模擬器上的webview啟動畫面問題

Question

在我向應用程序添加了初始屏幕功能之前，我的應用程序運行良好。 我試圖遵循一些互聯網上可用的解決方案。 當我在android模擬器中執行我的應用幾秒鍾時，就會出現問題，它向我顯示一個警告框，其中顯示以下語句

等待調試器

應用程序TestApp（進程com.testapp.mytestapp）正在等待調試器附加。

強制關閉按鈕

之后，我的應用程序運行完全正常。 我仍然不確定是由於錯誤的編碼技巧而導致錯誤，錯誤還是其他原因，並且我在代碼中犯了錯誤或遺漏了某些內容。 我也想增加啟動畫面的持續時間（以某種方式可能），因為有時啟動畫面在完全加載網頁之前就消失了，但是由於我是Android開發的新手，所以我無法找出合適的解決方案或參考以下內容。 此外，我的模擬器版本是Nexus 4 API 22

這是我的主要MyActivity課程

package com.testapp.mytestapp;

import android.app.Activity;
import android.app.AlertDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.graphics.Bitmap;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.net.Uri;
import android.os.Bundle;
import android.view.KeyEvent;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.webkit.WebChromeClient;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import android.widget.FrameLayout;
import java.io.File;
import static com.testapp.mytestapp.R.*;


public class MyActivity extends Activity {
    private WebView webView;
    private FrameLayout customViewContainer;
    private WebChromeClient.CustomViewCallback customViewCallback;
    private View mCustomView;
    private myWebChromeClient mWebChromeClient;
    private myWebViewClient mWebViewClient;

    /**
     * Called when the activity is first created.
     */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        customViewContainer = (FrameLayout) findViewById(R.id.customViewContainer);
        webView = (WebView) findViewById(R.id.webView);
        ConnectivityManager conMgr = (ConnectivityManager) getApplicationContext().getSystemService(this.CONNECTIVITY_SERVICE);
        NetworkInfo netInfo = conMgr.getActiveNetworkInfo();

        if (netInfo == null || !netInfo.isConnected() || !netInfo.isAvailable()) {

            AlertDialog alertDialog;
            alertDialog = new AlertDialog.Builder(this, style.AlertDialogCustom).create();
            alertDialog.setTitle("Communication Error");
            alertDialog.setMessage("Please make sure that internet connection is active.");
            alertDialog.setButton("OK", new DialogInterface.OnClickListener() {
                public void onClick(DialogInterface dialog, int which) {
                    finish();
                }
            });
            alertDialog.show();
        } else {
            AppRater appRater = new AppRater(this);
            appRater.setDaysBeforePrompt(1);
            appRater.setLaunchesBeforePrompt(3);
            appRater.setPhrases("Rate This App",
                    "If you like our App don't forget to rate our application on Google Play. Thanks for your support!",
                    "Rate Now", "Later", "Ignore");
            appRater.setTargetUri("https://play.google.com/store/apps/details?id=" + getApplicationContext().getPackageName());
            appRater.show();
            customViewContainer = (FrameLayout) findViewById(R.id.customViewContainer);
            webView = (WebView) findViewById(R.id.webView);
            mWebViewClient = new myWebViewClient();
            webView.setWebViewClient(mWebViewClient);
            mWebChromeClient = new myWebChromeClient();
            webView.setWebChromeClient(mWebChromeClient);
            webView.getSettings().setJavaScriptEnabled(true);
            webView.getSettings().setAppCacheEnabled(true);
            webView.getSettings().setSaveFormData(true);
            webView.loadUrl("https://custom-domain-name.com");
            webView.setWebViewClient(new MyAppWebViewClient() {
                @Override
                public void onPageFinished(WebView view, String url) {
                    //hide loading image
                    findViewById(R.id.imageLoading1).setVisibility(View.GONE);
                    //show webview
                    findViewById(R.id.customViewContainer).setVisibility(View.VISIBLE);
                }
            });
        }
    }

    public boolean inCustomView() {
        return (mCustomView != null);
    }

    public void hideCustomView() {
        mWebChromeClient.onHideCustomView();
    }

    @Override
    protected void onPause() {
        super.onPause();    //To change body of overridden methods use File | Settings | File Templates.
        webView.onPause();
    }

    @Override
    protected void onResume() {
        super.onResume();    //To change body of overridden methods use File | Settings | File Templates.
        webView.onResume();
    }

    @Override
    protected void onStop() {
        super.onStop();    //To change body of overridden methods use File | Settings | File Templates.
        if (inCustomView()) {
            hideCustomView();
        }
    }

    @Override
    public boolean onKeyDown(int keyCode, KeyEvent event) {
        if (keyCode == KeyEvent.KEYCODE_BACK) {

            if (inCustomView()) {
                hideCustomView();
                return true;
            }

            if ((mCustomView == null) && webView.canGoBack()) {
                webView.goBack();
                return true;
            }
        }
        return super.onKeyDown(keyCode, event);
    }

    class myWebChromeClient extends WebChromeClient {
        private Bitmap mDefaultVideoPoster;
        private View mVideoProgressView;

        @Override
        public void onShowCustomView(View view, int requestedOrientation, CustomViewCallback callback) {
           onShowCustomView(view, callback);    //To change body of overridden methods use File | Settings | File Templates.
        }

        @Override
        public void onShowCustomView(View view,CustomViewCallback callback) {

            // if a view already exists then immediately terminate the new one
            if (mCustomView != null) {
                callback.onCustomViewHidden();
                return;
            }
            mCustomView = view;
            webView.setVisibility(View.GONE);
            customViewContainer.setVisibility(View.VISIBLE);
            customViewContainer.addView(view);
            customViewCallback = callback;
        }

