C# 开发Android 如何反射得到Resource.Drawable类

Question

Mono For AndroidAndroidC# C#  反射

Answer 1

这是利用Java获取resource中的图片：package com.hades.gallery;import java.lang.reflect.Field;import java.util.ArrayList;import android.app.Activity;import android.content.Context;import android.graphics.Bitmap;import android.graphics.BitmapFactory;import android.os.Bundle;import android.view.View;import android.view.ViewGroup;import android.widget.AdapterView;import android.widget.AdapterView.OnItemClickListener;import android.widget.BaseAdapter;import android.widget.Gallery;import android.widget.ImageView; public class MainGalleryActivity extends Activity implements OnItemClickListener {   /**    * @蓝色着衣    * 使用反射机制来获取drawable里面的图片    */   private Gallery gallery;    @Override   protected void onCreate(Bundle savedInstanceState) {      super.onCreate(savedInstanceState);      setContentView(R.layout.gallery);       gallery = (Gallery) findViewById(R.id.gallery);      gallery.setAdapter(new ImageAdapter(this));      // 设置gallery监听      gallery.setOnItemClickListener(this);   }    public void onItemClick(AdapterView<?> parent, View view, int position,   long id) {    MainGalleryActivity.this.setTitle(String.valueOf(position));   }   public class ImageAdapter extends BaseAdapter {      private Context mContext;      private ArrayList<Integer> imgList = new ArrayList<Integer>();      private ArrayList<Object> imgSize = new ArrayList<Object>();      public ImageAdapter(Context context) {        mContext = context;        /*         * 反射机制         */        // 得到drawable下所有图片的名字        Field[] fields = R.drawable.class.getDeclaredFields();        for (Field field : fields) {           if (!"ic_launcher".equals(field.getName())) {              try {                 int index = field.getInt(R.drawable.class);                 imgList.add(index);                  int size[] = new int[2];                 Bitmap bitmap = BitmapFactory.decodeResource(                      getResources(), index);                 size[0] = bitmap.getWidth();                 size[1] = bitmap.getHeight();                 imgSize.add(size);              } catch (IllegalArgumentException e) {                 e.printStackTrace();              } catch (IllegalAccessException e) {                 e.printStackTrace();              }           }        }      }       public int getCount() {        return imgList.size();      }       public Object getItem(int position) {        return position;      }       public long getItemId(int position) {        return position;      }       public View getView(int position, View convertView, ViewGroup parent) {        ImageView imgView = new ImageView(mContext);    imgView.setImageResource(imgList.get(position).intValue());        imgView.setScaleType(ImageView.ScaleType.FIT_XY);        int size[] = new int[2];        size = (int[]) imgSize.get(position);        imgView.setLayoutParams(new Gallery.LayoutParams(size[0], size[1]));        return imgView;      }   }}下面是gallery.xml
<?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="match_parent"    android:gravity="center_horizontal"    android:orientation="vertical" >    <Gallery        android:id="@+id/gallery"        android:layout_width="match_parent"        android:layout_height="match_parent"        android:spacing="10dp" /></RelativeLayout>

