仅调用活动的一部分（Android studio、java）

我正在编写一个包含两个活动的简单代码。第二个是一个简单的web视图浏览器，它覆盖默认浏览器

主活动中的按钮调用第二个

活动加载（加载文本编辑和按钮，但不加载web视图）

如果您单击加载的按钮，出于某种原因，它将返回主界面

错误日志似乎表明它无法绘制webview，而是默认为默认背景色。然而，我不知道如何补救，也不知道是什么原因造成的。奇怪的是，它加载了一个按钮和文本编辑，但是

Log.d（“标记名”，“正在运行的浏览器类”）我输入的不是打印。我将为这两个活动提供清单、错误日志和代码。布局文件应该是不需要的，因为它们都相当简单，但是如果您喜欢，请告诉我（如果可能的话，请尽量缩短长度）。您会注意到第三个活动，但它没有实现代码或引用，还没有实现。谢谢

舱单：

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="comi.coding.prometheus.ignisai" >

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

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

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

        </activity>
        <activity android:name=".Browser"/>
        <activity android:name=".ConnectorActivity"/>
    </application>

</manifest>

浏览器（第二项活动）：

错误：

11-14 00:52:21.077 8568-8568/? D/dalvikvm: Late-enabling CheckJNI
11-14 00:52:21.287 8568-8568/comi.coding.prometheus.ignisai W/dalvikvm: VFY: unable to find class referenced in signature (Landroid/view/SearchEvent;)
11-14 00:52:21.287 8568-8568/comi.coding.prometheus.ignisai I/dalvikvm: Could not find method android.view.Window$Callback.onSearchRequested, referenced from method android.support.v7.internal.view.WindowCallbackWrapper.onSearchRequested
11-14 00:52:21.287 8568-8568/comi.coding.prometheus.ignisai W/dalvikvm: VFY: unable to resolve interface method 17897: Landroid/view/Window$Callback;.onSearchRequested (Landroid/view/SearchEvent;)Z
11-14 00:52:21.287 8568-8568/comi.coding.prometheus.ignisai D/dalvikvm: VFY: replacing opcode 0x72 at 0x0002
11-14 00:52:21.287 8568-8568/comi.coding.prometheus.ignisai I/dalvikvm: Could not find method android.view.Window$Callback.onWindowStartingActionMode, referenced from method android.support.v7.internal.view.WindowCallbackWrapper.onWindowStartingActionMode
11-14 00:52:21.287 8568-8568/comi.coding.prometheus.ignisai W/dalvikvm: VFY: unable to resolve interface method 17901: Landroid/view/Window$Callback;.onWindowStartingActionMode (Landroid/view/ActionMode$Callback;I)Landroid/view/ActionMode;
11-14 00:52:21.287 8568-8568/comi.coding.prometheus.ignisai D/dalvikvm: VFY: replacing opcode 0x72 at 0x0002
11-14 00:52:21.297 8568-8568/comi.coding.prometheus.ignisai I/dalvikvm: Could not find method android.content.res.TypedArray.getChangingConfigurations, referenced from method android.support.v7.internal.widget.TintTypedArray.getChangingConfigurations
11-14 00:52:21.297 8568-8568/comi.coding.prometheus.ignisai W/dalvikvm: VFY: unable to resolve virtual method 422: Landroid/content/res/TypedArray;.getChangingConfigurations ()I
11-14 00:52:21.297 8568-8568/comi.coding.prometheus.ignisai D/dalvikvm: VFY: replacing opcode 0x6e at 0x0002
11-14 00:52:21.297 8568-8568/comi.coding.prometheus.ignisai I/dalvikvm: Could not find method android.content.res.TypedArray.getType, referenced from method android.support.v7.internal.widget.TintTypedArray.getType
