Как сделать плавающую нижнюю навигационную панель в android веб-представлении, которая изначально скрыта и видна после изменения URL? - PullRequest
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Как сделать плавающую нижнюю навигационную панель в android веб-представлении, которая изначально скрыта и видна после изменения URL?

0 голосов
/ 17 марта 2020

Я пытаюсь преобразовать свой отзывчивый веб-сайт в android. Я могу успешно преобразовать его в приложение. Но теперь я сталкиваюсь с проблемой ниже при добавлении нижней панели навигации.

проблема 1: навигация снизу создана в коде, но не отображается приложение.

Невозможно скрыть навигацию снизу для указанного c URL. Например, если я открою начальную страницу «https://google.com», она должна скрыться, иначе должна быть видна панель навигации. Как и на моем веб-сайте html кнопка «погружение внутрь», если я нажму на кнопку погружения внутри, то должна появиться кнопка навигации. 1

Можете ли вы помочь в достижении этого?

MainActivity. java

package com.developer.basantneupane387.moonmoon;
import androidx.annotation.NonNull;
import androidx.appcompat.app.AlertDialog;
import androidx.appcompat.app.AppCompatActivity;
import androidx.swiperefreshlayout.widget.SwipeRefreshLayout;
import android.Manifest;
import android.app.DownloadManager;
import android.app.ProgressDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.graphics.Color;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.net.Uri;
import android.os.Bundle;
import android.os.Environment;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewTreeObserver;
import android.view.Window;
import android.view.WindowManager;
import android.webkit.CookieManager;
import android.webkit.DownloadListener;
import android.webkit.PermissionRequest;
import android.webkit.URLUtil;
import android.webkit.WebChromeClient;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import android.widget.Button;
import android.widget.ProgressBar;
import android.widget.RelativeLayout;
import android.widget.Toast;

import com.google.android.material.bottomnavigation.BottomNavigationView;
import com.karumi.dexter.Dexter;
import com.karumi.dexter.PermissionToken;
import com.karumi.dexter.listener.PermissionDeniedResponse;
import com.karumi.dexter.listener.PermissionGrantedResponse;
import com.karumi.dexter.listener.single.PermissionListener;

public class MainActivity extends AppCompatActivity {
    WebView webView;
    private String webUrl = "http://github.com";
    ProgressBar progressBarWeb;
    ProgressDialog progressDialog;
    RelativeLayout relativeLayout;
    Button btnNoInternetConnection;
    SwipeRefreshLayout swipeRefreshLayout;
    BottomNavigationView bottomNavigationView;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        webView = (WebView) findViewById(R.id.myWebView);
        progressBarWeb = (ProgressBar) findViewById(R.id.progressBar);
        progressDialog = new ProgressDialog(this);
        progressDialog.setMessage("Loading Please Wait");
        bottomNavigationView = (BottomNavigationView) findViewById(R.id.bottom_navigation);
        btnNoInternetConnection = (Button) findViewById(R.id.btnNoConnection);
        relativeLayout = (RelativeLayout) findViewById(R.id.relativeLayout);
        swipeRefreshLayout = (SwipeRefreshLayout) findViewById(R.id.swipeRefreshLayout);
        swipeRefreshLayout.setColorSchemeColors(Color.BLUE,Color.YELLOW,Color.GREEN);
        swipeRefreshLayout.setOnRefreshListener(new SwipeRefreshLayout.OnRefreshListener() {
            @Override
            public void onRefresh() {
                webView.reload();
            }
        });
        if(savedInstanceState !=null) {
            webView.restoreState(savedInstanceState);
        }
        else {
            webView.getSettings().setJavaScriptEnabled(true);
            webView.getSettings().setLoadWithOverviewMode(true);
            webView.getSettings().setUseWideViewPort(true);
            webView.getSettings().setDomStorageEnabled(true);
            webView.getSettings().setLoadsImagesAutomatically(true);
            checkConnection();
        }
        bottomNavigationView.setOnNavigationItemSelectedListener(new BottomNavigationView.OnNavigationItemSelectedListener() {
            @Override
            public boolean onNavigationItemSelected(@NonNull MenuItem item) {
                switch(item.getItemId()){
                    case R.id.nav_previous:
                        Toast.makeText(MainActivity.this, "Previous", Toast.LENGTH_SHORT).show();
                        onBackPressed();
                        break;
                    case R.id.nav_next:
                        Toast.makeText(MainActivity.this, "Forward", Toast.LENGTH_SHORT).show();
                        if (webView.canGoForward()) {
                            webView.goForward();
                        }
                        break;
                    case R.id.nav_reload:
                        Toast.makeText(MainActivity.this, "Reload", Toast.LENGTH_SHORT).show();
                        checkConnection();
                        break;
                }
                return true;
            }
        });

