小编Ser*_*his的帖子

我试图以完全相同的方式修改两个TextView.我以为我可以给它们相同的id,并且使用findViewById()和setText()方法将这些TextViews改为两行.但似乎只有一个TextView被更改.

有没有办法做到这一点？或者我必须为每个元素创建不同的id,通过findViewById()方法获取每个元素并设置它的文本？

我对堆栈跟踪的解释有一个问题.问题是我的包中没有类,所以我很难找出发生的事情.当我吞下踪迹时,我认为这是关于适配器和微调器,但在那个页面上我有6个微调器,我调试它们并没有发现任何奇怪的东西(比如selectedItemPosition或者什么)..

也许有人有类似的问题？这是追踪.如果您需要一些代码,请告诉我

    Uncaught handler: thread main exiting due to uncaught exception
    java.lang.IndexOutOfBoundsException
     at java.util.Arrays$ArrayList.get(Arrays.java:72)
     at android.widget.ArrayAdapter.getItem(ArrayAdapter.java:298)
     at android.widget.ArrayAdapter.createViewFromResource(ArrayAdapter.java:351)
     at android.widget.ArrayAdapter.getView(ArrayAdapter.java:323)
     at android.widget.AbsSpinner.onMeasure(AbsSpinner.java:198)
     at android.view.View.measure(View.java:7987)
     at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:3023)
     at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:888)
     at android.widget.LinearLayout.measureVertical(LinearLayout.java:350)
     at android.widget.LinearLayout.onMeasure(LinearLayout.java:278)
     at android.view.View.measure(View.java:7987)
     at android.widget.ScrollView.measureChildWithMargins(ScrollView.java:893)
     at android.widget.FrameLayout.onMeasure(FrameLayout.java:245)
     at android.widget.ScrollView.onMeasure(ScrollView.java:276)
     at android.view.View.measure(View.java:7987)
     at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:3023)
     at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:888)
     at android.widget.LinearLayout.measureVertical(LinearLayout.java:350)
     at android.widget.LinearLayout.onMeasure(LinearLayout.java:278)
     at android.view.View.measure(View.java:7987)
     at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:3023)
     at android.widget.FrameLayout.onMeasure(FrameLayout.java:245)
     at android.view.View.measure(View.java:7987)
     at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:3023)
     at android.widget.FrameLayout.onMeasure(FrameLayout.java:245)
     at android.view.View.measure(View.java:7987)
     at android.view.ViewRoot.performTraversals(ViewRoot.java:763)
     at android.view.ViewRoot.handleMessage(ViewRoot.java:1633)
     at android.os.Handler.dispatchMessage(Handler.java:99)
     at android.os.Looper.loop(Looper.java:123)
     at android.app.ActivityThread.main(ActivityThread.java:4363)
     at java.lang.reflect.Method.invokeNative(Native Method)
     at java.lang.reflect.Method.invoke(Method.java:521)
     at …

我正在创建具有三个视图的ViewPager.在第一个视图是ListView,其中onItemClick用其中的WebView替换该片段的新片段.我有两个问题:添加'transaction.addToBackStack(null)'或'transaction.setCustomAnimations(...)'片段与WebView停止显示.没有这些线显示,但我不能按BACK按钮返回列表.

我正在基于该教程和这个问题创建代码.在那个问题中,使用了PagerAdapter,我正在使用FragmentPagerAdapter.此外,我不需要更换更多碎片.它只能是一次(从列表到webView和返回).

这是我的适配器代码:

public Fragment getItem( int position )
{
    Fragment fragment = null;
    switch ( position )
    {
        case 0: // news
            if ( mFragmentAtPos0 == null )
            {
                mFragmentAtPos0 = new NewsListFragment( new FirstPageFragmentListener()
                {
                    @Override
                    public void onSwitchToNewsFragment( String url, ViewGroup container )
                    {
                        FragmentTransaction transaction = fm.beginTransaction();
                        transaction.setCustomAnimations( R.anim.rotate_in, R.anim.rotate_out, R.anim.rotate_in, R.anim.rotate_out );

                        WebViewFragment wv = new WebViewFragment( url, context );
                        transaction.replace( container.getId(), wv );
                        transaction.commit();

                        mFragmentAtPos0 = wv;
                        notifyDataSetChanged();
                    }
                } …

我正在尝试在我的Android应用中使用Facebook SDK.这是片段:

Facebook myFacebook = new Facebook("123456789012345");
myFacebook.authorize(LogInScreen.this, 
    new String[] {
        "publish_stream", 
        "email", 
        "user_about_me", 
        "user_birthday", 
        "user_website", 
        "friends_photos", 
        "user_photos"},
    Facebook.FORCE_DIALOG_AUTH,
    new DialogListener(){

        @Override
        public void onCancel() {
            Log.i("Facebook", "Facebook - cancel");
        }

        @Override
        public void onComplete(Bundle arg0) {
            Log.i("Facebook", "Facebook - complete, AccessToken: " + myFacebook.getAccessToken());
        }

        @Override
        public void onError(DialogError arg0) {
            Log.i("Facebook", "Facebook - error");
        }

        @Override
        public void onFacebookError(FacebookError error) {
            Log.i("Facebook", "Facebook - facebookError: " + error);
                    try {
                        myFacebook.logout(LogInScreen.this);
                    } catch (MalformedURLException e) {
                        e.printStackTrace();
                    } …

布局有点问题.我已经创建了RelativeLayout,其中我放置了两个LinearLayouts(1和2),并在它们之间使用LinearLayout ScrollView.接下来,我将ScrollView设置为在linearLayout2和linearLayout1之上.但ScrollView中的LinearLayout未设置为其父级.

这是代码,也许我犯了一个错误:

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="wrap_content">

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"        
        android:padding="6dip"
        android:layout_alignParentTop="true"
        android:id="@+id/lin1"
        android:layout_weight="1">

</LinearLayout>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
        android:layout_width="fill_parent"
        android:layout_alignParentBottom="true"
        android:layout_weight="1" android:id="@+id/lin3" 
        android:layout_height="60dip">          

</LinearLayout>

<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent" 
android:scrollbars="horizontal"
android:layout_below="@id/lin1"
android:layout_above="@id/lin3" android:id="@+id/ScrollView">

<LinearLayout
        android:layout_width="fill_parent"                      
        android:orientation="vertical"
        android:id="@+id/lin2" 
        android:layout_height="fill_parent"  
        android:layout_gravity="center_vertical|center_horizontal">

    <Button android:text="@string/button1" 
        android:id="@+id/button1" 
        android:layout_gravity="center" 
        android:layout_width="280dip" 
        android:layout_height="60dip">
    </Button>

    <Button android:text="@string/button2"
        android:id="@+id/button2" 
        android:layout_gravity="center" 
        android:layout_width="280dip" 
        android:layout_height="60dip">
    </Button>

    <Button android:text="@string/button3" 
        android:id="@+id/button3" 
        android:layout_gravity="center" 
        android:layout_width="280dip" 
        android:layout_height="60dip">
    </Button>

    <Button android:text="@string/button4"
        android:id="@+id/button4" 
        android:layout_gravity="center" 
        android:layout_width="280dip" 
        android:layout_height="60dip">
    </Button>


</LinearLayout>
</ScrollView>

任何想法,为什么ScrollView中的LinearLayout比ScrollView更大？

编辑:到目前为止,我已经注意到当我设置layout_gravity ="center_vertical"时,ScrollView内部的LinearLayout移动到外面.看起来设置中心是指主要布局(RelativeLayout).