11-14 00:52:21.297 8568-8568/comi.coding.prometheus.ignisai W/dalvikvm: VFY: unable to resolve virtual method 444: Landroid/content/res/TypedArray;.getType (I)I
11-14 00:52:21.297 8568-8568/comi.coding.prometheus.ignisai D/dalvikvm: VFY: replacing opcode 0x6e at 0x0002
11-14 00:52:21.367 8568-8568/comi.coding.prometheus.ignisai I/dalvikvm: Could not find method android.content.res.Resources.getDrawable, referenced from method android.support.v7.internal.widget.ResourcesWrapper.getDrawable
11-14 00:52:21.367 8568-8568/comi.coding.prometheus.ignisai W/dalvikvm: VFY: unable to resolve virtual method 385: Landroid/content/res/Resources;.getDrawable (ILandroid/content/res/Resources$Theme;)Landroid/graphics/drawable/Drawable;
11-14 00:52:21.367 8568-8568/comi.coding.prometheus.ignisai D/dalvikvm: VFY: replacing opcode 0x6e at 0x0002
11-14 00:52:21.367 8568-8568/comi.coding.prometheus.ignisai I/dalvikvm: Could not find method android.content.res.Resources.getDrawableForDensity, referenced from method android.support.v7.internal.widget.ResourcesWrapper.getDrawableForDensity
11-14 00:52:21.367 8568-8568/comi.coding.prometheus.ignisai W/dalvikvm: VFY: unable to resolve virtual method 387: Landroid/content/res/Resources;.getDrawableForDensity (IILandroid/content/res/Resources$Theme;)Landroid/graphics/drawable/Drawable;
11-14 00:52:21.367 8568-8568/comi.coding.prometheus.ignisai D/dalvikvm: VFY: replacing opcode 0x6e at 0x0002
11-14 00:52:21.877 8568-8568/comi.coding.prometheus.ignisai I/PGA: Attempting to create new SOCKET connectionn pid = 8568, tid = 8568
11-14 00:52:21.987 8568-8568/comi.coding.prometheus.ignisai I/PGA: New SOCKET connection: comi.coding.prometheus.ignisai (pid 8568, tid 8568)
11-14 00:52:21.987 8568-8568/comi.coding.prometheus.ignisai W/PGA: [8568] egl: eglCreateWindowSurface (0x557607a0, 0x0, 0x78c66f48, 0x7751f0e0)
11-14 00:52:22.057 8568-8568/comi.coding.prometheus.ignisai W/PGA: [8568] egl: eglCreateWindowSurface (0x557607a0, 0x0, 0x78c66f48, 0x7751f0e0) returned
11-14 00:52:22.077 8568-8568/comi.coding.prometheus.ignisai D/OpenGLRenderer: Enabling debug mode 0
11-14 00:52:33.357 8568-8568/comi.coding.prometheus.ignisai V/WebViewChromium: Binding Chromium to the background looper Looper (main, tid 1) {327731e8}
11-14 00:52:33.357 8568-8568/comi.coding.prometheus.ignisai I/chromium: [INFO:library_loader_hooks.cc(112)] Chromium logging enabled: level = 0, default verbosity = 0
11-14 00:52:33.357 8568-8568/comi.coding.prometheus.ignisai I/BrowserProcessMain: Initializing chromium process, renderers=0
11-14 00:52:33.357 8568-9189/comi.coding.prometheus.ignisai W/chromium: [WARNING:proxy_service.cc(888)] PAC support disabled because there is no system implementation
11-14 00:52:33.367 8568-8568/comi.coding.prometheus.ignisai W/PGA: [8568] egl: eglDestroySurface (0x557607a0, 0x78cdb1e0)
11-14 00:52:33.367 8568-8568/comi.coding.prometheus.ignisai W/PGA: [8568] egl: eglDestroySurface (0x557607a0, 0x78cdb1e0) returned
11-14 00:52:33.927 8568-8568/comi.coding.prometheus.ignisai D/dalvikvm: GC_FOR_ALLOC freed 279K, 21% free 2966K/3736K, paused 30ms, total 30ms
