模拟器上的webview启动画面问题

Question

My app works totally fine until I added a splash screen feature to my app. I tried to follow some solutions available on internet. The problem occurs when I execute my app in android emulator for very few seconds it shows me an alert box showing the following statement

Waiting for Debugger

Application TestApp (process com.testapp.mytestapp) is waiting for the debugger to attach.

Force Close button

And after it my app runs absolutely fine. I am still not sure whether its and error or something else because of my poor coding skills and I made a mistake in my code or missed something. Also I wanted to increase the duration of the Splash Image (somehow possible) because sometimes the splash image disappears before complete loading of the webpage but as I am new to android development I am unable to figure out a proper solution or reference to following. Further my emulator version is Nexus 4 API 22

Here is my Main MyActivity class

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;
    }


}

Here is my MyAppWebViewClient Class

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;
    }
}

Here is my 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>

Here is my layout's 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>

Here is my Log from LogCat

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

This is not an error message, it only indicates you are running your app in debug mode and it takes a second for the debugger to get attached. The button with the grey bug is to run in debug mode, if you just want to run the app use the other green play button

Answer 2

You can ignore that message from the debugger sometimes it just take a little time to run in the emulator.

You could track the progress on your WebChromeClient and check when it's 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); 
       } 
    } 
});