android viewpager 滑動分頁以及禁止劃屏 （模擬新浪）
阿新 • • 發佈：2019-01-04
這一篇將之加工一下，模擬實現新浪裡面的功能,vierpager 分頁.
在新浪微博訊息一欄中是這樣的（注意看title）：
上部分頁欄可以用gridview來實現，不過為了省事在這就用textview代替了.
貼出程式碼：
上面就是所有的程式碼，其實看起來有點小多，不過都挺容易理解的.還有就是前面我寫過一片關於viewpager的介紹，這裡也就不過多講解了.詳細請下載原始碼看吧./*** * ViewPager * * @author zhangjia * */ public class MainActivity extends ActivityGroup implements OnClickListener { private LinearLayout layout;// title private ViewPager pager; private ArrayList<View> pageViews; private LinearLayout layout2; private ArrayList<ImageView> imageViews; private LinearLayout linearLayout; private String title[] = { "one", "two", "three" }; private TextView textView; private ArrayList<View> arrayList;// 用於裝載view private final int linerlayout_height = 80; /*** * init title and pageview */ void Init() { arrayList = new ArrayList<View>(); // 獲取螢幕寬度 int width = getWindowManager().getDefaultDisplay().getWidth() / title.length; for (int i = 0; i < title.length; i++) { textView = new TextView(this); textView.setText(title[i]); textView.setWidth(width); textView.setHeight(linerlayout_height - 10); textView.setTextSize(20); textView.setTextColor(color.black); textView.setGravity(Gravity.CENTER); textView.setId(i); textView.setPadding(5, 5, 5, 5); textView.setOnClickListener(this); linearLayout.addView(textView); arrayList.add(textView); } pageViews = new ArrayList<View>(); View view00 = getLocalActivityManager().startActivity("activity01", new Intent(this, NullActivity.class)).getDecorView(); View view01 = getLocalActivityManager().startActivity("activity01", new Intent(this, MainActivity1.class)).getDecorView(); View view02 = getLocalActivityManager().startActivity("activity02", new Intent(this, MainActivity2.class)).getDecorView(); View view03 = getLocalActivityManager().startActivity("activity02", new Intent(this, MainActivity3.class)).getDecorView(); View view04 = getLocalActivityManager().startActivity("activity01", new Intent(this, NullActivity.class)).getDecorView(); pageViews.add(view00); pageViews.add(view01); pageViews.add(view02); pageViews.add(view03); pageViews.add(view04); } void Init_Point() { imageViews = new ArrayList<ImageView>(); ImageView imageView; for (int i = 0; i < pageViews.size(); i++) { imageView = new ImageView(this); imageView.setLayoutParams(new LayoutParams(5, 5)); imageView.setBackgroundResource(R.drawable.d1); LinearLayout.LayoutParams layoutParams = new LinearLayout.LayoutParams( new ViewGroup.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT)); layoutParams.leftMargin = 20; layoutParams.rightMargin = 20; layout2.addView(imageView, layoutParams); // 第一個和最後一個讓她消失 if (i == 0 || i == pageViews.size() - 1) { imageView.setVisibility(View.GONE); } if (i == 1) { imageView.setBackgroundResource(R.drawable.d2); } imageViews.add(imageView); } } public void draw_Point(int index) { for (int i = 1; i < imageViews.size(); i++) { if (index == i) { imageViews.get(i).setBackgroundResource(R.drawable.d2); } else imageViews.get(i).setBackgroundResource(R.drawable.d1); } } @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setTitle("jjhappyforever..."); setContentView(R.layout.main); pager = (ViewPager) findViewById(R.id.vp_contains); layout2 = (LinearLayout) findViewById(R.id.iv_image); linearLayout = (LinearLayout) findViewById(R.id.mian); // 建立linerlayout的大小 LinearLayout.LayoutParams layoutParams = new LinearLayout.LayoutParams( new ViewGroup.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.FILL_PARENT)); layoutParams.height = linerlayout_height; linearLayout.setLayoutParams(layoutParams); Init(); Init_Point(); pager.setAdapter(new myPagerView()); arrayList.get(0).setBackgroundResource( R.drawable.renren_sdk_pay_repair_btn_down); pager.setCurrentItem(1); pager.setOnPageChangeListener(new OnPageChangeListener() { @Override public void onPageSelected(int arg0) { draw_Point(arg0);// 描繪分頁點，一定要寫在這裡. // Toast.makeText(MainActivity.this, ""+arg0, 1000).show(); // 如果是第一屏或者是最後一屏禁止滑動，其實這裡實現的是如果滑動的是第一屏則跳轉至第二屏，如果是最後一屏則跳轉到倒數第二屏. if (arg0 == imageViews.size() - 1 || arg0 == 0) { if (arg0 == 0) { pager.setCurrentItem(arg0 + 1);// 第二屏 會再次實現該回調方法實現跳轉. imageViews.get(1).setBackgroundResource(R.drawable.d2); } else { pager.setCurrentItem(arg0 - 1);// 倒數第二屏 imageViews.get(arg0 - 1).setBackgroundResource( R.drawable.d2); } } else { //一定要解除安裝else裡面，viewpager挺變態的，寫在外面，（在你在最左邊往左拉的時候會執行兩次，最右邊也是.） setBackgroud(arg0 - 1); Toast.makeText(MainActivity.this, "" + arg0, 1000).show(); } } @Override public void onPageScrolled(int arg0, float arg1, int arg2) { } @Override public void onPageScrollStateChanged(int arg0) { } }); } /*** * 對title 選項卡處理 * @param index */ public void setBackgroud(int index) { for (int i = 0; i < arrayList.size(); i++) { arrayList.get(i).setBackgroundDrawable(new BitmapDrawable()); if (i == index) arrayList.get(index).setBackgroundResource( R.drawable.renren_sdk_pay_repair_btn_down); } } /*** * viewpager 的資料來源 * @author zhangjia * */ class myPagerView extends PagerAdapter { // 顯示數目 @Override public int getCount() { return pageViews.size(); } @Override public boolean isViewFromObject(View arg0, Object arg1) { return arg0 == arg1; } @Override public int getItemPosition(Object object) { // TODO Auto-generated method stub return super.getItemPosition(object); } @Override public void destroyItem(View arg0, int arg1, Object arg2) { // TODO Auto-generated method stub ((ViewPager) arg0).removeView(pageViews.get(arg1)); } /*** * 獲取每一個item， 類於listview中的getview */ @Override public Object instantiateItem(View arg0, int arg1) { ((ViewPager) arg0).addView(pageViews.get(arg1)); return pageViews.get(arg1); } } /*** * 點選事件 */ @Override public void onClick(View v) { switch (v.getId()) { case 0: setBackgroud(0); pager.setCurrentItem(1); break; case 1: setBackgroud(1); pager.setCurrentItem(2); break; case 2: setBackgroud(2); pager.setCurrentItem(3); break; default: break; } } }
樣本示例：
第一屏左垃 第一屏 滑向第二屏
第二屏 第三屏 第三屏右拉（會縮回）