tablayoutdemo
布局:
<LinearLayout xmlns:android=""
xmlns:tools=""
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<HorizontalScrollView
android:id="@+id/hsv"
android:layout_width="wrap_content"
android:layout_height="wrap_content" >
<LinearLayout
android:id="@+id/ll_head"
android:orientation="horizontal"
android:layout_width="wrap_content"
android:layout_height="wrap_content" >
</LinearLayout>
</HorizontalScrollView>
<android.support.v4.view.ViewPager
android:id="@+id/viewpager"
android:layout_width="wrap_content"
android:layout_height="wrap_content" >
</android.support.v4.view.ViewPager>
</LinearLayout>
fragment 布局:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android=""
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<TextView
android:id="@+id/tv_item"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="center"
android:text="Fragment0"
android:textSize="30sp" />
</LinearLayout>
主类:
package com.wzq.scrollviewindicater;
import android.graphics.Color;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentActivity;
import android.support.v4.app.FragmentPagerAdapter;
import android.support.v4.view.ViewPager;
import android.support.v4.view.ViewPager.OnPageChangeListener;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.HorizontalScrollView;
import android.widget.LinearLayout;
import android.widget.LinearLayout.LayoutParams;
import android.widget.TextView;
import com.wzq.scrollviewindicater.fragment.Fragment0;
import java.util.ArrayList;
public class MainActivity extends FragmentActivity implements OnClickListener {
private LinearLayout ll_head;
private ViewPager viewPager;
private String[] titles;
private ArrayList<TextView> textViewList;
private HorizontalScrollView horizontalScrollView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
ll_head = (LinearLayout) findViewById(R.id.ll_head);
horizontalScrollView = (HorizontalScrollView) findViewById(R.id.hsv);
viewPager = (ViewPager) findViewById(R.id.viewpager);
titles = new String[] { "头条", "娱乐", "科技", "信息", "八卦", "北京", "上海", "天津",
"重庆", "大大燕网" };
textViewList = new ArrayList<TextView>();
// dp转成px 工具类
for (int i = 0; i < titles.length; i++) {
TextView textView = new TextView(this);
textView.setText(titles[i]);
// textView.setWidth(100);
textView.setTextSize(20);
if (i == 0) {
textView.setTextColor(Color.RED);
} else {
textView.setTextColor(Color.BLACK);
}
// 顺便点击事件
textView.setOnClickListener(this);
// 定义id
textView.setId(i + 10000);
LayoutParams params = new LayoutParams(LayoutParams.WRAP_CONTENT,
LayoutParams.WRAP_CONTENT);
params.setMargins(20, 10, 20, 10);
ll_head.addView(textView, params);
// 往集合中添加textView
textViewList.add(textView);
}
viewPager.setAdapter(new FragmentPagerAdapter(
getSupportFragmentManager()) {
@Override
public int getCount() {
return titles.length;
}
@Override
public Fragment getItem(int position) {
return Fragment0.getInstance(titles[position]);
}
});
viewPager.setOnPageChangeListener(new OnPageChangeListener() {
@Override
public void onPageSelected(int position) {
for (int i = 0; i < textViewList.size(); i++) {
if (position == i) {
textViewList.get(i).setTextColor(Color.RED);
} else {
textViewList.get(i).setTextColor(Color.BLACK);
}
}
TextView textView = textViewList.get(position);
int width = textView.getWidth();
// 计算该滑到什么位置
horizontalScrollView.scrollTo((width + 20) * position, 0);
}
@Override
public void onPageScrolled(int arg0, float arg1, int arg2) {
}
@Override
public void onPageScrollStateChanged(int arg0) {
}
});
}
@Override
public void onClick(View v) {
int id = v.getId();
viewPager.setCurrentItem(id - 10000);
}
}
fragment 类:
package com.wzq.scrollviewindicater.fragment;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;
public class BaseFragment extends Fragment {
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
Bundle arguments = getArguments();
String args = (String) arguments.get("args");
TextView textView = new TextView(getActivity());
textView.setText(args);
return textView;
}
}
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