    @Override
    public boolean onKeyDown(int keyCode, KeyEvent event) {
        if (keyCode == KeyEvent.KEYCODE_BACK) {
            if (webView != null && webView.canGoBack()) {
                webView.goBack();
                return true;
            }

            long currentTime = System.currentTimeMillis();
            // 3秒内连按两次后退按钮，退出应用
            if (currentTime - backClickTime < 3000) {
                finish();
            } else {
                Toast.makeText(getApplicationContext(), "再按一次返回键退出", Toast.LENGTH_SHORT).show();
                backClickTime = currentTime;
            }

            return true;
        }

        return super.onKeyDown(keyCode, event);
    }

    //销毁Webview
    @Override
    protected void onDestroy() {
        handler.removeCallbacksAndMessages(null);

        if (webView != null) {
            //webView.loadDataWithBaseURL(null, "", "text/html", "utf-8", null);
            //webView.clearHistory();

            ((ViewGroup) webView.getParent()).removeView(webView);
            webView.destroy();
            webView = null;
        }

        super.onDestroy();
    }

}