Android Control Learning (4): combining ViewPager and TabHost with Java code, viewpagertabhost

Android Control Learning (4): combining ViewPager and TabHost with Java code, viewpagertabhost

Import java. util. ArrayList;

Import java. util. List;

Import android. app. LocalActivityManager;

Import android. app. TabActivity;

Import android. content. Context;

Import android. content. Intent;

Importandroid. graphics. BitmapFactory;

Import android. graphics. Matrix;

Import android. OS. Bundle;

Import android. OS. Parcelable;

Import android. support. v4.view. PagerAdapter;

Importandroid. support. v4.view. ViewPager;

Importandroid. support. v4.view. ViewPager. OnPageChangeListener;

Import android. util. DisplayMetrics;

Import android. util. Log;

Import android. view. View;

Import android. view. Window;

Importandroid. view. animation. Animation;

Importandroid. view. animation. TranslateAnimation;

Import android. widget. ImageView;

Import android. widget. TabHost;

Import android. widget. TextView;

Public class AniTestActivity extends TabActivity {

// Page card content

Private ViewPager mPager;

// Tab page list

Private List listViews;

// Animated Image

Private ImageView cursor;

// Tab

Private TextView t1, t2, t3;

// Specifies the animation offset.

Private int offset = 0;

// Current page card number

Private int currIndex = 0;

// Animation Image Width

Private int bmp w;

Private LocalActivityManager manager = null;

Private final static String TAG = "ConfigTabActivity ";

Private final Context context = AniTestActivity. this;

Private TabHost mTabHost;

@ Override

Public void onCreate (Bundle savedInstanceState ){

Super. onCreate (savedInstanceState );

Log. d (TAG, "--- onCreate ---");

RequestWindowFeature (Window. FEATURE_NO_TITLE );

SetContentView (R. layout. main );

MTabHost = getTabHost ();

MTabHost. addTab (mTabHost. newTabSpec ("A"). setIndicator (

""). SetContent (

New Intent (this, A. class )));

MTabHost. addTab (mTabHost. newTabSpec ("B"). setIndicator (

""). SetContent (

New Intent (this, B. class )));

MTabHost. addTab (mTabHost. newTabSpec ("C"). setIndicator (

""). SetContent (

New Intent (this, C. class )));

MTabHost. setCurrentTab (0 );

Manager = new LocalActivityManager (this, true );

Manager. dispatchCreate (savedInstanceState );

InitImageView ();

InitTextView ();

InitViewPager ();

}

Private void InitTextView (){

T1 = (TextView) findViewById (R. id. text1 );

T2 = (TextView) findViewById (R. id. text2 );

T3 = (TextView) findViewById (R. id. text3 );

T1.setOnClickListener (newMyOnClickListener (0 ));

T2.setOnClickListener (newMyOnClickListener (1 ));

T3.setOnClickListener (newMyOnClickListener (2 ));

}

Private void InitViewPager (){

MPager = (ViewPager) findViewById (R. id. vPager );

ListViews = new ArrayList ();

MyPagerAdapter mpAdapter = new MyPagerAdapter (listViews );

Intent intent = new Intent (context, A. class );

ListViews. add (getView ("Black", intent ));

Intent intent2 = new Intent (context, B. class );

ListViews. add (getView ("Gray", intent2 ));

Intent intent3 = new Intent (context, C. class );

ListViews. add (getView ("White", intent3 ));

MPager. setAdapter (mpAdapter );

MPager. setCurrentItem (0 );

MPager. setOnPageChangeListener (newMyOnPageChangeListener ());

}

Private void InitImageView (){

Cursor = (ImageView) findViewById (R. id. cursor );

Bmp w = BitmapFactory. decodeResource (getResources (), R. drawable. a4)

. GetWidth (); // obtain the image width.

DisplayMetrics dm = new DisplayMetrics ();

GetWindowManager (). getDefaultDisplay (). getMetrics (dm );

Int screenW = dm. widthPixels; // gets the resolution width.

Offset = (screenW/3-bmp w)/2; // calculates the offset.

Matrix matrix = new Matrix ();

Matrix. postTranslate (offset, 0 );

Cursor. setImageMatrix (matrix); // you can specify the initial animation position.

}

Public class MyPagerAdapter extends PagerAdapter {

Public List mListViews;

PublicMyPagerAdapter (List mListViews ){

This. mListViews = mListViews;

}

@ Override

Public void destroyItem (View arg0, int arg1, Object arg2 ){

(ViewPager) arg0). removeView (mListViews. get (arg1 ));

}

@ Override

Public void finishUpdate (View arg0 ){

}

@ Override

Public int getCount (){

Return mListViews. size ();

}

@ Override

Public Object instantiateItem (View arg0, int arg1 ){

(ViewPager) arg0). addView (mListViews. get (arg1), 0 );

Return mListViews. get (arg1 );

}

@ Override

Public boolean isViewFromObject (View arg0, Object arg1 ){

Return arg0 = (arg1 );

}

@ Override

Public void restoreState (Parcelable arg0, ClassLoader arg1 ){

}

@ Override

Public Parcelable saveState (){

Return null;

}

@ Override

Public void startUpdate (View arg0 ){

}

}

Public class MyOnClickListener implementsView. OnClickListener {

Private int index = 0;

Public MyOnClickListener (int I ){

Index = I;

}

@ Override

Public void onClick (View v ){

MPager. setCurrentItem (index );

}

};

Public class MyOnPageChangeListener implementsOnPageChangeListener {

Int one = offset * 2 + bmp w; // page Card 1-> page Card 2 offset

Int two = one * 2; // page Card 1-> page card 3 offset

@ Override

Public void onPageSelected (int arg0 ){

Animation animation = null;

Intent intent = new Intent ();

Switch (arg0 ){

Case 0:

Log. d (TAG, "--- 0 ---");

MTabHost. setCurrentTab (0 );

If (currIndex = 1 ){

Animation = newTranslateAnimation (one, 0, 0, 0 );

} Else if (currIndex = 2 ){

Animation = newTranslateAnimation (two, 0, 0 );

}

Break;

Case 1:

Log. d (TAG, "--- 1 ---");

MTabHost. setCurrentTab (1 );

If (currIndex = 0 ){

Animation = newTranslateAnimation (offset, one, 0, 0 );

} Else if (currIndex = 2 ){

Animation = new TranslateAnimation (two, one, 0, 0 );

}

Break;

Case 2:

Log. d (TAG, "--- 2 ---");

MTabHost. setCurrentTab (2 );

If (currIndex = 0 ){

Animation = newTranslateAnimation (offset, two, 0, 0 );

} Else if (currIndex = 1 ){

Animation = newTranslateAnimation (one, two, 0, 0 );

}

Break;

}

CurrIndex = arg0;

Animation. setFillAfter (true); // True: the image stops at the animation end position.

Animation. setDuration (300 );

Cursor. startAnimation (animation );

}

@ Override

Public void onPageScrolled (int arg0, float arg1, int arg2 ){

}

@ Override

Public void onPageScrollStateChanged (int arg0 ){

}

}

Private View getView (String id, Intent intent)

{

Return manager. startActivity (id, intent). getDecorView ();

}

}