11-14 00:52:34.217 8568-8568/comi.coding.prometheus.ignisai W/PGA: [8568] egl: eglCreateWindowSurface (0x557607a0, 0x0, 0x78c8c948, 0x7751f0e0)
11-14 00:52:34.217 8568-8568/comi.coding.prometheus.ignisai W/PGA: [8568] egl: eglCreateWindowSurface (0x557607a0, 0x0, 0x78c8c948, 0x7751f0e0) returned
11-14 00:52:34.217 8568-8568/comi.coding.prometheus.ignisai W/AwContents: nativeOnDraw failed; clearing to background color.
11-14 00:52:34.257 8568-8568/comi.coding.prometheus.ignisai W/AwContents: nativeOnDraw failed; clearing to background color.
11-14 00:52:34.287 8568-8568/comi.coding.prometheus.ignisai W/PGA: [8568] egl: eglDestroySurface (0x557607a0, 0x78c68c80)
11-14 00:52:34.287 8568-8568/comi.coding.prometheus.ignisai W/PGA: [8568] egl: eglDestroySurface (0x557607a0, 0x78c68c80) returned
11-14 00:52:35.187 8568-8568/comi.coding.prometheus.ignisai W/AwContents: nativeOnDraw failed; clearing to background color.
11-14 00:52:35.197 8568-8568/comi.coding.prometheus.ignisai W/AwContents: nativeOnDraw failed; clearing to background color.
11-14 00:52:35.217 8568-8568/comi.coding.prometheus.ignisai W/AwContents: nativeOnDraw failed; clearing to background color.
11-14 00:52:35.237 8568-8568/comi.coding.prometheus.ignisai W/AwContents: nativeOnDraw failed; clearing to background color.
11-14 00:52:35.247 8568-8568/comi.coding.prometheus.ignisai W/AwContents: nativeOnDraw failed; clearing to background color.
11-14 00:52:35.267 8568-8568/comi.coding.prometheus.ignisai W/AwContents: nativeOnDraw failed; clearing to background color.
11-14 00:52:35.287 8568-8568/comi.coding.prometheus.ignisai W/AwContents: nativeOnDraw failed; clearing to background color.
11-14 00:52:35.297 8568-8568/comi.coding.prometheus.ignisai W/AwContents: nativeOnDraw failed; clearing to background color.
11-14 00:52:35.317 8568-8568/comi.coding.prometheus.ignisai W/AwContents: nativeOnDraw failed; clearing to background color.
11-14 00:52:35.337 8568-8568/comi.coding.prometheus.ignisai W/AwContents: nativeOnDraw failed; clearing to background color.
11-14 00:52:35.347 8568-8568/comi.coding.prometheus.ignisai W/AwContents: nativeOnDraw failed; clearing to background color.
11-14 00:52:35.367 8568-8568/comi.coding.prometheus.ignisai W/AwContents: nativeOnDraw failed; clearing to background color.
11-14 00:52:35.387 8568-8568/comi.coding.prometheus.ignisai W/AwContents: nativeOnDraw failed; clearing to background color.
11-14 00:52:35.397 8568-8568/comi.coding.prometheus.ignisai W/AwContents: nativeOnDraw failed; clearing to background color.
11-14 00:52:35.417 8568-8568/comi.coding.prometheus.ignisai W/AwContents: nativeOnDraw failed; clearing to background color.
11-14 00:52:35.437 8568-8568/comi.coding.prometheus.ignisai W/AwContents: nativeOnDraw failed; clearing to background color.
11-14 00:52:35.447 8568-8568/comi.coding.prometheus.ignisai W/AwContents: nativeOnDraw failed; clearing to background color.

