android之GridView和Gallery-白红宇

android之GridView和Gallery

阅读量：7105 次

发布时间：2019-06-28

本文共 11200 字，大约阅读时间需要 37 分钟。

GridView：

/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">

<GridView

android:id="@+id/gvGenerals"

android:layout_width="match_parent"

android:layout_height="match_parent"

android:columnWidth="60dp"

android:horizontalSpacing="2dp"

android:verticalSpacing="20dp"

android:numColumns="auto_fit"

</RelativeLayout>

java代码：

package com.example.day05_01;

import java.util.ArrayList;

import java.util.List;

import com.litsoft.entity.General;

import android.support.v7.app.ActionBarActivity;

import android.app.Activity;

import android.os.Bundle;

import android.view.Menu;

import android.view.MenuItem;

import android.view.View;

import android.view.ViewGroup;

import android.widget.AdapterView;

import android.widget.AdapterView.OnItemClickListener;

import android.widget.AdapterView.OnItemLongClickListener;

import android.widget.BaseAdapter;

import android.widget.GridView;

import android.widget.ImageView;

import android.widget.ListView;

import android.widget.TextView;

import android.widget.Toast;

public class MainActivity extends Activity {

private List<General> generals;//要显示的数据集合

private GridView gvGenerals;//GridView对象

private BaseAdapter generalAdapt;//适配器

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

init();//初始化要显示的数据集合、ListView对象、以及适配器

setListener();//设置按item事件

}

private void setListener() {

// TODO Auto-generated method stub

//短按事件监听

gvGenerals.setOnItemClickListener(new OnItemClickListener() {

@Override

public void onItemClick(AdapterView<?> parent, View view,

int position, long id) {

// TODO Auto-generated method stub

Toast.makeText(MainActivity.this, generals.get(position).getName()+":被短按 ", 50000).show();

}

});

//长按事件监听

gvGenerals.setOnItemLongClickListener(new OnItemLongClickListener() {

@Override

public boolean onItemLongClick(AdapterView<?> parent, View view,

int position, long id) {

// TODO Auto-generated method stub

Toast.makeText(MainActivity.this, generals.get(position).getName()+":被长按 ", 50000).show();

return true;//1、如果返回false，长按后，他也会触发短按事件2、如果返回true的话，长按后就不会触发短按事件

}

});

}

private void init() {

// TODO Auto-generated method stub

//初始化要显示的数据集合---start

generals = new ArrayList<General>();

//图片资源集合

int[] resImags = {

R.drawable.baiqi,R.drawable.caocao,R.drawable.chengjisihan,

R.drawable.hanxin,R.drawable.lishimin,R.drawable.nuerhachi,

R.drawable.sunbin,R.drawable.sunwu,R.drawable.yuefei,

R.drawable.zhuyuanzhang

};

//将资源中的字符串组数转换为Java数组

String [] names = getResources().getStringArray(R.array.generals);

for (int i =0;i<resImags.length;i++){

General general = new General(resImags[i],names[i]);

generals.add(general);

}

//初始化要显示的数据集合---end

//初始化listView

gvGenerals = (GridView) findViewById(R.id.gvGenerals);

//初始化适配器以及设置该listView的适配器

generalAdapt = new GeneralAdapter();

gvGenerals.setAdapter(generalAdapt);

}

class GeneralAdapter extends BaseAdapter {

//得到listView中item的总数

@Override

public int getCount() {

// TODO Auto-generated method stub

return generals.size();

}

@Override

public General getItem(int position) {

// TODO Auto-generated method stub

return generals.get(position);

}

@Override

public long getItemId(int position) {

// TODO Auto-generated method stub

return position;

}

//简单来说就是拿到单行的一个布局，然后根据不同的数值，填充主要的listView的每一个item

@Override

public View getView(int position, View convertView, ViewGroup parent) {

// TODO Auto-generated method stub

//拿到ListViewItem的布局，转换为View类型的对象

View layout = View.inflate(MainActivity.this, R.layout.activity_item_generals_, null);

//找到显示军事家头像的ImageView

ImageView ivThumb = (ImageView) layout.findViewById(R.id.ivThumb);

//找到显示军事家名字的TextView

TextView tvName = (TextView) layout.findViewById(R.id.tvName);

//获取军事中下标是position的军事家对象

General general = generals.get(position);

//显示军事家头像

ivThumb.setImageResource(general.getImageSrc());

//显示军事家的姓名

tvName.setText(general.getName());

return layout;

}

适配布局页面：layout\activity_item_generals_.xml

<LinearLayout 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:orientation="vertical">

<ImageView

android:id="@+id/ivThumb"

android:layout_width="80dp"

android:layout_height="80dp"

android:src="@drawable/baiqi"/>

<TextView

android:id="@+id/tvName"

android:layout_width="wrap_content"

android:layout_height="80dp"

android:text="白起"

android:textSize="20sp"

android:gravity="center_horizontal"

</LinearLayout>

strings.xml文件

<?xml version="1.0" encoding="utf-8"?>

<string name="hello_world">Hello world!</string>

<string name="action_settings">Settings</string>

<string name="title_activity_item_generals_">ItemGenerals_Activity</string>

<string-array name="generals">

</string-array>

</resources>

将军资源java对象：

package com.litsoft.entity;

public class General {

private int p_w_picpathSrc;

private String name;

public int getImageSrc() {

return p_w_picpathSrc;

}

public void setImageSrc(int p_w_picpathSrc) {

this.p_w_picpathSrc = p_w_picpathSrc;

}

public String getName() {

return name;

}

public void setName(String name) {

this.name = name;

