android 第一次运行应用的引导界面
16lz
2021-01-23
android 第一次运行应用的引导界面
先看看效果图:
主要代码:
package com.example.introducedemo;import java.util.ArrayList;import android.app.Activity;import android.os.Bundle;import android.os.Parcelable;import android.support.v4.view.PagerAdapter;import android.support.v4.view.ViewPager;import android.support.v4.view.ViewPager.OnPageChangeListener;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup.LayoutParams;import android.view.Window;import android.widget.ImageView;import android.widget.LinearLayout;public class MainActivity extends Activity { private ImageView mImageView; View mView; private ArrayListmPageViews; // 定义LayoutInflater LayoutInflater mInflater; private ViewPager mViewPager; LinearLayout mLinearLayout; private ImageView[] mImageViews; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); // 设置窗口无标题 requestWindowFeature(Window.FEATURE_NO_TITLE); mInflater = getLayoutInflater(); mPageViews = new ArrayList (); mPageViews.add(mInflater.inflate(R.layout.view_01, null)); mPageViews.add(mInflater.inflate(R.layout.view_02, null)); mPageViews.add(mInflater.inflate(R.layout.view_03, null)); mImageViews = new ImageView[mPageViews.size()]; mView = mInflater.inflate(R.layout.activity_main, null); mViewPager = (ViewPager) mView.findViewById(R.id.myviewpager); mLinearLayout = (LinearLayout) mView .findViewById(R.id.mybottomviewgroup); for (int i = 0; i < mImageViews.length; i++) { mImageView = new ImageView(MainActivity.this); mImageView.setLayoutParams(new LayoutParams(10, 10)); LinearLayout.LayoutParams lp = new LinearLayout.LayoutParams( LinearLayout.LayoutParams.WRAP_CONTENT, LinearLayout.LayoutParams.WRAP_CONTENT); lp.setMargins(10, 0, 10, 0); mImageView.setLayoutParams(lp); if (i == 0) { mImageView.setBackgroundResource(R.drawable.page_indicator_focused); } else { mImageView .setBackgroundResource(R.drawable.page_indicator_unfocused); } mImageViews[i] = mImageView; // 把指示作用的远点图片加入底部的视图中 mLinearLayout.addView(mImageViews[i]); } setContentView(mView); mViewPager.setAdapter(new MyPagerAdapter()); mViewPager.setOnPageChangeListener(new OnPageChangeListener() { public void onPageSelected(int arg0) { for (int i = 0; i < mImageViews.length; i++) { if (i == arg0) { mImageViews[i] .setBackgroundResource(R.drawable.page_indicator_focused); } else { mImageViews[i] .setBackgroundResource(R.drawable.page_indicator_unfocused); } } } @Override public void onPageScrolled(int arg0, float arg1, int arg2) { // TODO Auto-generated method stub } @Override public void onPageScrollStateChanged(int arg0) { // TODO Auto-generated method stub } }); } class MyPagerAdapter extends PagerAdapter { @Override public int getCount() { return mPageViews.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(mPageViews.get(arg1)); } @Override public Object instantiateItem(View arg0, int arg1) { // TODO Auto-generated method stub ((ViewPager) arg0).addView(mPageViews.get(arg1)); return mPageViews.get(arg1); } @Override public void restoreState(Parcelable arg0, ClassLoader arg1) { // TODO Auto-generated method stub } @Override public Parcelable saveState() { // TODO Auto-generated method stub return null; } @Override public void startUpdate(View arg0) { // TODO Auto-generated method stub } @Override public void finishUpdate(View arg0) { // TODO Auto-generated method stub } }}
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