        @Override
        public View getVideoLoadingProgressView() {

            if (mVideoProgressView == null) {
                LayoutInflater inflater = LayoutInflater.from(MyActivity.this);
                mVideoProgressView = inflater.inflate(R.layout.video_progress, null);
            }
            return mVideoProgressView;
        }

        @Override
        public void onHideCustomView() {
            super.onHideCustomView();    //To change body of overridden methods use File | Settings | File Templates.
            if (mCustomView == null)
                return;

            webView.setVisibility(View.VISIBLE);
            customViewContainer.setVisibility(View.GONE);

            // Hide the custom view.
            mCustomView.setVisibility(View.GONE);

            // Remove the custom view from its container.
            customViewContainer.removeView(mCustomView);
            customViewCallback.onCustomViewHidden();

            mCustomView = null;
        }
    }

    class myWebViewClient extends WebViewClient {
        @Override
        public boolean shouldOverrideUrlLoading(WebView view, String url) {
        return super.shouldOverrideUrlLoading(view, url);    //To change body of overridden methods use File | Settings | File Templates.
        }
    }
    @Override
    protected void onDestroy() {
        super.onDestroy();
        try {
            trimCache(); //if trimCache is static
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    public void trimCache() {
        try {
            File dir = getCacheDir();
            if (dir != null && dir.isDirectory()) {
                deleteDir(dir);
            }
        } catch (Exception e) {
            // TODO: handle exception
        }
    }

    public static boolean deleteDir(File dir) {
        if (dir != null && dir.isDirectory()) {
            String[] children = dir.list();
            for (int i = 0; i < children.length; i++) {
                boolean success = deleteDir(new File(dir, children[i]));
                if (!success) {
                    return false;
                }
            }
            return dir.delete();
        }
        return false;
    }


}

這是我的MyAppWebViewClient類

package com.testapp.mytestapp;

import android.content.Intent;
import android.net.Uri;
import android.webkit.WebView;
import android.webkit.WebViewClient;
public class MyAppWebViewClient extends WebViewClient {

    @Override
    public boolean shouldOverrideUrlLoading(WebView view, String url) {
        if(Uri.parse(url).getHost().endsWith("custom-domain-name.com")) {
            return false;
        }

        Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse(url));
        view.getContext().startActivity(intent);
        return true;
    }
}

這是我的AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
          package="com.testapp.mytestapp" >
    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
    <uses-permission android:name="android.permission.INTERNET" />
    <uses-permission android:name="android.permission.CLEAR_APP_CACHE"/>
    <application android:label="@string/app_name" android:icon="@drawable/ic_launcher"
            android:hardwareAccelerated="true">
        <activity android:name=".MyActivity"
                  android:configChanges="orientation|keyboardHidden"
                  android:hardwareAccelerated="true"
                  android:label="@string/app_name"
                    android:theme="@android:style/Theme.NoTitleBar.Fullscreen">
            <intent-filter>
                <action android:name="android.intent.action.MAIN"/>
                <category android:name="android.intent.category.LAUNCHER"/>
            </intent-filter>
        </activity>
    </application>
</manifest>

這是我的布局的main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
              android:orientation="vertical"
              android:layout_width="fill_parent"
              android:layout_height="fill_parent"
        >
    <ImageView android:id="@+id/imageLoading1"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:visibility="visible"
        android:src="@drawable/splash_me2"
        android:scaleType = "centerCrop" />
    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" />
    <WebView
            android:layout_width="fill_parent"
            android:layout_height="fill_parent"
            android:id="@+id/webView"
            android:layout_gravity="center"
            />
    <FrameLayout
            android:id="@+id/customViewContainer"
            android:layout_width="fill_parent"
            android:layout_height="fill_parent"
            android:visibility="gone"
            />
</LinearLayout>

這是我的LogCat日志

11-30 16:10:06.709: E/Launcher(1465): Unable to launch. tag=ApplicationInfo(title=TestApp  P=UserHandle{0}) intent=Intent { act=android.intent.action.MAIN cat=[android.intent.category.LAUNCHER] flg=0x10200000 cmp=com.testapp.mytestapp/.MyActivity (has extras) }
11-30 16:10:06.709: E/Launcher(1465): android.content.ActivityNotFoundException: Unable to find explicit activity class {com.testapp.mytestapp/com.testapp.mytestapp.MyActivity}; have you declared this activity in your AndroidManifest.xml?
11-30 16:16:20.860: E/InputDispatcher(1244): channel '2fc7fe4c com.testapp.mytestapp/com.testapp.mytestapp.MyActivity (server)' ~ Channel is unrecoverably broken and will be disposed!

Answer 1

這不是錯誤消息，僅表示您在調試模式下運行應用程序，調試器需要一秒鍾的時間才能連接。 帶有灰色錯誤的按鈕將在調試模式下運行，如果您只想運行應用程序，請使用另一個綠色播放按鈕

Answer 2

您可以忽略來自調試器的消息，有時僅需要一點時間即可在仿真器中運行。

您可以在WebChromeClient上跟蹤進度，並檢查進度為100。

webView.setWebChromeClient(new myWebChromeClient() { 

    public void onProgressChanged(WebView view, int progress) { 

      if (progress == 100) { 
         //...page is fully loaded. 
         findViewById(R.id.imageLoading1).setVisibility(View.GONE); 
        //show webview 
        findViewById(R.id.customViewContainer).setVisibility(View.VISIBLE); 
       } 
    } 
});