Answer 2

 利用c#的反射机制得到类的信息： 
using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
using System.Reflection;namespace GuiReflect
{
    /// <summary>
    /// Form1 的摘要说明。
    /// </summary>
    public class Form1 : System.Windows.Forms.Form
    {
        private System.Windows.Forms.Label label1;
        private System.Windows.Forms.TextBox txtB_Name;
        private System.Windows.Forms.GroupBox groupBox1;
        private System.Windows.Forms.TextBox txtB_Method;
        private System.Windows.Forms.TextBox txtB_property;
        private System.Windows.Forms.TextBox txtB_parent;
        private System.Windows.Forms.Label label2;
        private System.Windows.Forms.Label label3;
        private System.Windows.Forms.Label label4;
        private System.Windows.Forms.Button button1;
        private System.Windows.Forms.Label label5;
        private System.Windows.Forms.Label labNameSpace;
        /// <summary>
        /// 必需的设计器变量。
        /// </summary>
        private System.ComponentModel.Container components = null;        public Form1()
        {
            //
            // Windows 窗体设计器支持所必需的
            //
            InitializeComponent();
            //
            // TODO: 在 InitializeComponent 调用后添加任何构造函数代码
            //
        }
        /// <summary>
        /// 清理所有正在使用的资源。
        /// </summary>
        protected override void Dispose( bool disposing )
        {
            if( disposing )
            {
                if (components != null) 
                {
                    components.Dispose();
                }
            }
            base.Dispose( disposing );
        }        #region Windows 窗体设计器生成的代码
        /// <summary>
        /// 设计器支持所需的方法 - 不要使用代码编辑器修改
        /// 此方法的内容。
        /// </summary>
        private void InitializeComponent()
        {
            System.Resources.ResourceManager resources = new System.Resources.ResourceManager(typeof(Form1));
            this.txtB_Name = new System.Windows.Forms.TextBox();
            this.label1 = new System.Windows.Forms.Label();
            this.groupBox1 = new System.Windows.Forms.GroupBox();
            this.labNameSpace = new System.Windows.Forms.Label();
            this.label5 = new System.Windows.Forms.Label();
            this.label4 = new System.Windows.Forms.Label();
            this.label3 = new System.Windows.Forms.Label();
            this.label2 = new System.Windows.Forms.Label();
            this.txtB_parent = new System.Windows.Forms.TextBox();
            this.txtB_property = new System.Windows.Forms.TextBox();
            this.txtB_Method = new System.Windows.Forms.TextBox();
            this.button1 = new System.Windows.Forms.Button();
            this.groupBox1.SuspendLayout();
            this.SuspendLayout();
            // 
            // txtB_Name
            // 
            this.txtB_Name.Location = new System.Drawing.Point(144, 30);
            this.txtB_Name.Name = "txtB_Name";
            this.txtB_Name.Size = new System.Drawing.Size(272, 21);
            this.txtB_Name.TabIndex = 0;
            this.txtB_Name.Text = "";
            // 
            // label1
            // 
            this.label1.Location = new System.Drawing.Point(40, 32);
            this.label1.Name = "label1";
            this.label1.Size = new System.Drawing.Size(56, 16);
            this.label1.TabIndex = 1;
            this.label1.Text = "c＃类名";
            this.label1.Click += new System.EventHandler(this.label1_Click);
            // 
            // groupBox1
            // 
            this.groupBox1.Controls.Add(this.labNameSpace);
            this.groupBox1.Controls.Add(this.label5);
            this.groupBox1.Controls.Add(this.label4);
            this.groupBox1.Controls.Add(this.label3);
            this.groupBox1.Controls.Add(this.label2);
            this.groupBox1.Controls.Add(this.txtB_parent);
            this.groupBox1.Controls.Add(this.txtB_property);
            this.groupBox1.Controls.Add(this.txtB_Method);
            this.groupBox1.Location = new System.Drawing.Point(16, 96);
            this.groupBox1.Name = "groupBox1";
            this.groupBox1.Size = new System.Drawing.Size(624, 360);
            this.groupBox1.TabIndex = 2;
            this.groupBox1.TabStop = false;
            this.groupBox1.Text = "结果显示";
            // 
            // labNameSpace
            // 
            this.labNameSpace.Location = new System.Drawing.Point(72, 24);
            this.labNameSpace.Name = "labNameSpace";
            this.labNameSpace.Size = new System.Drawing.Size(272, 23);
            this.labNameSpace.TabIndex = 7;
            this.labNameSpace.TextAlign = System.Drawing.ContentAlignment.MiddleLeft;
            // 
            // label5
            // 
            this.label5.Location = new System.Drawing.Point(16, 24);
            this.label5.Name = "label5";
            this.label5.Size = new System.Drawing.Size(56, 23);
            this.label5.TabIndex = 6;
            this.label5.Text = "命名空间";
            this.label5.TextAlign = System.Drawing.ContentAlignment.MiddleCenter;
            // 
            // label4
            // 
            this.label4.Location = new System.Drawing.Point(462, 64);
            this.label4.Name = "label4";
            this.label4.TabIndex = 5;
            this.label4.Text = "父类列表";
            this.label4.TextAlign = System.Drawing.ContentAlignment.MiddleCenter;
            // 
            // label3
            // 
            this.label3.Location = new System.Drawing.Point(264, 64);
            this.label3.Name = "label3";
            this.label3.TabIndex = 4;
            this.label3.Text = "属性列表";
            this.label3.TextAlign = System.Drawing.ContentAlignment.MiddleCenter;
            // 
            // label2
            // 
            this.label2.Location = new System.Drawing.Point(24, 64);
            this.label2.Name = "label2";
            this.label2.Size = new System.Drawing.Size(176, 23);
            this.label2.TabIndex = 3;
            this.label2.Text = "方法列表";
            this.label2.TextAlign = System.Drawing.ContentAlignment.TopCenter;
            // 
            // txtB_parent
            // 
            this.txtB_parent.Location = new System.Drawing.Point(416, 96);
            this.txtB_parent.Multiline = true;
            this.txtB_parent.Name = "txtB_parent";
            this.txtB_parent.ScrollBars = System.Windows.Forms.ScrollBars.Both;
            this.txtB_parent.Size = new System.Drawing.Size(192, 240);
            this.txtB_parent.TabIndex = 2;
            this.txtB_parent.Text = "";
            // 
            // txtB_property
            // 
            this.txtB_property.Location = new System.Drawing.Point(226, 96);
            this.txtB_property.Multiline = true;
            this.txtB_property.Name = "txtB_property";
            this.txtB_property.ScrollBars = System.Windows.Forms.ScrollBars.Both;
            this.txtB_property.Size = new System.Drawing.Size(176, 240);
            this.txtB_property.TabIndex = 1;
            this.txtB_property.Text = "";
            // 
            // txtB_Method
            // 
            this.txtB_Method.Location = new System.Drawing.Point(24, 96);
            this.txtB_Method.Multiline = true;
            this.txtB_Method.Name = "txtB_Method";
            this.txtB_Method.ScrollBars = System.Windows.Forms.ScrollBars.Vertical;
            this.txtB_Method.Size = new System.Drawing.Size(176, 240);
            this.txtB_Method.TabIndex = 0;
            this.txtB_Method.Text = "";
            // 
            // button1
            // 
            this.button1.Location = new System.Drawing.Point(520, 29);
            this.button1.Name = "button1";
            this.button1.TabIndex = 3;
            this.button1.Text = "获得列表";
            this.button1.Click += new System.EventHandler(this.button1_Click);
            // 
           

