Question

我有这个（noob？）的问题，但我现在已经好几个小时都无法理解。

我正在使用ViewPagerIndicator（基于ViewPager）。我需要有3个页面，每个页面都包含一个带有特定URL的Web视图..

我该如何运行？当我有3个页面加载ONE和THE SAME url时，我的所有尝试都会以situaltion结束。我尝试了很多方法 - 但我对代码的理解似乎缺乏一些基础知识。

我的代码：

public class WebPagerProfileActivity extends Activity {

private ViewPager awesomePager;
private static int NUM_AWESOME_VIEWS = 3;
private Context context;
private ViewPagerAdapter awesomeAdapter;
LayoutInflater inflater ;



/** Called when the activity is first created. */

@Override

public void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.webpagerprofile);
context = this;

inflater = (LayoutInflater)
        context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);

awesomeAdapter = new ViewPagerAdapter(context);
awesomePager = (ViewPager) findViewById(R.id.viewpager);
TitlePageIndicator indicator = (TitlePageIndicator)findViewById( R.id.indicator );

awesomePager.setAdapter(awesomeAdapter);
indicator.setViewPager( awesomePager );}

和适配器：

public class ViewPagerAdapter extends PagerAdapter implements TitleProvider

{ private static String[] titles = new String[]
{
    "Profile",
    "Friends",
    "Statistics"
};
private final Context context;

public ViewPagerAdapter( Context context )
{
    this.context = context;
}

//@Override
public String getTitle( int position )
{
    return titles[position];
}

@Override
public int getCount()
{
    return titles.length;
}

@Override
public Object instantiateItem( View pager, int position )
{
    View layout = null; 


    switch (position) {
    case 0: {
        LayoutInflater mInflater =  (LayoutInflater)
                context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    layout  = mInflater.inflate(R.layout.webprofile, null);

    WebView mainContent = (WebView)layout.findViewById(R.id.webview);
    mainContent.getSettings().setJavaScriptEnabled(true);
    mainContent.getSettings().setJavaScriptEnabled(true);
    mainContent.getSettings().setBuiltInZoomControls(true);
    mainContent.requestFocusFromTouch();
    mainContent.setWebViewClient(new WebViewClient());
    mainContent.setWebChromeClient(new WebChromeClient());
    mainContent.loadUrl("http://www.wp.pl");
    }

    case 1: {        LayoutInflater mInflater =  (LayoutInflater)
            context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    layout  = mInflater.inflate(R.layout.webfriends, null);

    WebView mainContent = (WebView)layout.findViewById(R.id.webviewfriends);
    mainContent.getSettings().setJavaScriptEnabled(true);
    mainContent.getSettings().setJavaScriptEnabled(true);
    mainContent.getSettings().setBuiltInZoomControls(true);
    mainContent.requestFocusFromTouch();
    mainContent.setWebViewClient(new WebViewClient());
    mainContent.setWebChromeClient(new WebChromeClient());
    mainContent.loadUrl("http://www.onet.pl");
    }

    case 2: {        LayoutInflater mInflater =  (LayoutInflater)
            context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    layout  = mInflater.inflate(R.layout.webstatistics, null);

    WebView mainContent = (WebView)layout.findViewById(R.id.webviewstatistics);
    mainContent.getSettings().setJavaScriptEnabled(true);
    mainContent.getSettings().setJavaScriptEnabled(true);
    mainContent.getSettings().setBuiltInZoomControls(true);
    mainContent.requestFocusFromTouch();
    mainContent.setWebViewClient(new WebViewClient());
    mainContent.setWebChromeClient(new WebChromeClient());
    mainContent.loadUrl("http://www.google.pl");
    }

    }

    ((ViewPager) pager).addView((View)layout,0);

    return layout;
}

@Override
public void destroyItem( View pager, int position, Object view )
{
    //((ViewPager)pager).removeView( (WebView)view );
}

@Override
public boolean isViewFromObject( View view, Object object )
{
    return view.equals( object );
}

@Override
public void finishUpdate( View view ) {}

@Override
public void restoreState( Parcelable p, ClassLoader c ) {}

@Override
public Parcelable saveState() {
    return null;
}

@Override
public void startUpdate( View view ) {}

}

Answer 1

您在交换机中遗漏了休息时间。在所有情况下，它们都会级联到最后一个。你需要在每一个之后打破。

Answer 2

您的break声明中没有switch个陈述。因此，您可能会遇到所有情况，重新创建内容最多3次，直到您触及底部并最终显示带有“http://www.google.pl”的内容。像这样添加break：

switch (position) {
case 0: {
    LayoutInflater mInflater =  (LayoutInflater)
            context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    layout  = mInflater.inflate(R.layout.webprofile, null);

    WebView mainContent = (WebView)layout.findViewById(R.id.webview);
    mainContent.getSettings().setJavaScriptEnabled(true);
    mainContent.getSettings().setJavaScriptEnabled(true);
    mainContent.getSettings().setBuiltInZoomControls(true);
    mainContent.requestFocusFromTouch();
    mainContent.setWebViewClient(new WebViewClient());
    mainContent.setWebChromeClient(new WebChromeClient());
    mainContent.loadUrl("http://www.wp.pl");
}
break;

等

使用具有多个webview的ViewPagerIndicator（viewpager）

2 个答案: