View flipper is not flipping

问题

Is this even possible? I created this view flipper and I am calling the view flipper from the onClick inside of the xml layout. I have created a view flipper before but for some reason it's not working.

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:cacheColorHint="@android:color/transparent"
    android:orientation="vertical" >

    <ViewFlipper
        android:id="@+id/viewFlipper1"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:background="@null"
        android:cacheColorHint="@android:color/transparent" >

        <LinearLayout
            xmlns:android="http://schemas.android.com/apk/res/android"
            android:id="@+id/vf_sample1_main"
            android:layout_width="fill_parent"
            android:layout_height="fill_parent"
            android:cacheColorHint="@android:color/transparent"
            android:orientation="vertical" >

            <include layout="@layout/headers_main" />

            <include layout="@layout/searchbar" />

            <TextView
                android:id="@+id/sdfsd"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_gravity="center_horizontal"
                android:gravity="center_horizontal"
                android:maxHeight="85dp"
                android:paddingBottom="10dp"
                android:paddingTop="10dp"
                onClick="gotoSomething"
                android:singleLine="false" />

            <TextView
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:textColor="@color/aquablue"
                android:textSize="15dp"
                android:textStyle="bold" />

            <include layout="@layout/listview_item_row_now_playing_info" />

            <TextView
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:textColor="@color/aquablue"
                android:textSize="15dp"
                android:textStyle="bold" />

            <include layout="@layout/container_listview" />
        </LinearLayout>

        <LinearLayout
            xmlns:android="http://schemas.android.com/apk/res/android"
            android:id="@+id/vf_sdfsdfadf"
            android:layout_width="fill_parent"
            android:layout_height="fill_parent"
            android:background="@null"
            android:cacheColorHint="@android:color/transparent"
            android:orientation="vertical" >

            <include layout="@layout/header_vf_asdfasdfadadafsd" />
        </LinearLayout>

        <LinearLayout
            xmlns:android="http://schemas.android.com/apk/res/android"
            android:id="@+id/vf_adsfasdfadsfasd"
            android:layout_width="fill_parent"
            android:layout_height="fill_parent"
            android:background="@null"
            android:cacheColorHint="@android:color/transparent"
            android:orientation="vertical" >
        </LinearLayout>

    </ViewFlipper>

</LinearLayout>

code:

 public class BeatSpotPrototypeActivity extends BaseListActivity {
        private final String TAG = BeatSpotPrototypeActivity.class.getSimpleName();
        private ApplicationStateManager mAppStateMananger = ApplicationStateManager.GetInstance();
        private Context mCtx = null;
        private boolean mIsInitalized = false;
        private boolean mDataChanded= false;
        private ViewFlipper mViewFlipper= null;
        private DrawableManager mDrawManager = new DrawableManager();
        private enum ViewFlipperModes {
            MAIN (0),
            NOW_PLAYING (1),
            SONG_INFORMATION (2);

            private final int index;   

            ViewFlipperModes(int index) {
                this.index = index;
            }

            public int index() { 
                return index; 
            }
        }
        </code>
    <code>
        public void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.main_beatspot_activity);

            if (!mIsInitalized)
                init();
            else
                mDataChanded = true;
            showLoading(false);

        }

        private void init() {
            mCtx                                            = this;
            mIsInitalized                                   = true;
            mViewFlipper                                    = (ViewFlipper)findViewById(R.id.viewFlipper);
            fadeDrawables();
        }


        public void gotoBeatspotMain(View v) {
            mViewFlipper.setDisplayedChild(ViewFlipperModes.MAIN.index());
        }

        public void gotoNowPlaying(View v) {
            Log.d(TAG, mViewFlipper.getCurrentView().toString());
            mViewFlipper.setDisplayedChild(ViewFlipperModes.NOW_PLAYING.index());
        }

        public void gotoSongDetails(View v) {
            mViewFlipper.setDisplayedChild(ViewFlipperModes.SONG_INFORMATION.index());
            Log.d(TAG, String.valueOf(ViewFlipperModes.SONG_INFORMATION.index()));
        }

    }

回答1:

before on create

ViewFlipper mViewFlipper = (ViewFlipper)findViewbyId(location);

on your onCreate() or onStart

Ensure that whatever your layout on setcontentView(R.layout.something) does contain the view flipper

Also try this for me. before this line mViewFlipper.setDisplayedChild(ViewFlipperModes.MAIN.index()); Type in:

int i = (ViewFlipperModes.MAIN.index()); place a debug point here
mViewFlipper.setDisplayedChild(i);

I also suggest using the debugger to try figure out if your flip views events are being called inside the debugger.

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/book_as_whole_Layout"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical" 
    android:background="#FFFFFF">

    <ViewFlipper 
            android:layout_marginTop="20dip"
            android:layout_marginLeft="20dip"
            android:layout_marginRight="20dip"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:id="@+id/ViewFlipper">
        <LinearLayout 
            android:layout_width="match_parent"
            android:layout_height="match_parent">

        <TextView 
            android:id="@+id/page1"
            android:text="@string/loading_string"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:textColor="#000000"
            android:typeface="serif"/>  

        </LinearLayout>

        <LinearLayout 
            android:layout_width="match_parent"
            android:layout_height="match_parent">
        <TextView 
            android:id="@+id/page2"
            android:text="@string/loading_string"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:textColor="#000000"
            android:typeface="serif" />  
        </LinearLayout>

    </ViewFlipper>


</LinearLayout>

回答2:

setDisplayedChild takes an index, not an id.

来源：https://stackoverflow.com/questions/10725855/view-flipper-is-not-flipping