ViewSwitcher用法

本文主要是介绍ViewSwitcher用法，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！

结合了手势识别

码了一上午有点小收获

问题一：gridview不要再添加布局，否则会报错
问题二：要在gridview中再次添加手势识别，否则只能识别一次

Activity代码

package com.phone.hty.myapplication;import android.content.res.TypedArray;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;
import android.view.GestureDetector;
import android.view.LayoutInflater;
import android.view.MotionEvent;
import android.view.View;
import android.widget.GridView;
import android.widget.Toast;
import android.widget.ViewSwitcher;import java.util.ArrayList;public class MainActivity extends AppCompatActivity {public static final int NNMBER_PER_SCREEN = 16;private ArrayList<DataItem> mItems = new ArrayList<DataItem>();private int screenNo = -1;private int screenCount;ViewSwitcher mViewSwitcher;LayoutInflater mInflater;GestureDetector mDetector;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);initData();initLinster();next();}@Overridepublic boolean onTouchEvent(MotionEvent event) {return mDetector.onTouchEvent(event);}public void next() {((GridView) (mViewSwitcher.getNextView())).setAdapter(new MyAdapter(getBaseContext(), mItems, screenNo, screenCount));((GridView) (mViewSwitcher.getNextView())).setOnTouchListener(new View.OnTouchListener() {@Overridepublic boolean onTouch(View v, MotionEvent event) {Log.d("hty","----"+screenNo);return mDetector.onTouchEvent(event);}});}public void previous() {((GridView) (mViewSwitcher.getNextView())).setAdapter(new MyAdapter(getBaseContext(), mItems, screenNo, screenCount));((GridView) (mViewSwitcher.getNextView())).setOnTouchListener(new View.OnTouchListener() {@Overridepublic boolean onTouch(View v, MotionEvent event) {Log.d("hty","----"+screenNo);return mDetector.onTouchEvent(event);}});}private void initLinster() {mDetector = new GestureDetector(this, new GestureDetector.OnGestureListener() {@Overridepublic boolean onDown(MotionEvent e) {return false;}@Overridepublic void onShowPress(MotionEvent e) {}@Overridepublic boolean onSingleTapUp(MotionEvent e) {return false;}@Overridepublic boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX, float distanceY) {return false;}@Overridepublic void onLongPress(MotionEvent e) {}@Overridepublic boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) {if (e1.getRawX() - e2.getRawX() > 10) {if (screenNo < screenCount - 1) {screenNo++;next();mViewSwitcher.showNext();Log.d("hty", "向左划动，下一页"+screenNo);} else {screenNo = -1;Log.d("hty", "已经到达最后，现在冲重新开始");Toast.makeText(getBaseContext(), "已经到达最后，现在冲重新开始",Toast.LENGTH_SHORT).show();}}if (e2.getRawX() - e1.getRawX() > 10) {if (screenNo > 0) {screenNo--;previous();Log.d("hty", "向右划动，上一页" + screenNo);mViewSwitcher.showPrevious();} else{screenNo = 3;Log.d("hty", "已经到达开始，现在冲转到最后"+screenNo);Toast.makeText(getBaseContext(),"现在到达第一个。重新转到最后一瓶",Toast.LENGTH_SHORT).show();}}return true;}});}private void initData() {mInflater = LayoutInflater.from(this);TypedArray typedArray = getResources().obtainTypedArray(R.array.image);int[] ache_iamge = new int[typedArray.length()];for (int i = 0; i < typedArray.length(); i++) {ache_iamge[i] = typedArray.getResourceId(i, 0);}//此步骤待用/*  String[] stringArray = getResources().getStringArray(R.array.desc);String[] ache_desc = new String[stringArray.length];for (int i = 0; i < stringArray.length; i++) {ache_desc[i] = stringArray[i];}*/for (int i = 0; i < 50; i++) {DataItem item = new DataItem(getResources().getStringArray(R.array.desc)[i], ache_iamge[i]);mItems.add(item);}
// 三木运算符第一个是一个boolean值然后是问号true对应的值：然后是flase对应的值screenCount = mItems.size() % NNMBER_PER_SCREEN == 0 ? mItems.size() / NNMBER_PER_SCREEN :mItems.size() / NNMBER_PER_SCREEN + 1;mViewSwitcher = (ViewSwitcher) findViewById(R.id.view_switcher);mViewSwitcher.setFactory(new ViewSwitcher.ViewFactory() {@Overridepublic View makeView() {return mInflater.inflate(R.layout.gridview_layout, null);}});}
}

列表内容

Adapter代码

package com.phone.hty.myapplication;import android.content.Context;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.TextView;import java.util.ArrayList;/*** 作者：司马啸尘* 创建日期：2016/3/26* 描述：*/
public class MyAdapter extends BaseAdapter {Context mContext;ArrayList<DataItem> mItems;private int ScreenNo = -1;private int ScreenCount;private int NUMBER_PER_SCREEN = 16;public MyAdapter(Context context, ArrayList<DataItem> items, int screenNo, int screenCount) {mContext = context;mItems = items;ScreenNo = screenNo;ScreenCount = screenCount;}@Overridepublic int getCount() {if (ScreenNo == ScreenCount - 1 && mItems.size() % NUMBER_PER_SCREEN != 0) {System.out.println("-------------------");return mItems.size() % NUMBER_PER_SCREEN;} elsereturn NUMBER_PER_SCREEN;}@Overridepublic Object getItem(int position) {return null;}@Overridepublic long getItemId(int position) {return 0;}@Overridepublic View getView(int position, View convertView, ViewGroup parent) {viewHolder holder;if (convertView == null) {convertView = View.inflate(mContext, R.layout.grid_view_item, null);holder = new viewHolder();holder.mImageView = (ImageView) convertView.findViewById(R.id.imageView);holder.mTextView = (TextView) convertView.findViewById(R.id.textView);convertView.setTag(holder);} else {holder = (viewHolder) convertView.getTag();}holder.mImageView.setImageResource(mItems.get(position).getImage());holder.mTextView.setText(mItems.get(position).getDesc());return convertView;}
}class viewHolder {public ImageView mImageView;public TextView mTextView;
}