Android:使用ViewPager實現左右滑動切換圖片 (簡單版)
阿新 • • 發佈:2019-02-02
ViewPager,它是google SDk中自帶的一個附加包的一個類, 可以使檢視滑動。
步驟:
1、引入android-support-v4.jar包,在主佈局里加入
<android.support.v4.view.ViewPager android:id="@+id/viewPager" android:layout_width="match_parent" android:layout_height="wrap_content" > </android.support.v4.view.ViewPager>
2、載入切換內容
3、ViewPager載入介面卡PagerAdapter
public class MainActivity extends Activity { private ViewPager viewPager; private ArrayList<View> pageview; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); //設定無標題欄 requestWindowFeature(Window.FEATURE_NO_TITLE); setContentView(R.layout.main); viewPager= (ViewPager) findViewById(R.id.viewPager); //查詢佈局檔案用LayoutInflater.inflate LayoutInflater inflater =getLayoutInflater(); View view1 = inflater.inflate(R.layout.item01, null); View view2 = inflater.inflate(R.layout.item02, null); View view3 = inflater.inflate(R.layout.item03, null); //將view裝入陣列 pageview =new ArrayList<View>(); pageview.add(view1); pageview.add(view2); pageview.add(view3); //資料介面卡 PagerAdapter mPagerAdapter = new PagerAdapter(){ @Override //獲取當前窗體介面數 public int getCount() { // TODO Auto-generated method stub return pageview.size(); } @Override //斷是否由物件生成介面 public boolean isViewFromObject(View arg0, Object arg1) { // TODO Auto-generated method stub return arg0==arg1; } //是從ViewGroup中移出當前View public void destroyItem(View arg0, int arg1, Object arg2) { ((ViewPager) arg0).removeView(pageview.get(arg1)); } //返回一個物件,這個物件表明了PagerAdapter介面卡選擇哪個物件放在當前的ViewPager中 public Object instantiateItem(View arg0, int arg1){ ((ViewPager)arg0).addView(pageview.get(arg1)); return pageview.get(arg1); } }; //繫結介面卡 viewPager.setAdapter(mPagerAdapter); } }