一個簡單圖檔滾動view
滾動圖檔類:ImageAutoScroll
<pre name="code" class="java">
import java.util.ArrayList;
import java.util.List;
import java.util.Timer;
import java.util.TimerTask;
import android.animation.ArgbEvaluator;
import android.content.Context;
import android.os.AsyncTask;
import android.os.Handler;
import android.os.Message;
import android.support.v4.view.PagerAdapter;
import android.support.v4.view.ViewPager;
import android.util.AttributeSet;
import android.util.Log;
import android.util.TypedValue;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.RelativeLayout;
import android.widget.TextView;
public class ImageAutoScroll extends RelativeLayout{
private Context mContext;
private ViewPager mViewPager;
private LinearLayout mTabs;
private List<ImageView> imageViewsUser;
private List<ImageView> mImageViews;
private List<TextView> tabs;
private int size;
private int oldPostion;
private int currentPostion;
private boolean isStop;
private Handler handler;
ImageView imageFrist;
ImageView imageEnd;
int dotSize;
public ImageAutoScroll(Context context) {
super(context);
}
public ImageAutoScroll(Context context, AttributeSet attrs) {
super(context, attrs);
mContext = context;
initView();
initListening();
}
private void initView() {
dotSize = (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 10,
mContext.getResources().getDisplayMetrics());
mViewPager = new ViewPager(mContext);
LayoutParams layoutParams = new LayoutParams(LayoutParams.MATCH_PARENT,
LayoutParams.MATCH_PARENT);
mViewPager.setLayoutParams(layoutParams);
mTabs = new LinearLayout(mContext);
layoutParams = new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
layoutParams.addRule(RelativeLayout.ALIGN_PARENT_BOTTOM);
layoutParams.addRule(RelativeLayout.ALIGN_PARENT_RIGHT);
layoutParams.bottomMargin = dotSize;
layoutParams.rightMargin = dotSize;
mTabs.setLayoutParams(layoutParams);
addView(mViewPager);
addView(mTabs);
}
public void setDate(List<ImageView> imageViews) {
this.imageViewsUser = imageViews;
if (imageViews == null || imageViews.size() < 1)
throw new IllegalArgumentException("參數為空或長度為零");
mImageViews = new ArrayList<ImageView>();
tabs = new ArrayList<TextView>();
size = imageViews.size();
handler = new Handler() {
@Override
public void handleMessage(Message msg) {
switch (msg.what) {
case 0:
mViewPager.setCurrentItem(size, false);
break;
case 1:
mViewPager.setCurrentItem(1, false);
break;
case 888:
imageFrist.setBackgroundDrawable(imageViewsUser.get(size - 1).getDrawable());
imageFrist.invalidate();
Log.i("hu", "888");
if (imageFrist.getBackground() == null)
handler.sendEmptyMessageDelayed(888, 1000);
break;
case 999:
imageEnd.setBackgroundDrawable(imageViewsUser.get(0).getDrawable());
Log.i("hu", "999");
imageEnd.invalidate();
if (imageEnd.getBackground() == null)
handler.sendEmptyMessageDelayed(999, 1000);
break;
}
}
};
if (size == 1) {
mImageViews.add(imageViews.get(0));
return;
}
for (int i = 0; i < size + 2; i++) {
if (i == 0) {
imageFrist = new ImageView(mContext);
if (imageViewsUser.get(size - 1).getBackground() != null) {
imageFrist.setBackgroundDrawable(imageViewsUser.get(size - 1).getBackground());
} else {
handler.sendEmptyMessageDelayed(888, 1000);
}
mImageViews.add(imageFrist);
} else if (i == size + 1) {
imageEnd = new ImageView(mContext);
if (imageViewsUser.get(0).getBackground() != null) {
imageEnd.setBackgroundDrawable(imageViewsUser.get(0).getBackground());
} else {
handler.sendEmptyMessageDelayed(999, 1000);
}
mImageViews.add(imageEnd);
} else {
mImageViews.add(imageViewsUser.get(i - 1));
}
mImageViews.get(i).setScaleType(ImageView.ScaleType.FIT_XY);
}
LinearLayout.LayoutParams layoutParams = new LinearLayout.LayoutParams(dotSize, dotSize);
layoutParams.leftMargin = dotSize/2;
for (int i = 0; i < size; i++) {
TextView textView = new TextView(mContext);
textView.setLayoutParams(layoutParams);
if (i == 0) {
textView.setBackgroundResource(R.drawable.btn_top_pressed);
} else {
textView.setBackgroundResource(R.drawable.dot_normal);
}
tabs.add(textView);
mTabs.addView(textView);
}
mViewPager.setAdapter(new MyAdapter());
if (size > 1) {
mViewPager.setCurrentItem(1);
oldPostion = 0;
new Timer().schedule(new TimerTask() {
@Override
public void run() {
if (!isStop) {
if (currentPostion + 1 > size + 1) {
currentPostion = 1;
}
currentPostion++;
handler.post(new Runnable() {
@Override
public void run() {
new AutoScroll().execute(currentPostion);
}
});
}
}
}, 3000, 3000);
}
}
//是否暫停輪播
public boolean isStop() {
return isStop;
}
public void setIsStop(boolean isStop) {
this.isStop = isStop;
}
private void initListening() {
mViewPager.setOnPageChangeListener(new MyPageChangeListener());
}
class MyPageChangeListener implements ViewPager.OnPageChangeListener {
@Override
public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
}
@Override
public void onPageSelected(int position) {
currentPostion = position;
tabs.get(oldPostion).setBackgroundResource(R.drawable.dot_normal);
if (position == 0) {
handler.sendEmptyMessageDelayed(0, 300);
tabs.get(size - 1).setBackgroundResource(R.drawable.btn_top_pressed);
oldPostion = size - 1;
} else if (position == size + 1) {
handler.sendEmptyMessageDelayed(1, 300);
tabs.get(0).setBackgroundResource(R.drawable.btn_top_pressed);
oldPostion = 0;
} else {
tabs.get(currentPostion - 1).setBackgroundResource(R.drawable.btn_top_pressed);
oldPostion = currentPostion - 1;
}
}
@Override
public void onPageScrollStateChanged(int state) {
}
}
class MyAdapter extends PagerAdapter {
@Override
public int getCount() {
return mImageViews.size();
}
@Override
public Object instantiateItem(ViewGroup container, int position) {
container.addView(mImageViews.get(position));
return mImageViews.get(position);
}
@Override
public boolean isViewFromObject(View view, Object object) {
return view == object;
}
@Override
public void destroyItem(ViewGroup container, int position, Object object) {
container.removeView(mImageViews.get(position));
}
}
class AutoScroll extends AsyncTask<Integer, Integer, Integer> {
@Override
protected Integer doInBackground(Integer... params) {
return params[0];
}
@Override
protected void onPostExecute(Integer integer) {
mViewPager.setCurrentItem(integer, true);
}
}
}
這個類是圖檔滾動的view 直接在 xml裡面引用即可
下面是2個下标背景
btn_top_pressed.xml
<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
android:shape="oval" >
<stroke
android:color="#33000000"
android:width="2dp"
>
</stroke>
<solid android:color="@android:color/white"
/>
<corners android:radius="5dip" />
</shape>
dot_normal.xml
<pre name="code" class="html"><?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
android:shape="oval" >
<stroke android:width="1dp"
android:color="#aaFFFFFF"
>
</stroke>
<solid android:color="#33000000" />
<corners android:radius="5dip" />
</shape>
ok 這上面是 要引用該類 必須需要的
下面是引用該類的執行個體
首先在layout 檔案中引用該類
activity_main.xml
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent"
android:layout_height="match_parent" android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
android:paddingBottom="@dimen/activity_vertical_margin"
tools:context=".MainActivity">
<com.example.administrator.myapplication.ImageAutoScroll
android:id="@+id/my_image_auto_scroll"
android:layout_width="match_parent"
android:layout_height="match_parent">
</com.example.administrator.myapplication.ImageAutoScroll>
</RelativeLayout>
然後再主類裡面 調用 該類的setDate
MainActivity
package com.example.administrator.myapplication;
import android.content.Context;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.ImageView;
import java.util.ArrayList;
public class MainActivity extends AppCompatActivity {
private ArrayList<ImageView> imageViews;
private int[] ids = {R.mipmap.image1, R.mipmap.image2, R.mipmap.image3};
private Context mContext;
private ImageAutoScroll imageAutoScroll;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
initView();
initData();
}
private void initView() {
imageAutoScroll = (ImageAutoScroll) findViewById(R.id.my_image_auto_scroll);
}
private void initData() {
mContext = MainActivity.this;
imageViews = new ArrayList<ImageView>();
for (int i = 0; i < ids.length; i++) {
ImageView imageView = new ImageView(mContext);
imageView.setBackgroundResource(ids[i]);
imageViews.add(imageView);
}
imageAutoScroll.setDate(imageViews);
}
}
以上就是引用該類的方法,
該類的主要方法
setDate(List<ImageView> imageViews) //指定需要滾動的圖檔集合
setIsStop(boolean isStop) 設定true 自動輪播 false停止輪播
ok 以上就是所有的代碼了 , 如果有更好的意見歡迎提出, 一起學習
由于下載下傳代碼未更新,請直接複制上面代碼使用
源碼下載下傳位址: androidStudio源碼
http://download.csdn.net/detail/hu5080126/8945367