这样做：

SecondActivity.java:

package comi.coding.prometheus.ignisai;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
import android.webkit.WebView;
import android.webkit.WebViewClient;

public class Browser extends Activity {
    private WebView webView;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_browser);
        String url = "http://google.com";
        webView = (WebView) findViewById(R.id.webBrowser);
        webView.setWebViewClient(new MyWebViewClient());            
        webView.getSettings().setJavaScriptEnabled(true);
        webView.loadUrl(url);
    }

    private class MyWebViewClient extends WebViewClient {
        @Override
        public boolean shouldOverrideUrlLoading(WebView view, String url) {
            view.loadUrl(url);
            Log.d("Tag Name", "Browser class running");
            return true;
        }
    }
}

如果您有任何疑问，请在下面进行注释。
您需要将所有
WebView
初始化从
WebViewClient
移动到
onCreate（）
。是否进行了建议的编辑，对代码没有明显影响。更新问题以反映新代码。实际上，您必须告诉它加载URL。目前，您的代码所做的只是获取对WebView的引用并设置其客户端。哦，抱歉，我误解了。谢谢，工作得很好。代码工作得很好，但每当我尝试并点击按钮（添加了一个用于简单导航的点击方法）时，它就会关闭第二个活动。这是因为报税表是如何设置的吗？非常感谢。我在
SecondActivity.java
中找不到任何按钮。哦，对不起，忘记发布新代码了。没关系，不能在atm机上邮寄
11-14 00:52:21.077 8568-8568/? D/dalvikvm: Late-enabling CheckJNI
11-14 00:52:21.287 8568-8568/comi.coding.prometheus.ignisai W/dalvikvm: VFY: unable to find class referenced in signature (Landroid/view/SearchEvent;)
11-14 00:52:21.287 8568-8568/comi.coding.prometheus.ignisai I/dalvikvm: Could not find method android.view.Window$Callback.onSearchRequested, referenced from method android.support.v7.internal.view.WindowCallbackWrapper.onSearchRequested
11-14 00:52:21.287 8568-8568/comi.coding.prometheus.ignisai W/dalvikvm: VFY: unable to resolve interface method 17897: Landroid/view/Window$Callback;.onSearchRequested (Landroid/view/SearchEvent;)Z
11-14 00:52:21.287 8568-8568/comi.coding.prometheus.ignisai D/dalvikvm: VFY: replacing opcode 0x72 at 0x0002
11-14 00:52:21.287 8568-8568/comi.coding.prometheus.ignisai I/dalvikvm: Could not find method android.view.Window$Callback.onWindowStartingActionMode, referenced from method android.support.v7.internal.view.WindowCallbackWrapper.onWindowStartingActionMode
11-14 00:52:21.287 8568-8568/comi.coding.prometheus.ignisai W/dalvikvm: VFY: unable to resolve interface method 17901: Landroid/view/Window$Callback;.onWindowStartingActionMode (Landroid/view/ActionMode$Callback;I)Landroid/view/ActionMode;
11-14 00:52:21.287 8568-8568/comi.coding.prometheus.ignisai D/dalvikvm: VFY: replacing opcode 0x72 at 0x0002
11-14 00:52:21.297 8568-8568/comi.coding.prometheus.ignisai I/dalvikvm: Could not find method android.content.res.TypedArray.getChangingConfigurations, referenced from method android.support.v7.internal.widget.TintTypedArray.getChangingConfigurations
11-14 00:52:21.297 8568-8568/comi.coding.prometheus.ignisai W/dalvikvm: VFY: unable to resolve virtual method 422: Landroid/content/res/TypedArray;.getChangingConfigurations ()I
11-14 00:52:21.297 8568-8568/comi.coding.prometheus.ignisai D/dalvikvm: VFY: replacing opcode 0x6e at 0x0002
11-14 00:52:21.297 8568-8568/comi.coding.prometheus.ignisai I/dalvikvm: Could not find method android.content.res.TypedArray.getType, referenced from method android.support.v7.internal.widget.TintTypedArray.getType
11-14 00:52:21.297 8568-8568/comi.coding.prometheus.ignisai W/dalvikvm: VFY: unable to resolve virtual method 444: Landroid/content/res/TypedArray;.getType (I)I
