Question

我只是想使用WebView为网站wikidiy.org构建我的第一个应用程序。我已经尝试了很多在这里找到的方法，但是该应用程序仍然非常落后。有什么办法可以使这个应用程序没有落后？当我在Chrome浏览器中打开网站时，它可以流畅且正确运行，但是在WebView应用程序中几乎无法使用。

编辑：使用网络视图是否有意义？或者我应该学习如何使用WP RestAPI作为本机应用程序？

这是我的代码：

清单

<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="org.wikidiy.wikidiy">
    <uses-permission android:name="android.permission.INTERNET" />
    <uses-permission android:name="android.permission.CAMERA" />
    <uses-permission android:name="android.webkit.PermissionRequest" />
    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>

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

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

</manifest>

Java

package org.wikidiy.wikidiy;

import android.app.Activity;
import android.content.Intent;
import android.content.res.Configuration;
import android.net.Uri;
import android.os.Handler;
import android.support.v4.widget.SwipeRefreshLayout;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.KeyEvent;
import android.webkit.ValueCallback;
import android.webkit.WebChromeClient;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import android.graphics.Bitmap;
import android.view.View;
import android.widget.ProgressBar;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity {

    String ShowOrHideWebViewInitialUse = "show";
    private WebView webview ;
    private ProgressBar spinner;
    SwipeRefreshLayout mySwipeRefreshLayout;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        setTheme(R.style.AppTheme);
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        mySwipeRefreshLayout = (SwipeRefreshLayout)this.findViewById(R.id.swipeContainer);
        webview =(WebView)findViewById(R.id.webView);
        spinner = (ProgressBar)findViewById(R.id.progressBar1);
        webview.setWebViewClient(new CustomWebViewClient());
        webview.getSettings().setJavaScriptEnabled(true);
        webview.getSettings().setDomStorageEnabled(true);
        webview.setOverScrollMode(WebView.OVER_SCROLL_NEVER);
        webview.loadUrl("https://wikidiy.org");


        mySwipeRefreshLayout.setOnRefreshListener(
                new SwipeRefreshLayout.OnRefreshListener() {
                    @Override
                    public void onRefresh() {
                        webview.reload();
                    }
                }
        );
    }

    // This allows for a splash screen
    // (and hide elements once the page loads)
    private class CustomWebViewClient extends WebViewClient {

        @Override
        public void onPageStarted(WebView webview, String url, Bitmap favicon) {

            // only make it invisible the FIRST time the app is run
            if (ShowOrHideWebViewInitialUse.equals("show")) {
                webview.setVisibility(webview.INVISIBLE);
            }
        }

        @Override
        public void onPageFinished(WebView view, String url) {

            ShowOrHideWebViewInitialUse = "hide";
            spinner.setVisibility(View.GONE);

            view.setVisibility(webview.VISIBLE);
            super.onPageFinished(view, url);

        }
    }

    @Override
    public boolean onKeyDown(int keyCode, KeyEvent event) {
        if (event.getAction() == KeyEvent.ACTION_DOWN) {
            switch (keyCode) {
                case KeyEvent.KEYCODE_BACK:
                    if (webview.canGoBack()) {
                        webview.goBack();
                    } else {
                        finish();
                    }
                    return true;
            }

        }
        return super.onKeyDown(keyCode, event);
    }
}

activity_main

<RelativeLayout 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="match_parent"
    tools:context=".MainActivity"
    tools:layout_editor_absoluteY="25dp">

    <android.support.v4.widget.SwipeRefreshLayout
        android:id="@+id/swipeContainer"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        app:layout_behavior="@string/app_name">


    <WebView
        android:id="@+id/webView"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_alignParentStart="true"
        android:layout_alignParentTop="true"
        android:accessibilityHeading="false"
        tools:layout_editor_absoluteX="45dp"
        tools:layout_editor_absoluteY="56dp">

    </WebView>
    <ProgressBar
        android:id="@+id/progressBar1"
        style="?android:attr/progressBarStyle"
        android:layout_width="100dp"
        android:layout_height="100dp"
        android:layout_alignParentBottom="true"
        android:layout_centerHorizontal="true"
        android:layout_marginBottom="144dp"
        android:visibility="visible"
        android:layout_gravity="center"
        tools:layout_editor_absoluteX="168dp"
        tools:layout_editor_absoluteY="347dp"
        tools:visibility="visible" />

    </android.support.v4.widget.SwipeRefreshLayout>
</RelativeLayout>

样式

<resources>
    <style name="splashScreenTheme" parent="@android:style/Theme.DeviceDefault.Light.NoActionBar">
        <item name="android:windowBackground">@drawable/splash_screen</item>
    </style>
    <!-- Base application theme. -->
    <style name="AppTheme" parent="Theme.AppCompat.Light.NoActionBar">
        <!-- Customize your theme here. -->
        <item name="android:windowBackground">@drawable/splash_screen</item>
        <item name="colorPrimary">@color/colorPrimary</item>
        <item name="colorPrimaryDark">@color/colorPrimaryDark</item>
        <item name="colorAccent">@color/colorAccent</item>
    </style>

</resources>

Answer 1

我使用以下代码创建任何WebView apk。它工作正常，没有任何滞后，请尝试一下。

这将是基本代码，然后您可以在此代码中添加swipeToRefresh和Loader。

MainActivity.java：-

g['Category'] = ""

for i in g['NumFloorsGroup']:
    if i == '0-9' or i == '10-19':
        g['Category'] = 'LowFl'
    elif i == '50~':
        g['Category'] = 'HighFl'
    else:
        g['Category'] = 'NormalFl'

activity_main.xml：-

    YearBuilt   NumFloorsGroup  Count   Category
128 1920    0-9 90956   LowFl
171 1930    0-9 76659   LowFl
144 1925    0-9 70387   LowFl
237 1950    0-9 47237   LowFl
91  1910    0-9 46384   LowFl

如何使用WebView制作无延迟的android应用？

1 个答案: