viewpager

利用简单的Textview 和Viewpager实现滑动、点击换页的效果,效果图如下:

行走的那些事   行走的那些事

先上布局文件代码:

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<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@color/white"
android:orientation="vertical" >

<LinearLayout
android:background="@color/red_base"
android:orientation="horizontal"
android:layout_width="match_parent"
android:layout_height="50dp">

</LinearLayout>
<!-- 选项卡 -->

<LinearLayout
android:layout_width="match_parent"
android:layout_height="40dp"
android:background="@color/white"
android:orientation="horizontal"
android:weightSum="5" >

<FrameLayout
android:id="@+id/rim_tab1_fl"
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1"
android:clickable="true"
android:gravity="center" >

<TextView
android:id="@+id/rim_tab1_tv"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:text="全部"
android:textColor="@color/red_base"
android:textSize="16sp" />
</FrameLayout>

<View
android:layout_width="0.5dp"
android:layout_height="match_parent"
android:layout_marginBottom="10dp"
android:layout_marginTop="10dp"
android:background="@color/divider_gray_line" />

<FrameLayout
android:id="@+id/rim_tab2_fl"
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1"
android:clickable="true"
android:gravity="center" >

<TextView
android:id="@+id/rim_tab2_tv"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:text="周边"
android:textColor="@color/text_gray_4"
android:textSize="16sp" />
</FrameLayout>

<View
android:layout_width="0.5dp"
android:layout_height="match_parent"
android:layout_marginBottom="10dp"
android:layout_marginTop="10dp"
android:background="@color/divider_gray_line" />

<FrameLayout
android:id="@+id/rim_tab3_fl"
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1"
android:clickable="true"
android:gravity="center" >

<TextView
android:id="@+id/rim_tab3_tv"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:text="应援"
android:textColor="@color/text_gray_4"
android:textSize="16sp" />
</FrameLayout>

<View
android:layout_width="0.5dp"
android:layout_height="match_parent"
android:layout_marginBottom="10dp"
android:layout_marginTop="10dp"
android:background="@color/divider_gray_line" />

<FrameLayout
android:id="@+id/rim_tab4_fl"
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1"
android:clickable="true"
android:gravity="center" >

<TextView
android:id="@+id/rim_tab4_tv"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:text="话题"
android:textColor="@color/text_gray_4"
android:textSize="16sp" />
</FrameLayout>

<View
android:layout_width="0.5dp"
android:layout_height="match_parent"
android:layout_marginBottom="10dp"
android:layout_marginTop="10dp"
android:background="@color/divider_gray_line" />

<FrameLayout
android:id="@+id/rim_tab5_fl"
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1"
android:clickable="true"
android:gravity="center" >

<TextView
android:id="@+id/rim_tab5_tv"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:text="明星"
android:textColor="@color/text_gray_4"
android:textSize="16sp" />
</FrameLayout>
</LinearLayout>

<LinearLayout
android:layout_width="match_parent"
android:layout_height="3dp"
android:background="@color/white" >

<ImageView
android:id="@+id/rim_cursor"
android:layout_width="80dp"
android:layout_height="3dp"
android:layout_marginTop="0dip"
android:background="@color/title_bar_blue" />
</LinearLayout>

<View
android:layout_width="match_parent"
android:layout_height="0.1dp"
android:background="@color/btn_bg_gray" />
<!-- 选项卡内容显示区域 -->

<View
android:layout_width="match_parent"
android:layout_height="10dp"
android:background="@color/bg_light_gray" />

<android.support.v4.view.ViewPager
android:id="@+id/rim_third_vp"
android:layout_width="match_parent"
android:layout_height="match_parent" />

</LinearLayout>

上面红色指示器的view的初始化

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private int screenWidth;//指示器
private ImageView cursorImg;
private LinearLayout.LayoutParams lp;


private void initViews(){

WindowManager wm = (WindowManager)
getSystemService(Context.WINDOW_SERVICE);

int width = wm.getDefaultDisplay().getWidth();
screenWidth=width/5;
cursorImg = (ImageView) findViewById(R.id.rim_cursor);
lp = (LinearLayout.LayoutParams) cursorImg.getLayoutParams();
lp.width = screenWidth;
cursorImg.setLayoutParams(lp);
leftMargin = lp.leftMargin;
}

初始化indicater

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private void initViewPager() {
viewPager = (ViewPager) findViewById(R.id.rim_third_vp);
fragmentsList = new ArrayList<Fragment>();
fragment1 = new RimFragment();
fragmentsList.add(fragment1);
fragmentsList.add(fragment2);
fragmentsList.add(fragment3);
fragmentsList.add(fragment4);
fragmentsList.add(fragment5);

viewPager.setAdapter(new FragmentAdapter(getSupportFragmentManager(),
fragmentsList));
viewPager.setCurrentItem(0);
viewPager.setOnPageChangeListener(this);
}

设置上面选项卡的点击事件

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@Override
public void onClick(View v) {
switch (v.getId()){
case R.id.rim_tab1_fl:
viewPager.setCurrentItem(0);
num_tab1_tv.setTextColor(getResources().getColor(R.color.red_base));
num_tab2_tv.setTextColor(getResources().getColor(R.color.text_gray_4));
num_tab3_tv.setTextColor(getResources().getColor(R.color.text_gray_4));
num_tab4_tv.setTextColor(getResources().getColor(R.color.text_gray_4));
num_tab5_tv.setTextColor(getResources().getColor(R.color.text_gray_4));
fragment1.setMsgName("1","周边");//周边的官方和会员的接口参数,官方
break;

设置viewpager 滑动事件

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@Override
public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {

offset = (screenWidth - cursorImg.getLayoutParams().width) / 5;

hidePoint(position, positionOffsetPixels);//设置红色指示器的位置
cursorImg.setLayoutParams(lp);
currentIndex = position;
}

@Override
public void onPageSelected(int position) {

switch (position){//设置点击事件
case 0:
fragment1.setMsgName("1","周边");
num_tab1_tv.setTextColor(getResources().getColor(R.color.red_base));
num_tab2_tv.setTextColor(getResources().getColor(R.color.text_gray_4));
num_tab3_tv.setTextColor(getResources().getColor(R.color.text_gray_4));
num_tab4_tv.setTextColor(getResources().getColor(R.color.text_gray_4));
num_tab5_tv.setTextColor(getResources().getColor(R.color.text_gray_4));
break;


}

if (position==0)
{


}else {

}

}

@Override
public void onPageScrollStateChanged(int state) {

}

//设置指示器的位置
private void hidePoint(int position, int positionOffsetPixels) {
if (position == 0) {// 0<->1
lp.leftMargin = (int) (positionOffsetPixels / 5) + offset;

} else if (position == 1) {// 1<->2
lp.leftMargin = (int) (positionOffsetPixels / 5) + screenWidth
+ offset;

}else if(position==2){
lp.leftMargin = (int) (positionOffsetPixels / 5) + screenWidth*2
+ offset;
}
else if(position==3){
lp.leftMargin = (int) (positionOffsetPixels / 5) + screenWidth*3
+ offset;
}
else if(position==4){
lp.leftMargin = (int) (positionOffsetPixels / 5) + screenWidth*4
+ offset;
}
}

代码并不难,希望通过我这个例子,一是巩固自己的学习和理解,二是希望更多的人更好的学习,我会再接再厉,写更多的博文。

源码下载

请我吃🍗