        //Solved WebView SwipeUp Problem
        webView.getViewTreeObserver().addOnScrollChangedListener(new ViewTreeObserver.OnScrollChangedListener() {
            @Override
            public void onScrollChanged() {
                if (webView.getScrollY() == 0) {
                    swipeRefreshLayout.setEnabled(true);
                } else {
                    swipeRefreshLayout.setEnabled(false);
                }
            }
        });
        webView.setDownloadListener(new DownloadListener() {
            @Override
            public void onDownloadStart(final String s, final String s1, final String s2, final String s3, long l) {
                Dexter.withActivity(MainActivity.this)
                      .withPermission(Manifest.permission.WRITE_EXTERNAL_STORAGE)
                      .withListener(new PermissionListener() {
                            @Override
                            public void onPermissionGranted(PermissionGrantedResponse response) {
                                DownloadManager.Request request = new DownloadManager.Request(Uri.parse(s));
                                request.setMimeType(s3);
                                String cookies = CookieManager.getInstance().getCookie(s);
                                request.addRequestHeader("cookie", cookies);
                                request.addRequestHeader("User-Agent", s1);
                                request.setDescription("Downloading File.....");
                              request.setTitle(URLUtil.guessFileName(s,s2,s3));
                                request.allowScanningByMediaScanner();
                                request.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED);
                                request.setDestinationInExternalPublicDir(
                                        Environment.DIRECTORY_DOWNLOADS, URLUtil.guessFileName(
                                                s,s2,s3));
                                DownloadManager downloadManager = (DownloadManager) getSystemService(DOWNLOAD_SERVICE);
                                downloadManager.enqueue(request);
                                Toast.makeText(MainActivity.this, "Downloading File..", Toast.LENGTH_SHORT).show();
                            }

                            @Override
                            public void onPermissionDenied(PermissionDeniedResponse response) {
                            }

                            @Override
                            public void onPermissionRationaleShouldBeShown(com.karumi.dexter.listener.PermissionRequest permission, PermissionToken token) {
                                token.continuePermissionRequest();
                            }
                        }).check();
            }
        });
        webView.setWebViewClient(new WebViewClient(){
            @Override
            public void onPageFinished(WebView view, String url) {
                swipeRefreshLayout.setRefreshing(false);
                super.onPageFinished(view, url);
            }

            @Override
            public boolean shouldOverrideUrlLoading(WebView view, String url) {
                view.loadUrl(url);
                return true;
            }
        });
        webView.setWebChromeClient(new WebChromeClient(){
            @Override
            public void onProgressChanged(WebView view, int newProgress) {
                progressBarWeb.setVisibility(View.VISIBLE);
                progressBarWeb.setProgress(newProgress);
                setTitle("Loading...");
                progressDialog.show();
                if (newProgress ==100){
                    progressBarWeb.setVisibility(View.GONE);
                    setTitle(view.getTitle());
                    progressDialog.dismiss();
                }
                super.onProgressChanged(view, newProgress);
            }
        });
        btnNoInternetConnection.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                checkConnection();
            }
        });
    }

