先看看GridView實現單選效果
如果是你需要的,你可以繼續往下看了
實現起來比較簡單,直接上代碼
主Activity的布局,一個Button用來跳轉到篩選Activity一個TextView用來顯示篩選后的到的結果
<?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="去篩選"/> <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="篩選結果"/></RelativeLayout>
MainActivity你的代碼邏輯,注釋已經加上
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的點擊監聽 * @param view */ public void buttonClick(View view) { //跳轉到篩選的activity Intent intent = new Intent(MainActivity.this, SingleSelectorActivity.class); //通過帶返回值的跳轉來的到下一個頁面帶過來的值 startActivityForResult(intent,888); } @Override protected void onActivityResult(int requestCode, int resultCode, Intent data) { super.onActivityResult(requestCode, resultCode, data); if (requestCode == 888 && resultCode == 999) { //拿到上一個頁面finish后帶過來的值 String pos = data.getStringExtra("pos"); mTextView.setText(pos); } }}然后就是篩選Activity,布局就一個GridView用來顯示待選項,
一個Button用來點擊返回主Activity并且把選擇的值帶過去
<?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="選擇完成"/> <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>
然后就是篩選邏輯
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); //添加數據 mList = new ArrayList<>(); for (int i = 0; i < 100; i++) { mList.add("第 " + i + " 個"); } mAdapter = new GridViewAdapter(this, mList); mGridView.setAdapter(mAdapter); //gridView的點擊事件 mGridView.setOnItemClickListener(new AdapterView.OnItemClickListener() { @Override public void onItemClick(AdapterView<?> parent, View view, int position, long id) { //把點擊的position傳遞到adapter里面去 mAdapter.changeState(position); selectorPosition = position; } }); } /** * button的點擊監聽 * * @param view */ public void buttonFinish(View view) { Intent intent = new Intent(); intent.putExtra("pos", "第 " + selectorPosition + " 個"); setResult(999, intent); finish(); }}主要的狀態改變還是在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)); //如果當前的position等于傳過來點擊的position,就去改變他的狀態 if (selectorPosition == position) { mRelativeLayout.setBackgroundResource(R.drawable.grid_shap_two); textView.setTextColor(Color.parseColor("#FF4081")); } else { //其他的恢復原來的狀態 mRelativeLayout.setBackgroundResource(R.drawable.grid_shap_one); textView.setTextColor(Color.parseColor("#3F51B5")); } return convertView; } public void changeState(int pos) { selectorPosition = pos; notifyDataSetChanged(); }}還有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>
如果你想點擊跳轉到篩選Activity且待篩選的按鈕中,顯示你之前選擇后的那個按鈕狀態是選中狀態,其實也很簡單,只要你把你選中后的position緩存下來,點進去到篩選Activity,實例化Adapter后調用 mAdapter.changeState(position);把你需要改變狀態的按鈕的position傳遞過去就行了
其他的小細節請下載demo
點擊下載demo
以上就是本文的全部內容，希望對大家的學習有所幫助，也希望大家多多支持武林網。
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