}

public General(int p_w_picpathSrc, String name) {

super();

this.p_w_picpathSrc = p_w_picpathSrc;

this.name = name;

}

效果：

Gallery：

/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">

<Gallery

android:id="@+id/gvGenerals"

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:spacing="2dp"

</RelativeLayout>

java代码：

package com.example.day05_01;

import java.util.ArrayList;

import java.util.List;

import com.litsoft.entity.General;

import android.support.v7.app.ActionBarActivity;

import android.app.Activity;

import android.os.Bundle;

import android.view.Menu;

import android.view.MenuItem;

import android.view.View;

import android.view.ViewGroup;

import android.widget.AdapterView;

import android.widget.AdapterView.OnItemClickListener;

import android.widget.AdapterView.OnItemLongClickListener;

import android.widget.BaseAdapter;

import android.widget.Gallery;

import android.widget.GridView;

import android.widget.ImageView;

import android.widget.ListView;

import android.widget.TextView;

import android.widget.Toast;

public class MainActivity extends Activity {

private List<General> generals;//要显示的数据集合

private Gallery gvGenerals;//GridView对象

private BaseAdapter generalAdapt;//适配器

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

init();//初始化要显示的数据集合、ListView对象、以及适配器

setListener();//设置按item事件

}

private void setListener() {

// TODO Auto-generated method stub

//短按事件监听

gvGenerals.setOnItemClickListener(new OnItemClickListener() {

@Override

public void onItemClick(AdapterView<?> parent, View view,

int position, long id) {

// TODO Auto-generated method stub

Toast.makeText(MainActivity.this, generals.get(position).getName()+":被短按 ", 50000).show();

}

});

//长按事件监听

gvGenerals.setOnItemLongClickListener(new OnItemLongClickListener() {

@Override

public boolean onItemLongClick(AdapterView<?> parent, View view,

int position, long id) {

// TODO Auto-generated method stub

Toast.makeText(MainActivity.this, generals.get(position).getName()+":被长按 ", 50000).show();

return true;//1、如果返回false，长按后，他也会触发短按事件2、如果返回true的话，长按后就不会触发短按事件

}

});

}

private void init() {

// TODO Auto-generated method stub

//初始化要显示的数据集合---start

generals = new ArrayList<General>();

//图片资源集合

int[] resImags = {

R.drawable.baiqi,R.drawable.caocao,R.drawable.chengjisihan,

R.drawable.hanxin,R.drawable.lishimin,R.drawable.nuerhachi,

R.drawable.sunbin,R.drawable.sunwu,R.drawable.yuefei,

R.drawable.zhuyuanzhang

};

//将资源中的字符串组数转换为Java数组

String [] names = getResources().getStringArray(R.array.generals);

for (int i =0;i<resImags.length;i++){

General general = new General(resImags[i],names[i]);

generals.add(general);

}

//初始化要显示的数据集合---end

//初始化listView

gvGenerals = (Gallery) findViewById(R.id.gvGenerals);

//初始化适配器以及设置该listView的适配器

generalAdapt = new GeneralAdapter();

gvGenerals.setAdapter(generalAdapt);

}

class GeneralAdapter extends BaseAdapter {

//得到listView中item的总数

@Override

public int getCount() {

// TODO Auto-generated method stub

return Integer.MAX_VALUE;

}

@Override

public General getItem(int position) {

// TODO Auto-generated method stub

return generals.get(position);

}

@Override

public long getItemId(int position) {

// TODO Auto-generated method stub

return position;

}

//简单来说就是拿到单行的一个布局，然后根据不同的数值，填充主要的listView的每一个item

@Override

public View getView(int position, View convertView, ViewGroup parent) {

// TODO Auto-generated method stub

//拿到ListViewItem的布局，转换为View类型的对象

View layout = View.inflate(MainActivity.this, R.layout.activity_item_generals_, null);

//找到显示军事家头像的ImageView

ImageView ivThumb = (ImageView) layout.findViewById(R.id.ivThumb);

//找到显示军事家名字的TextView

TextView tvName = (TextView) layout.findViewById(R.id.tvName);

//获取军事中下标是position的军事家对象

General general = generals.get(position%10);

//显示军事家头像

ivThumb.setImageResource(general.getImageSrc());

//显示军事家的姓名

tvName.setText(general.getName());

return layout;

}

适配布局页面：layout\activity_item_generals_.xml

<LinearLayout 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:orientation="vertical">

<ImageView

android:id="@+id/ivThumb"

android:layout_width="80dp"

android:layout_height="80dp"

android:src="@drawable/baiqi"/>

<TextView

android:id="@+id/tvName"

android:layout_width="wrap_content"

android:layout_height="80dp"

android:text="白起"

android:textSize="20sp"

android:gravity="center_horizontal"

</LinearLayout>

strings.xml文件

<?xml version="1.0" encoding="utf-8"?>

<string name="hello_world">Hello world!</string>

<string name="action_settings">Settings</string>

<string name="title_activity_item_generals_">ItemGenerals_Activity</string>

<string-array name="generals">

</string-array>

</resources>

将军资源java对象：

package com.litsoft.entity;

public class General {

private int p_w_picpathSrc;

private String name;

public int getImageSrc() {

return p_w_picpathSrc;

}

public void setImageSrc(int p_w_picpathSrc) {

this.p_w_picpathSrc = p_w_picpathSrc;

}

public String getName() {

return name;

}

public void setName(String name) {

this.name = name;

}

public General(int p_w_picpathSrc, String name) {

super();

this.p_w_picpathSrc = p_w_picpathSrc;

this.name = name;

}

效果：

转载于:https://blog.51cto.com/qa962839575/1587135

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