android 禁止ViewPager滑動

標籤：

最近項目中,有個需求就是要禁止ViewPager滑動事件,我們看下360手機小幫手的介面,風格就類似這樣的

大家如果使用過360手機小幫手就會發現中間內容是不可以滑動的,現在寫一個demo,講下怎麼禁止ViewPager事件的滑動

布局檔案

<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"
    >
    <com.example.viewpagears.ui.MyViewPager
        android:id="@+id/viewpager"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
         />
</RelativeLayout>

自訂ViewPager類

public class MyViewPager extends ViewPager {
private static final String TAG = "MyViewPager";
private boolean result = false;
public MyViewPager(Context context, AttributeSet attrs) {
super(context, attrs);
}
public MyViewPager(Context context) {
super(context);
}
@Override
public boolean onInterceptTouchEvent(MotionEvent arg0) {
if(result)
      return super.onInterceptTouchEvent(arg0);
else
return false;
}
@Override
public boolean onTouchEvent(MotionEvent arg0) {
if(result)
return super.onTouchEvent(arg0);
else
return false;
}
}

MainActivity.java

package com.example.viewpagears;


import java.util.ArrayList;
import java.util.List;


import android.app.Activity;
import android.os.Bundle;
import android.support.v4.view.PagerAdapter;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.Toast;


import com.example.viewpagears.ui.MyViewPager;


public class MainActivity extends Activity {
private MyViewPager viewpager;
private List<ImageView> views;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
initData();
viewpager = (MyViewPager) findViewById(R.id.viewpager);
MyAdapter adapter  = new MyAdapter();
viewpager.setAdapter(adapter);
}
private void initData() {
views = new ArrayList<ImageView>();
for(int i=0;i<6;i++){
ImageView iv = new ImageView(this);
iv.setImageResource(R.drawable.ic_launcher);
iv.setOnClickListener(new OnClickListener() {

@Override
public void onClick(View v) {
Toast.makeText(getApplicationContext(), "被點擊了", 0).show();
}
});
views.add(iv);
}
}
class MyAdapter extends PagerAdapter{


@Override
public int getCount() {
// TODO Auto-generated method stub
return views.size();
}


@Override
public boolean isViewFromObject(View arg0, Object arg1) {
// TODO Auto-generated method stub
return arg0==arg1;
}


@Override
public void destroyItem(ViewGroup container, int position, Object object) {
container.removeView(views.get(position));
}


@Override
public Object instantiateItem(ViewGroup container, int position) {
// TODO Auto-generated method stub
container.addView(views.get(position));
return views.get(position);
}

}
}

其實我們在自訂Viewpager其實很簡單就是重寫了2個方法：onInterceptTouchEvent(),onTouchEvent()

onInterceptTouchEvent()表示攔截touch事件

onTouchEvent()觸摸事件

在android中onTouchEvent預設是return true表示可以觸摸,大家可以通過源碼去看下,在這裡就不講了,onInterceptTouchEvent()不能返回true,如果return true子view什麼事件都被攔截了,Viewpager對這個方法進行了一些重寫,可以去看看他的源碼,

android 禁止ViewPager滑動