android 中 ViewPager 的平常用法 ViewPager+ Views-白红宇

android 中 ViewPager 的平常用法 ViewPager+ Views

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发布时间：2019-06-13

本文共 4496 字，大约阅读时间需要 14 分钟。

延续前面几个的经常用到的ViewPager，直接加载各种不同的 View

工程目录：

代码：

public class ViewActivity extends Activity {	// 每个View的图片	private int[] images = { R.drawable.guide_1,R.drawable.guide_3, 			R.drawable.guide_5,  R.drawable.guide_6, R.drawable.guide_7 };	//所有的View			private List
    
      list_views = new ArrayList
     
      ();		private ViewPager pager;	private ImageView start;      	private ImageView curDot;		private LinearLayout  linear_all_point; // 指示器图标view	private int offset;              // 位移量		private int nowPosition;          // 记录当前的位置	private GuidePagerAdapter adapter;		Handler handler = new Handler() {		@Override		public void handleMessage(Message msg) {			switch (msg.what) {			case 0:				start.setVisibility(View.VISIBLE);				break;            case 1:            	start.setVisibility(View.GONE);				break;			}		}	};		@Override	public void onCreate(Bundle savedInstanceState) {		super.onCreate(savedInstanceState);		requestWindowFeature(Window.FEATURE_NO_TITLE);		setContentView(R.layout.main);		init();	}		private ImageView buildImageView(int id){		ImageView iv = new ImageView(this);		iv.setImageResource(id);		ViewGroup.LayoutParams params = new ViewGroup.LayoutParams(				ViewGroup.LayoutParams.FILL_PARENT,				ViewGroup.LayoutParams.FILL_PARENT);		iv.setLayoutParams(params);		iv.setScaleType(ScaleType.FIT_XY);		return iv;	}				//功能介绍界面的初始化	private void init(){				{			linear_all_point = (LinearLayout)this.findViewById(R.id.dot_contain);			pager = (ViewPager) findViewById(R.id.contentPager);			curDot = (ImageView) findViewById(R.id.cur_dot);			start = (ImageView) findViewById(R.id.open);		}						{ //初始化点 每个底部小点的指示器哦。 			for(int i=0; i< images.length; i++){				ImageView dotView = new ImageView(this);				dotView.setImageResource(R.drawable.dot1_w);				dotView.setLayoutParams(new LinearLayout.LayoutParams(						ViewGroup.LayoutParams.WRAP_CONTENT,						ViewGroup.LayoutParams.WRAP_CONTENT,1.0f));				linear_all_point.addView(dotView);			}		}					ImageView imageView;			//现在的viewpager我往里面塞的是图片，这里你也可以初始化你自己的xml			for (int i = 0; i < images.length; i++) {				imageView = buildImageView(images[i]);				list_views.add(imageView);			}		    //当curDot的所在的树形层次将要被绘出时此方法被调用		    curDot.getViewTreeObserver().addOnPreDrawListener(				new OnPreDrawListener() {					public boolean onPreDraw() {						// 获取ImageView的宽度也就是点图片的宽度						offset = curDot.getWidth();						return true;					}			});		    		    adapter = new GuidePagerAdapter(list_views);			// ViewPager设置数据适配器，这个类似于使用ListView时用的adapter			pager.setAdapter(adapter);			pager.clearAnimation();			// 为Viewpager添加事件监听器 OnPageChangeListener			pager.setOnPageChangeListener(new ViewPager.SimpleOnPageChangeListener(){				@Override				public void onPageSelected(int position){					//移动下面的小点指示器					moveCursorTo(position);					if (position == images.length-1) {// 到最后一张了											handler.sendEmptyMessageDelayed(0, 500);																} else if (nowPosition == images.length - 1) {						handler.sendEmptyMessageDelayed(1, 100);					}										nowPosition = position;					super.onPageSelected(position);				}			});	}		//指示器	private void moveCursorTo(int position) {		AnimationSet animationSet = new AnimationSet(true);		TranslateAnimation tAnim = new TranslateAnimation(offset* nowPosition, offset * position, 0, 0);		animationSet.addAnimation(tAnim);		animationSet.setDuration(10);		animationSet.setFillAfter(true);		curDot.startAnimation(animationSet);	}	// ViewPager 适配器	class GuidePagerAdapter extends PagerAdapter{		private List
      
        views;		public GuidePagerAdapter(List
       
         views){			this.views=views;		}		@Override		public void destroyItem(View arg0, int position, Object arg2) {			((ViewPager) arg0).removeView(views.get(position));		}		@Override		public void finishUpdate(View arg0) {		}		@Override		public int getCount() {			return views.size();		}		@Override		public Object instantiateItem(View arg0, int position) {			((ViewPager) arg0).addView(views.get(position),0);			return views.get(position );		}		@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){						}	}	}