11-14 00:52:21.297 8568-8568/comi.coding.prometheus.ignisai D/dalvikvm: VFY: replacing opcode 0x6e at 0x0002
11-14 00:52:21.367 8568-8568/comi.coding.prometheus.ignisai I/dalvikvm: Could not find method android.content.res.Resources.getDrawable, referenced from method android.support.v7.internal.widget.ResourcesWrapper.getDrawable
11-14 00:52:21.367 8568-8568/comi.coding.prometheus.ignisai W/dalvikvm: VFY: unable to resolve virtual method 385: Landroid/content/res/Resources;.getDrawable (ILandroid/content/res/Resources$Theme;)Landroid/graphics/drawable/Drawable;
11-14 00:52:21.367 8568-8568/comi.coding.prometheus.ignisai D/dalvikvm: VFY: replacing opcode 0x6e at 0x0002
11-14 00:52:21.367 8568-8568/comi.coding.prometheus.ignisai I/dalvikvm: Could not find method android.content.res.Resources.getDrawableForDensity, referenced from method android.support.v7.internal.widget.ResourcesWrapper.getDrawableForDensity
11-14 00:52:21.367 8568-8568/comi.coding.prometheus.ignisai W/dalvikvm: VFY: unable to resolve virtual method 387: Landroid/content/res/Resources;.getDrawableForDensity (IILandroid/content/res/Resources$Theme;)Landroid/graphics/drawable/Drawable;
11-14 00:52:21.367 8568-8568/comi.coding.prometheus.ignisai D/dalvikvm: VFY: replacing opcode 0x6e at 0x0002
11-14 00:52:21.877 8568-8568/comi.coding.prometheus.ignisai I/PGA: Attempting to create new SOCKET connectionn pid = 8568, tid = 8568
11-14 00:52:21.987 8568-8568/comi.coding.prometheus.ignisai I/PGA: New SOCKET connection: comi.coding.prometheus.ignisai (pid 8568, tid 8568)
11-14 00:52:21.987 8568-8568/comi.coding.prometheus.ignisai W/PGA: [8568] egl: eglCreateWindowSurface (0x557607a0, 0x0, 0x78c66f48, 0x7751f0e0)
11-14 00:52:22.057 8568-8568/comi.coding.prometheus.ignisai W/PGA: [8568] egl: eglCreateWindowSurface (0x557607a0, 0x0, 0x78c66f48, 0x7751f0e0) returned
11-14 00:52:22.077 8568-8568/comi.coding.prometheus.ignisai D/OpenGLRenderer: Enabling debug mode 0
11-14 00:52:33.357 8568-8568/comi.coding.prometheus.ignisai V/WebViewChromium: Binding Chromium to the background looper Looper (main, tid 1) {327731e8}
11-14 00:52:33.357 8568-8568/comi.coding.prometheus.ignisai I/chromium: [INFO:library_loader_hooks.cc(112)] Chromium logging enabled: level = 0, default verbosity = 0
11-14 00:52:33.357 8568-8568/comi.coding.prometheus.ignisai I/BrowserProcessMain: Initializing chromium process, renderers=0
11-14 00:52:33.357 8568-9189/comi.coding.prometheus.ignisai W/chromium: [WARNING:proxy_service.cc(888)] PAC support disabled because there is no system implementation
11-14 00:52:33.367 8568-8568/comi.coding.prometheus.ignisai W/PGA: [8568] egl: eglDestroySurface (0x557607a0, 0x78cdb1e0)
11-14 00:52:33.367 8568-8568/comi.coding.prometheus.ignisai W/PGA: [8568] egl: eglDestroySurface (0x557607a0, 0x78cdb1e0) returned
11-14 00:52:33.927 8568-8568/comi.coding.prometheus.ignisai D/dalvikvm: GC_FOR_ALLOC freed 279K, 21% free 2966K/3736K, paused 30ms, total 30ms
11-14 00:52:34.217 8568-8568/comi.coding.prometheus.ignisai W/PGA: [8568] egl: eglCreateWindowSurface (0x557607a0, 0x0, 0x78c8c948, 0x7751f0e0)
11-14 00:52:34.217 8568-8568/comi.coding.prometheus.ignisai W/PGA: [8568] egl: eglCreateWindowSurface (0x557607a0, 0x0, 0x78c8c948, 0x7751f0e0) returned
11-14 00:52:34.217 8568-8568/comi.coding.prometheus.ignisai W/AwContents: nativeOnDraw failed; clearing to background color.
