Android实现风蓝记事本（7）：换皮肤功能

我就是我 2022-05-24 04:24 336阅读 0赞

思路：用一个网格布局存放图片数组，当点击某张图片时，就把背景换成该图片，用SharedPreferences sp存储数据 ，然后写进sp，其他页面的背景是从sp中读到该图片，所以其他页面的背景就变为我们选择的图片。

package com.example.notes;
    
    import java.util.ArrayList;
    import java.util.HashMap;
    import java.util.List;
    import java.util.Map;
    
    import android.app.Activity;
    import android.content.Context;
    import android.content.Intent;
    import android.content.SharedPreferences;
    import android.content.SharedPreferences.Editor;
    import android.os.Bundle;
    import android.text.Layout;
    import android.view.Menu;
    import android.view.View;
    import android.view.View.OnClickListener;
    import android.widget.AdapterView;
    import android.widget.AdapterView.OnItemClickListener;
    import android.widget.GridView;
    import android.widget.ImageButton;
    import android.widget.LinearLayout;
    import android.widget.SimpleAdapter;
    
    public class Skin extends Activity{
        private GridView grid;//网格布局
        private ImageButton skin_back;//返回
        private LinearLayout layout;
        private int background;
        private  SharedPreferences sp;//存储数据
        private Editor editor;//
        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.skin);
            layout = (LinearLayout)findViewById(R.id.skin);
            background=R.drawable.skin_first;
            getBackground();
    
            grid=(GridView)findViewById(R.id.skinGrid);
            skin_back=(ImageButton)findViewById(R.id.skin_back);
            skin_back.setOnClickListener(click);
            grid.setNumColumns(2);//网格布局2列
            grid.setAdapter(getAdapter());
            grid.setOnItemClickListener(gridClick);
    
        }
    
        private OnItemClickListener gridClick=new OnItemClickListener() {
    
            @Override
            public void onItemClick(AdapterView<?> parent, View view, int position,
                                    long id) {
                // TODO Auto-generated method stub
                switch (position) {
                    case 0:
                        background=R.drawable.skin_first;
                        setBackground(background);
                        getBackground();
                        back();
                        break;
                    case 1:
                        background=R.drawable.skin_second;
                        setBackground(background);
                        getBackground();
                        back();
                        break;
                    case 2:
                        background=R.drawable.skin_three;
                        setBackground(background);
                        getBackground();
                        back();
                        break;
                    case 3:
                        background=R.drawable.skin_four;
                        setBackground(background);
                        getBackground();
                        back();
                        break;
                    case 4:
                        background=R.drawable.skin_five;
                        setBackground(background);
                        getBackground();
                        back();
                        break;
                    case 5:
                        background=R.drawable.skin_six;
                        setBackground(background);
                        getBackground();
                        back();
                        break;
                    default:
                        break;
                }
            }
        };
        //返回主界面
        private void back(){
            Intent intent=new Intent(Skin.this,MainActivity.class);
            startActivity(intent);
            finish();
        }
        //设置背景
        private void getBackground(){
            sp=getSharedPreferences("backgrounds", Context.MODE_PRIVATE);
            background=sp.getInt("background",background);
            layout.setBackgroundResource(background);
        }
        //写入背景
        private void setBackground(int background){
            sp=getSharedPreferences("backgrounds",Context.MODE_PRIVATE);
            editor=sp.edit();
            editor.putInt("background", background);
            editor.commit();
        }
        private OnClickListener click=new OnClickListener() {
    
            @Override
            public void onClick(View arg0) {
                // TODO Auto-generated method stub
                Intent intent=new Intent(Skin.this,MainActivity.class);
                startActivity(intent);
                finish();
    
            }
        };
        //背景列表
        private SimpleAdapter getAdapter() {
            // TODO Auto-generated method stub
            SimpleAdapter adapter=new SimpleAdapter(this, getSkin(), R.layout.skinitem,
                    new String[]{"skin_img","skin_txt"},
                    new int[]{R.id.skin_img,R.id.skin_txt
                    });
            return adapter;
        }
        //获得背景列表数据
        private List< Map<String, Object>> getSkin() {
            // TODO Auto-generated method stub
            List<Map<String,Object>>list=new ArrayList<Map<String,Object>>();
            int []skin_imgs={ R.drawable.skin_first, R.drawable.skin_second, R.drawable.skin_three,
                    R.drawable.skin_four,R.drawable.skin_five,R.drawable.skin_six };
            int []skin_txts={ R.string.skin_first, R.string.skin_second,
                    R.string.skin_three,R.string.skin_four,R.string.skin_five, R.string.skin_six };
            for(int i=0;i<skin_imgs.length;i++){
                HashMap<String,Object>map=new HashMap<String,Object>();
                map.put("skin_img", skin_imgs[i]);
                map.put("skin_txt", getResources().getString(skin_txts[i]));
                list.add(map);
            }
            return list;
        }
        @Override
        public boolean onCreateOptionsMenu(Menu menu) {
            return true;
        }
    }

用到的布局：setContentView(R.layout.skin)--》skin.xml

<?xml version="1.0" encoding="utf-8"?>
    <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
            android:id="@+id/skin"
            android:layout_width="wrap_content"
            android:layout_height="match_parent"
            android:background="@drawable/skin_first"
            android:gravity="center"
            android:orientation="vertical" >
    
    <LinearLayout
            android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:orientation="horizontal" >
    
    <ImageButton
                android:id="@+id/skin_back"
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:background="@color/transparent"
                        android:contentDescription="@string/back_btn"
                        android:padding="8dp"
                        android:src="@drawable/back" />
    </LinearLayout>
    
    <GridView
            android:id="@+id/skinGrid"
                    android:layout_width="match_parent"
                    android:layout_height="match_parent"
                    android:background="@color/transparent"
                    android:gravity="center"
                    android:horizontalSpacing="2dip"
                    android:numColumns="2"
                    android:stretchMode="columnWidth"
                    android:verticalSpacing="10dip" >
    </GridView>
    
    </LinearLayout>

# 注：源码下载：[https://download.csdn.net/download/weixin\_39220472/10426057][https_download.csdn.net_download_weixin_39220472_10426057] #

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[https_download.csdn.net_download_weixin_39220472_10426057]: https://download.csdn.net/download/weixin_39220472/10426057