在scrollview里放gridview冲突问题心得

来源：互联网发布：粒子群优化算法 java 编辑：程序博客网时间：2024/06/05 09:35

被要求让做出一个App界面，在整体设好了之后主界面的布局文件底部原先是有个GridView的，整体套上ScrollView后，在手机上的gridview区域只能显示一行多一点（假设放了十几张图片），想不明白只能上网搜例子，然后结合着一个一个自己调，终于出来了。

先写个类继承gridview，这个类是用来替换主界面布局文件的<GridView></>组件的

package xxx;

import android.content.Context;
import android.util.AttributeSet;
import android.widget.GridView;

/**
* @author Administrator
* 开发中用到了需要ScrollView嵌套GridView的情况，
* 由于这两款控件都自带滚动条，当他们碰到一起的时候便会出问题即GridView会显示不全.
* 该自定义控件只是重写了GridView的onMeasure方法
* ，使其不会出现滚动条，ScrollView嵌套ListView也是同样的道理
*
*/
public class MyGridView extends GridView {

public MyGridView(Context context) {
super(context);
// TODO Auto-generated constructor stub
}

public MyGridView(Context context, AttributeSet attrs) {
super(context, attrs);
// TODO Auto-generated constructor stub
}

public MyGridView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
// TODO Auto-generated constructor stub
}

@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
// TODO Auto-generated method stub
int expandSpec = MeasureSpec.makeMeasureSpec(Integer.MAX_VALUE>>2,
MeasureSpec.AT_MOST);

super.onMeasure(widthMeasureSpec, expandSpec);
}
}

-------------------------------------------------------

然后到你的主界面布局文件，找到那个<GridView>位置，换成你自己的类，以我的为例

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res/com.dream.myqiyi"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="#ffffff"
android:orientation="vertical" >



<include layout="@layout/title_view" />

<ScrollView
android:id="@+id/center_scroll"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:fillViewport="true"
android:scrollbars="vertical"
>

<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="vertical" >

<FrameLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="vertical" >

<Gallery
android:id="@+id/home_center_gallery"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:spacing="5dip" />

<LinearLayout
android:id="@+id/linearLayout1"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_gravity="bottom"
android:background="#65000000"
android:orientation="vertical" >

<TextView
android:id="@+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:layout_marginBottom="5dip"
android:layout_marginTop="5dip"
android:textColor="#ffffff"
android:textSize="18sp" />

<com.xxx.xxx.FlowIndicator
android:id="@+id/center_myView"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="5dip"
android:gravity="center"
app:count="4"
app:point_normal_color="#ffffff"
app:point_radius="4dip"
app:point_seleted_color="#1087f6"
app:point_size="5dip"
app:space="10dip" />
</LinearLayout>
</FrameLayout>

<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:background="#ffffff" >

<GridView
android:id="@+id/home_grid_center"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:cacheColorHint="#00000000"
android:clipToPadding="true"
android:columnWidth="70dp"
android:gravity="center"
android:horizontalSpacing="10dp"
android:listSelector="#00000000"
android:numColumns="3"
android:paddingBottom="20dp"
android:paddingTop="20dp"
android:stretchMode="columnWidth"
android:verticalSpacing="10dp" />
</LinearLayout>

<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:background="#ffffff"
android:orientation="vertical" >

<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_marginLeft="10dp"
android:text="最新课程"
android:textColor="@color/black"
android:textSize="20sp" />

<com.xxx.xxx.MyGridView
android:id="@+id/grid_footer"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_margin="5dp"
android:cacheColorHint="#00000000"
android:clipToPadding="true"
android:horizontalSpacing="5dp"
android:listSelector="#00000000"
android:numColumns="2"
android:stretchMode="columnWidth"
android:verticalSpacing="5dp" >
</com.xxx.xxx.MyGridView>
</LinearLayout>
</LinearLayout>
</ScrollView>

</LinearLayout>

------------------------------------------------------------------

然后就是自己的主界面的类了。这里我用的是自定义gridview方式

·············

/* 加载整体布局底部的gridview */
public void initiaLessonGridview() {

mGridView = (GridView) findViewById(R.id.grid_footer);
NewLessonAdapter newlessonAdapter = new NewLessonAdapter(this,
classExplain, techer, images);
mGridView.setAdapter(newlessonAdapter);
mGridView.setOnItemClickListener(new OnItemClickListener() {

@Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
// TODO Auto-generated method stub
Toast.makeText(HomeActivity.this, "item" + (position + 1),
Toast.LENGTH_SHORT).show();
}
});
}

NewLessonAdapter 类：

package com.xxx;

import java.util.ArrayList;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;
import java.util.Timer;

import com.dream.myqiyi.R;
import com.geeker.json.Course;
import com.geeker.widget.FlowIndicator;

import android.app.Activity;
import android.content.Context;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.Gallery;
import android.widget.GridView;
import android.widget.ImageButton;
import android.widget.ImageView;
import android.widget.SimpleAdapter;
import android.widget.TextView;

/**
* @author Administrator 最新课程
*
* 这里做griditem的适配。
*/
public class NewLessonAdapter extends BaseAdapter {

private LayoutInflater mInflater;
private Context mContext;
private List<Course> mCourse;

static class ViewHolder {
private ImageView lessonImage;
private TextView explain;
private TextView teacher;
}

public NewLessonAdapter(Context context){
this.mContext = context;
}

public NewLessonAdapter(Context context, String[] lessonName,
String[] perName, int[] imgId) {
super();
mCourse = new ArrayList<Course>();
mInflater = LayoutInflater.from(context);
for (int i = 0; i < imgId.length; i++) {
Course c = new Course(imgId[i], lessonName[i], perName[i]);
mCourse.add(c);
}
}

@Override
public int getCount() {
// TODO Auto-generated method stub
if (null != mCourse) {
return mCourse.size();
} else {
return 0;
}
}

@Override
public Object getItem(int position) {
// TODO Auto-generated method stub
return mCourse.get(position);
}

@Override
public long getItemId(int position) {
// TODO Auto-generated method stub
return position;
}

@Override
public View getView(int position, View view, ViewGroup viewGroup) {
// TODO Auto-generated method stub
// notifyDataSetChanged();
ViewHolder mViewHolder;
if (view == null) {
view = mInflater.inflate(R.layout.new_course_griditem, null);
mViewHolder = new ViewHolder();
mViewHolder.lessonImage = (ImageView) view
.findViewById(R.id.img_lesson);
mViewHolder.explain = (TextView) view
.findViewById(R.id.className_lesson);
mViewHolder.teacher = (TextView) view.findViewById(R.id.techer);
view.setTag(mViewHolder);
} else {
mViewHolder = (ViewHolder) view.getTag();
}
mViewHolder.lessonImage.setImageResource(mCourse.get(position)
.getLessonIcon());
mViewHolder.explain.setText(mCourse.get(position).getLessonState());
mViewHolder.teacher.setText(mCourse.get(position).getSpeakerName());
return view;
}

}

预览效果：

如果需要更多参考http://www.360doc.com/content/12/0525/19/5087210_213693392.shtml 【http://www.myexception.cn/mobile/1489020.html】【http://bbs.csdn.net/topics/370110067】

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