11-14 00:52:34.257 8568-8568/comi.coding.prometheus.ignisai W/AwContents: nativeOnDraw failed; clearing to background color.
11-14 00:52:34.287 8568-8568/comi.coding.prometheus.ignisai W/PGA: [8568] egl: eglDestroySurface (0x557607a0, 0x78c68c80)
11-14 00:52:34.287 8568-8568/comi.coding.prometheus.ignisai W/PGA: [8568] egl: eglDestroySurface (0x557607a0, 0x78c68c80) returned
11-14 00:52:35.187 8568-8568/comi.coding.prometheus.ignisai W/AwContents: nativeOnDraw failed; clearing to background color.
11-14 00:52:35.197 8568-8568/comi.coding.prometheus.ignisai W/AwContents: nativeOnDraw failed; clearing to background color.
11-14 00:52:35.217 8568-8568/comi.coding.prometheus.ignisai W/AwContents: nativeOnDraw failed; clearing to background color.
11-14 00:52:35.237 8568-8568/comi.coding.prometheus.ignisai W/AwContents: nativeOnDraw failed; clearing to background color.
11-14 00:52:35.247 8568-8568/comi.coding.prometheus.ignisai W/AwContents: nativeOnDraw failed; clearing to background color.
11-14 00:52:35.267 8568-8568/comi.coding.prometheus.ignisai W/AwContents: nativeOnDraw failed; clearing to background color.
11-14 00:52:35.287 8568-8568/comi.coding.prometheus.ignisai W/AwContents: nativeOnDraw failed; clearing to background color.
11-14 00:52:35.297 8568-8568/comi.coding.prometheus.ignisai W/AwContents: nativeOnDraw failed; clearing to background color.
11-14 00:52:35.317 8568-8568/comi.coding.prometheus.ignisai W/AwContents: nativeOnDraw failed; clearing to background color.
11-14 00:52:35.337 8568-8568/comi.coding.prometheus.ignisai W/AwContents: nativeOnDraw failed; clearing to background color.
11-14 00:52:35.347 8568-8568/comi.coding.prometheus.ignisai W/AwContents: nativeOnDraw failed; clearing to background color.
11-14 00:52:35.367 8568-8568/comi.coding.prometheus.ignisai W/AwContents: nativeOnDraw failed; clearing to background color.
11-14 00:52:35.387 8568-8568/comi.coding.prometheus.ignisai W/AwContents: nativeOnDraw failed; clearing to background color.
11-14 00:52:35.397 8568-8568/comi.coding.prometheus.ignisai W/AwContents: nativeOnDraw failed; clearing to background color.
11-14 00:52:35.417 8568-8568/comi.coding.prometheus.ignisai W/AwContents: nativeOnDraw failed; clearing to background color.
11-14 00:52:35.437 8568-8568/comi.coding.prometheus.ignisai W/AwContents: nativeOnDraw failed; clearing to background color.
11-14 00:52:35.447 8568-8568/comi.coding.prometheus.ignisai W/AwContents: nativeOnDraw failed; clearing to background color.

package comi.coding.prometheus.ignisai;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
import android.webkit.WebView;
import android.webkit.WebViewClient;

public class Browser extends Activity {
    private WebView webView;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_browser);
        String url = "http://google.com";
        webView = (WebView) findViewById(R.id.webBrowser);
        webView.setWebViewClient(new MyWebViewClient());            
        webView.getSettings().setJavaScriptEnabled(true);
        webView.loadUrl(url);
    }

    private class MyWebViewClient extends WebViewClient {
        @Override
        public boolean shouldOverrideUrlLoading(WebView view, String url) {
            view.loadUrl(url);
            Log.d("Tag Name", "Browser class running");
            return true;
        }
    }
}