mimouchat-android/app/src/main/java/com/knacki/mimou/activity/MainActivity.java

package com.knacki.mimou.activity;

import android.content.Intent;
import android.net.Uri;
import android.os.Build;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.webkit.WebChromeClient;
import android.webkit.WebView;
import android.webkit.WebViewClient;

import com.knacki.mimou.BuildConfig;
import com.knacki.mimou.api.CredentialHolder;
import com.knacki.mimou.JsInterface;
import com.knacki.mimou.R;

import java.util.logging.Logger;

public class MainActivity extends AppCompatActivity {
    protected WebView web;
    protected JsInterface interfaceMimouDroid;
    private static Logger log = Logger.getLogger(MainActivity.class.getName());

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        interfaceMimouDroid = new JsInterface();
        web = (WebView) findViewById(R.id.webview);
        web.setWebChromeClient(new WebChromeClient());
        web.setWebViewClient(new WebViewClient() {
            @Override
            public boolean shouldOverrideUrlLoading(WebView view, String url) {
                Uri uri = Uri.parse(url);

                log.fine("Loading url " +url);
                if (uri.getHost().equals(getString(R.string.mimouHost))) {
                    if (uri.getPathSegments().get(0).equals("login")) {
                        CredentialHolder.removeToken(MainActivity.this);
                        showLogin();
                        return true;
                    }
                    return super.shouldOverrideUrlLoading(view, url);
                }
                startActivity(new Intent(Intent.ACTION_VIEW, Uri.parse(url)));
                return true;
            }
        });

        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
            web.setWebContentsDebuggingEnabled(BuildConfig.DEBUG);
        }

        web.getSettings().setJavaScriptEnabled(true);
        web.addJavascriptInterface(interfaceMimouDroid, "__native");
        web.loadUrl(CredentialHolder.isLocal(this) ? (getString(R.string.mimouUrl) + (getString(R.string.localUrl))) : getString(R.string.mimouUrl));
    }

    protected void showLogin() {
        startActivity(new Intent(MainActivity.this, LoginActivity.class));
    }

    @Override
    protected void onResume() {
        super.onResume();
        if (!CredentialHolder.hasCredential(this)) {
            showLogin();
        }
        interfaceMimouDroid.setActivity(this);
    }

    @Override
    public void onBackPressed() {
        moveTaskToBack(true);
    }
}