    @Override
    public void onBackPressed() {
        if(webView.canGoBack()) {
            webView.goBack();
        }
        else {  
            AlertDialog.Builder builder = new AlertDialog.Builder(this);
            builder.setMessage("Are you sure you want to Exit Moon-Moon?")
                    .setNegativeButton("No",null)
                    .setPositiveButton("Yes", new DialogInterface.OnClickListener() {
                        @Override
                        public void onClick(DialogInterface dialogInterface, int i) {
                            finishAffinity();
                        }
                    }).show();
        }
    }

    public void checkConnection(){
        ConnectivityManager connectivityManager = (ConnectivityManager)
                this.getSystemService(Context.CONNECTIVITY_SERVICE);
        NetworkInfo wifi = connectivityManager.getNetworkInfo(ConnectivityManager.TYPE_WIFI);
        NetworkInfo mobileNetwork = connectivityManager.getNetworkInfo(ConnectivityManager.TYPE_MOBILE);
        if (wifi.isConnected()) {
            webView.loadUrl(webUrl);
            webView.setVisibility(View.VISIBLE);
            relativeLayout.setVisibility(View.GONE);
        }
        else if (mobileNetwork.isConnected()){
            webView.loadUrl(webUrl);
            webView.setVisibility(View.VISIBLE);
            relativeLayout.setVisibility(View.GONE);
        }
        else {
            webView.setVisibility(View.GONE);
            relativeLayout.setVisibility(View.VISIBLE);
        }
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.toolbar_menu,menu);
        return super.onCreateOptionsMenu(menu);
    }

    @Override
    protected void onSaveInstanceState(Bundle outState) {
        super.onSaveInstanceState(outState);
        webView.saveState(outState);
    }
}

activity_main. xml: 

<?xml version="1.0" encoding="utf-8"?>
<androidx.swiperefreshlayout.widget.SwipeRefreshLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:id="@+id/swipeRefreshLayout"
    tools:context=".MainActivity">
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical">
        <ProgressBar
            android:layout_width="match_parent"
            android:layout_height="6dp"
            android:id="@+id/progressBar"
            style="?android:attr/progressBarStyleHorizontal"
            android:layout_marginTop="-2dp"
            android:progress="20"
            android:visibility="gone"/>
        <WebView
            android:id="@+id/myWebView"
            android:layout_width="match_parent"
            android:layout_height="676dp"/>
        <RelativeLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:background="#ffffff"
            android:id="@+id/relativeLayout">
            <com.google.android.material.bottomnavigation.BottomNavigationView
                android:id="@+id/bottom_navigation"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_alignParentBottom="true"
                app:menu="@menu/bottom_nav_menu"
                app:itemBackground="@color/colorPrimary"
                app:itemIconTint="@android:color/white"
                app:itemTextColor="@android:color/white" />
            <ImageView
                android:layout_width="240dp"
                android:layout_height="220dp"
                android:src="@drawable/no_internet"
                android:layout_centerHorizontal="true"
                android:id="@+id/noConnectionLogo"/>
            <TextView
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:text="No Internet Connection"
                android:layout_below="@+id/noConnectionLogo"
                android:textAlignment="center"
                android:textSize="26sp"
                android:id="@+id/txtNoConnection"/>
            <Button
                android:layout_width="140dp"
                android:layout_height="55dp"
                android:text="Retry"
                android:background="@color/colorAccent"
                android:textColor="#ffffff"
                android:textSize="22sp"
                android:layout_below="@id/txtNoConnection"
                android:layout_centerHorizontal="true"
                android:layout_marginTop="60dp"
                android:id="@+id/btnNoConnection"/>
        </RelativeLayout>
    </LinearLayout>
</androidx.swiperefreshlayout.widget.SwipeRefreshLayout>

bottom_nav_menu. xml

<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto">
    <item
        android:title="previous"
        android:id="@+id/nav_previous"
        app:showAsAction="always"
        android:icon="@drawable/ic_navigate_before_black_24dp"/>
    <item
        android:title="previous"
        android:id="@+id/nav_next"
        app:showAsAction="always"
        android:icon="@drawable/ic_navigate_next_black_24dp"/>
    <item
        android:title="previous"
        android:id="@+id/nav_reload"
        app:showAsAction="always"
        android:icon="@drawable/ic_refresh_black_24dp"/>
</menu>

AndroidMenifest . xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.developer.basantneupane387.moonmoon" >

    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
    <uses-permission android:name="android.permission.INTERNET" />
    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />

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

Если нужен какой-либо другой код, я могу это предоставить.

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