先看看GridView实现单选效果
如果是你需要的,你可以继续往下看了
实现起来比较简单,直接上代码
主Activity的布局,一个Button用来跳转到筛选Activity一个TextView用来显示筛选后的到的结果
<?xml version="1.0" encoding="utf-8"?><RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:id="@+id/activity_main" android:layout_width="match_parent" android:layout_height="match_parent" tools:context="com.duanlian.gridviewsingleselectordomo.MainActivity"> <Button android:layout_width="match_parent" android:layout_height="50dp" android:onClick="buttonClick" android:text="去筛选"/> <TextView android:id="@+id/tv_result" android:layout_width="wrap_content" android:layout_height="wrap_content" android:textSize="30dp" android:textColor="@color/colorAccent" android:layout_centerInParent="true" android:text="筛选结果"/></RelativeLayout>
MainActivity你的代码逻辑,注释已经加上
package com.duanlian.gridviewsingleselectordomo;import android.content.Intent;import android.support.v7.app.AppCompatActivity;import android.os.Bundle;import android.view.View;import android.widget.TextView;public class MainActivity extends AppCompatActivity { private TextView mTextView; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); mTextView = (TextView) findViewById(R.id.tv_result); } /** * button的点击监听 * @param view */ public void buttonClick(View view) { //跳转到筛选的activity Intent intent = new Intent(MainActivity.this, SingleSelectorActivity.class); //通过带返回值的跳转来的到下一个页面带过来的值 startActivityForResult(intent,888); } @Override protected void onActivityResult(int requestCode, int resultCode, Intent data) { super.onActivityResult(requestCode, resultCode, data); if (requestCode == 888 && resultCode == 999) { //拿到上一个页面finish后带过来的值 String pos = data.getStringExtra("pos"); mTextView.setText(pos); } }}
然后就是筛选Activity,布局就一个GridView用来显示待选项, 一个Button用来点击返回主Activity并且把选择的值带过去
<?xml version="1.0" encoding="utf-8"?><RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:id="@+id/activity_single_selector" android:layout_width="match_parent" android:layout_height="match_parent" tools:context="com.duanlian.gridviewsingleselectordomo.SingleSelectorActivity"><Button android:id="@+id/button" android:layout_width="match_parent" android:layout_height="50dp" android:onClick="buttonFinish" android:text="选择完成"/> <GridView android:id="@+id/gridView" android:layout_below="@+id/button" android:layout_width="match_parent" android:layout_height="match_parent" android:columnWidth="80dp" android:horizontalSpacing="5dp" android:verticalSpacing="10dp" android:numColumns="auto_fit"/></RelativeLayout>
然后就是筛选逻辑
package com.duanlian.gridviewsingleselectordomo;import android.content.Intent;import android.os.Bundle;import android.support.v7.app.AppCompatActivity;import android.view.View;import android.widget.AdapterView;import android.widget.GridView;import java.util.ArrayList;import java.util.List;public class SingleSelectorActivity extends AppCompatActivity { private GridView mGridView; private List<String> mList; private GridViewAdapter mAdapter; int selectorPosition = 0; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_single_selector); initView(); } private void initView() { mGridView = (GridView) findViewById(R.id.gridView); //添加数据 mList = new ArrayList<>(); for (int i = 0; i < 100; i++) { mList.add("第 " + i + " 个"); } mAdapter = new GridViewAdapter(this, mList); mGridView.setAdapter(mAdapter); //gridView的点击事件 mGridView.setOnItemClickListener(new AdapterView.OnItemClickListener() { @Override public void onItemClick(AdapterView<?> parent, View view, int position, long id) { //把点击的position传递到adapter里面去 mAdapter.changeState(position); selectorPosition = position; } }); } /** * button的点击监听 * * @param view */ public void buttonFinish(View view) { Intent intent = new Intent(); intent.putExtra("pos", "第 " + selectorPosition + " 个"); setResult(999, intent); finish(); }}
主要的状态改变还是在Adapter里面
package com.duanlian.gridviewsingleselectordomo;import android.content.Context;import android.graphics.Color;import android.view.View;import android.view.ViewGroup;import android.widget.BaseAdapter;import android.widget.RelativeLayout;import android.widget.TextView;import java.util.List;/** * gridView的adapter */public class GridViewAdapter extends BaseAdapter { private Context mContext; private List<String> mList; private int selectorPosition; public GridViewAdapter(Context context, List<String> mList) { this.mContext = context; this.mList = mList; } @Override public int getCount() { return mList != null ? mList.size() : 0; } @Override public Object getItem(int position) { return mList != null ? mList.get(position) : null; } @Override public long getItemId(int position) { return mList != null ? position : 0; } @Override public View getView(int position, View convertView, ViewGroup parent) { convertView = View.inflate(mContext, R.layout.item_gridview, null); RelativeLayout mRelativeLayout = (RelativeLayout) convertView.findViewById(R.id.ll); TextView textView = (TextView) convertView.findViewById(R.id.tv); textView.setText(mList.get(position)); //如果当前的position等于传过来点击的position,就去改变他的状态 if (selectorPosition == position) { mRelativeLayout.setBackgroundResource(R.drawable.grid_shap_two); textView.setTextColor(Color.parseColor("#FF4081")); } else { //其他的恢复原来的状态 mRelativeLayout.setBackgroundResource(R.drawable.grid_shap_one); textView.setTextColor(Color.parseColor("#3F51B5")); } return convertView; } public void changeState(int pos) { selectorPosition = pos; notifyDataSetChanged(); }}
还有item布局
<?xml version="1.0" encoding="utf-8"?><RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="wrap_content" > <RelativeLayout android:id="@+id/ll" android:layout_width="100dp" android:layout_height="32dp" android:layout_centerInParent="true" android:layout_margin="5dp" android:background="@drawable/grid_shap_one" > <TextView android:id="@+id/tv" android:layout_width="match_parent" android:layout_height="match_parent" android:layout_centerHorizontal="true" android:ellipsize="none" android:gravity="center" android:singleLine="true" android:text="英超" android:maxLength="7" android:textColor="@color/colorPrimary" android:textSize="13sp"/> </RelativeLayout></RelativeLayout>
如果你想点击跳转到筛选Activity且待筛选的按钮中,显示你之前选择后的那个按钮状态是选中状态,其实也很简单,只要你把你选中后的position缓存下来,点进去到筛选Activity,实例化Adapter后调用 mAdapter.changeState(position);把你需要改变状态的按钮的position传递过去就行了
其他的小细节请下载demo
点击下载demo
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。
就看你能不能战胜它。战胜了，你就是英雄，就是生活的强者。
