Question

我目前正在开发一个项目，我正在使用GridView。我想知道是否可以重新排列基于GridView的项目，范围从＆＃34;最常点击＆＃34;项目到＆＃34;最少点击＆＃34;项目

谢谢，

Answer 1

对不起，这里的延迟是重新排列点击项目的代码。我希望能满足你的需要。

ExampleData.java文件。

package com.example;

import java.io.Serializable;
import java.util.Comparator;

/**
 * Created by Mustanser Iqbal on 2/6/2015.
 */

public class ExampleData implements Serializable {

    private String name;
    private String title;
    int itemCount;

    public ExampleData(String title,String name,int itemCount) {
        this.name = name;
        this.title = title;
        this.itemCount = itemCount;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getTitle() {
        return title;
    }

    public void setTitle(String title) {
        this.title = title;
    }

    public int getItemCount() {
        return itemCount;
    }

    public void setItemCount(int itemCount) {
        this.itemCount = itemCount;
    }


    // Comparator
    public static class RearrangeData implements Comparator<ExampleData> {
        @Override
        public int compare(ExampleData arg0, ExampleData arg1) {
            return arg0.itemCount - arg1.itemCount;
        }
    }
}

ExampleAdapter.java文件

package com.example;

import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.TextView;

import java.util.ArrayList;
import java.util.Collections;

/**
 * Created by Mustanser Iqbal on 2/6/2016.
 */
public class ExampleAdapter extends BaseAdapter {
    private ArrayList<ExampleData> mExampleData;
    private Context mContext;
    private LayoutInflater inflater;

    public ExampleAdapter(Context context, ArrayList<ExampleData> mExample) {
        this.mContext = context;
        this.mExampleData = mExample;
        this.inflater = (LayoutInflater) mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    }

    @Override
    public int getCount() {
        return mExampleData.size();
    }

    @Override
    public Object getItem(int position) {
        return mExampleData.get(position);
    }

    @Override
    public long getItemId(int position) {
        return position;
    }

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

        ViewHolder holder;
        if (convertView == null) {

            convertView = inflater.inflate(R.layout.grid_item, null);
            holder = new ViewHolder();
            holder.titleTextView = (TextView) convertView.findViewById(R.id.title);
            holder.nameTextView = (TextView) convertView.findViewById(R.id.name);
            holder.countTextView = (TextView) convertView.findViewById(R.id.count);
            convertView.setTag(holder);
        } else {
            holder = (ViewHolder) convertView.getTag();
        }

        holder.titleTextView.setText(mExampleData.get(position).getTitle());

        holder.nameTextView.setText(mExampleData.get(position).getName());
        holder.countTextView.setText(""+mExampleData.get(position).getItemCount());

        convertView.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                mExampleData.get(position).setItemCount((mExampleData.get(position).getItemCount()+1));
                Collections.sort(mExampleData, new ExampleData.RearrangeData());
                Collections.reverse(mExampleData);
                notifyDataSetChanged();
            }
        });
        return convertView;
    }

    public class ViewHolder {
        TextView titleTextView, nameTextView, countTextView;
    }
}

MainActivity .java文件

package com.example;

import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.Window;
import android.widget.GridView;
import android.widget.TextView;

import java.util.ArrayList;
import java.util.Collections;

/**
 * Created by Mustanser Iqbal on 2/6/2016.
 */
public class MainActivity extends AppCompatActivity {

    private ExampleAdapter mExampleAdapter;
    private ArrayList<ExampleData> exampleDataArrayList;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        requestWindowFeature(Window.FEATURE_NO_TITLE);
        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

        Toolbar toolbar = (Toolbar) findViewById(R.id.header);

        TextView actionBarText = (TextView) toolbar.findViewById(R.id.toolbar_title);
        actionBarText.setText(getResources().getString(R.string.title));
        setSupportActionBar(toolbar);
        try {
            getSupportActionBar().setDisplayShowTitleEnabled(false);
        } catch (Exception e) {
            e.printStackTrace();
        }
        // i Assume that this data is coming from server. or anywhere else.