Answer 3

接上： // Form1
            // 
            this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
            this.ClientSize = new System.Drawing.Size(656, 469);
            this.Controls.Add(this.button1);
            this.Controls.Add(this.groupBox1);
            this.Controls.Add(this.label1);
            this.Controls.Add(this.txtB_Name);
            this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.FixedSingle;
            this.Icon = ((System.Drawing.Icon)(resources.GetObject("$this.Icon")));
            this.MaximizeBox = false;
            this.Name = "Form1";
            this.Text = "代码反射机制的应用";
            this.groupBox1.ResumeLayout(false);
            this.ResumeLayout(false);        }
        #endregion        /// <summary>
        /// 应用程序的主入口点。
        /// </summary>
        [STAThread]
        static void Main() 
        {
            Application.Run(new Form1());
        }        private void label1_Click(object sender, System.EventArgs e)
        {
        
        }        private void button1_Click(object sender, System.EventArgs e)
        {
            labNameSpace.Text="";
            txtB_Method.Text="";
            txtB_property.Text="";
            txtB_parent.Text="";
            if(txtB_Name.Text=="")
                txtB_Method.Text="类名不能为空";
            else
            {    
                string test="System."+txtB_Name.Text.ToString().Trim();
                try
                {
                    Type carType=Type.GetType(test);
                    labNameSpace.Text=carType.Namespace.ToString();
                    //得到类的方法代码
                    MethodInfo [] methods=carType.GetMethods();                
                    int NumMethod=0;
                    foreach(MethodInfo method in methods)
                    {
                        NumMethod++;
                        txtB_Method.Text+=NumMethod+"->"+method.Name.ToString()+" ";                    
                    }
                    //得到类的属性的代码
                    PropertyInfo []  properties=carType.GetProperties();
                    int NumPropertie=0;
                    foreach(PropertyInfo propertie in properties)
                    {
                        NumPropertie++;
                        txtB_property.Text+=NumPropertie+"->"+propertie.Name.ToString()+" ";    
                    }
                    //得到类的层次机构的代码
                    int NumParent=0;
                    Type parent=carType.BaseType;                
                    while(parent!=null)
                    {
                        NumParent++;
                        txtB_parent.Text+=NumParent+"->"+parent.Name.ToString()+" ";
                        parent=parent.BaseType;
                    }
                }
                catch(TypeLoadException e1)
                {
                    txtB_Method.Text=e1.Message;
                    
                }
                catch(Exception e2)
                {
                    txtB_Method.Text=e2.Message;
                    
                }
                
                
            }
        }
    }
}

Answer 4

    还是谢谢你这么长的回答 我看了下代码 我好像找到了怎么获取Drawable类的 方法
  Type.GetType(Resource.Drawable)  是不是就获得了 Drawable 的Type对象？  但是好像还是报了 错

Answer 5

Type.GetType(“Resource.Drawable”)  这样可以了 谢谢你