        exampleDataArrayList = new ArrayList<>();
        exampleDataArrayList.add(new ExampleData("Mobile", "Android", 3));
        exampleDataArrayList.add(new ExampleData("Mobile", "iPhone", 6));
        exampleDataArrayList.add(new ExampleData("Mobile", "BlackBarry", 7));
        exampleDataArrayList.add(new ExampleData("Mobile", "Windows", 9));
        exampleDataArrayList.add(new ExampleData("Mobile", "Sony", 2));
        exampleDataArrayList.add(new ExampleData("Laptop", "HP", 5));
        exampleDataArrayList.add(new ExampleData("Laptop Charger", "XYZ Comapny", 8));

        Collections.sort(exampleDataArrayList, new ExampleData.RearrangeData());
        Collections.reverse(exampleDataArrayList);

        GridView gridView = (GridView) findViewById(R.id.gridView);
        mExampleAdapter = new ExampleAdapter(this, exampleDataArrayList);
        gridView.setAdapter(mExampleAdapter);

    }

}

action_bar.xml文件

<?xml version="1.0" encoding="utf-8"?>
<android.support.v7.widget.Toolbar xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/toolbar_top"
    style="@style/TextAppearance.AppCompat.Widget.ActionBar.Title"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:background="@color/bg_color"
    android:minHeight="?attr/actionBarSize">


    <TextView
        android:id="@+id/toolbar_title"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="start"
        android:textSize="20sp"
        android:textColor="@color/header_text_color"
        android:text="" />


</android.support.v7.widget.Toolbar>

activity_main.xml文件

<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"
    tools:context=".MainActivity">

    <include android:id="@+id/header"
        layout="@layout/action_bar"/>

    <GridView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_below="@+id/header"
        android:id="@+id/gridView"
        android:layout_marginLeft="10dp"
        android:layout_marginStart="10dp"
        android:layout_marginEnd="10dp"
        android:clipToPadding="true"
        android:columnWidth="150dp"
        android:numColumns="2"
        android:verticalSpacing="2dp"
        android:horizontalSpacing="2dp"
        android:fastScrollEnabled="true"
        android:focusable="true"
        android:layout_marginRight="10dp"
        android:layout_centerInParent="true"
        android:layout_centerVertical="true"
        android:gravity="center"/>
</RelativeLayout>

grid_item.xml文件

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="wrap_content"
    android:layout_height="80dp"
    android:layout_margin="2dp"
    android:background="@android:color/holo_green_dark">

    <TextView
        android:id="@+id/title"
        android:text=""
        android:textStyle="bold"
        android:textColor="@android:color/white"
        android:textSize="15sp"
        android:padding="10dp"
        android:gravity="center"
        android:layout_centerHorizontal="true"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />

    <TextView
        android:id="@+id/name"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text=""
        android:padding="10dp"
        android:textSize="15sp"
        android:gravity="start"
        android:textColor="@android:color/white"
        android:layout_centerHorizontal="true"
        android:layout_below="@+id/title"/>

    <TextView
        android:id="@+id/count"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text=""
        android:padding="10dp"
        android:textSize="15sp"
        android:textColor="@android:color/white"
        android:gravity="center"
        android:layout_alignParentEnd="true"
        android:layout_below="@+id/title"/>

</RelativeLayout>

colors.xml

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <color name="bg_color">#686d77</color>
    <color name="header_text_color">#64B5F6</color>
    <color name="header_text_color_selected">#95caf4</color>
</resources>

的strings.xml

<resources>
    <string name="app_name">Rearrange GridItems</string>
       <string name="title">ReArrange GridItems Example</string>
</resources>

styles.xml

<resources>

    <!-- Base application theme. -->
    <style name="AppTheme" parent="Theme.AppCompat.Light.NoActionBar">
        <!-- Customize your theme here. -->
    </style>

</resources>

自动重新排列GridView项目

1 个答案: