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  • ListView circleImageView Item test

    Using the code

    activity_main.xml:
    <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" >
     
    <ListView
    android:id="@+id/android:list"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_alignParentLeft="true"
    android:layout_alignParentTop="true" >
    </ListView>
    </RelativeLayout>
     

    list_item.xml:
    <?xml version="1.0" encoding="utf-8"?>
    <LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="horizontal"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:padding="8dp">
     
    <TextView
    android:id="@+id/title"
    android:textColor="#000"
    android:layout_width="0dp"
    android:layout_weight="1"
    android:layout_margin="10dp"
    android:layout_height="wrap_content"/>
     
    <ImageView
    android:id="@+id/imageview"
    android:layout_width="50dp"
    android:layout_height="50dp"
    android:src="@drawable/ic_launcher"
    android:layout_marginRight="10dp"
    android:contentDescription="@string/app_name"/>
     
    </LinearLayout>
     

    MainActivity.java:
    package com.example.list;
     
    import java.util.ArrayList;
    import java.util.Arrays;
    import android.os.Bundle;
    import android.app.Activity;
    import android.app.ListActivity;
    import android.content.Context;
    import android.graphics.Bitmap;
    import android.graphics.BitmapFactory;
    import android.graphics.Canvas;
    import android.graphics.Path;
    import android.graphics.Rect;
    import android.view.LayoutInflater;
    import android.view.View;
    import android.view.ViewGroup;
    import android.widget.AdapterView;
    import android.widget.BaseAdapter;
    import android.widget.ImageView;
    import android.widget.ListView;
    import android.widget.TextView;
    import android.widget.Toast;
    import android.widget.AdapterView.OnItemClickListener;
     
    public class MainActivity extends ListActivity 
    {
     
     private String[] listview_names =  {"India","Bangladesh", "China","Indonesia" };
     
     static Context mcontext;
     
     private static int[] listview_images = 
     {
     R.drawable.india,R.drawable.bangladesh,R.drawable.china,
     R.drawable.indonesia};
     
     private ListView lv;
     private static ArrayList<String> array_sort;
     private static ArrayList<Integer> image_sort;
     @Override
     protected void onCreate(Bundle savedInstanceState) 
     {
      super.onCreate(savedInstanceState);
      setContentView(R.layout.activity_main);
     
      lv = (ListView) findViewById(android.R.id.list);
     
      array_sort=new ArrayList<String> (Arrays.asList(listview_names));
      image_sort=new ArrayList<Integer>();
      for (int index = 0; index < listview_images.length; index++)
      {
       image_sort.add(listview_images[index]);
      }
     
      setListAdapter(new bsAdapter(this));
     
      lv.setOnItemClickListener(new OnItemClickListener() {
     
      public void onItemClick(AdapterView<?> arg0,
      View arg1, int position, long arg3)
      {
       Toast.makeText(getApplicationContext(), array_sort.get(position),
       Toast.LENGTH_SHORT).show();
      }
     });
     
    }
    public static class bsAdapter extends BaseAdapter
    {
     Activity cntx;
     public bsAdapter(Activity context)
     {
     // TODO Auto-generated constructor stub
     this.cntx=context;
    }
     
    public int getCount()
    {
     // TODO Auto-generated method stub
     return array_sort.size();
    }
     
    public Object getItem(int position)
    {
     // TODO Auto-generated method stub
     return array_sort.get(position);
    }
     
    public long getItemId(int position)
    {
     // TODO Auto-generated method stub
     return array_sort.size();
    }
     
    public View getView(final int position, View convertView, ViewGroup parent)
    {
     View row=null;
     
     LayoutInflater inflater=cntx.getLayoutInflater();
     row=inflater.inflate(R.layout.list_itemnull);
     
     TextView tv = (TextView) row.findViewById(R.id.title);
     ImageView im = (ImageView) row.findViewById(R.id.imageview);
     
     tv.setText(array_sort.get(position));
     
     im.setImageBitmap(getRoundedShape(decodeFile(cntx, listview_images[pos ition]),200));
     
     return row;
    }
     
    public static Bitmap decodeFile(Context context,int resId) {
    try {
    // decode image size
    mcontext=context;
    BitmapFactory.Options o = new BitmapFactory.Options();
    o.inJustDecodeBounds = true;
    BitmapFactory.decodeResource(mcontext.getResources(), resId, o);
    // Find the correct scale value. It should be the power of 2.
    final int REQUIRED_SIZE = 200;
    int width_tmp = o.outWidth, height_tmp = o.outHeight;
    int scale = 1;
    while (true)
    {
     if (width_tmp / 2 < REQUIRED_SIZE
     || height_tmp / 2 < REQUIRED_SIZE)
     break;
     width_tmp /= 2;
     height_tmp /= 2;
     scale++;
    }
    // decode with inSampleSize
    BitmapFactory.Options o2 = new BitmapFactory.Options();
    o2.inSampleSize = scale;
    return BitmapFactory.decodeResource(mcontext.getResources(), resId, o2);
    catch (Exception e) {
    }
    return null;
    }
    }
    public static Bitmap getRoundedShape(Bitmap scaleBitmapImage,int width) {
     // TODO Auto-generated method stub
     int targetWidth = width;
     int targetHeight = width;
     Bitmap targetBitmap = Bitmap.createBitmap(targetWidth,
     targetHeight,Bitmap.Config.ARGB_8888);
     
     Canvas canvas = new Canvas(targetBitmap);
     Path path = new Path();
     path.addCircle(((float) targetWidth - 1) / 2,
     ((float) targetHeight - 1) / 2,
     (Math.min(((float) targetWidth),
     ((float) targetHeight)) / 2),
     Path.Direction.CCW);
     canvas.clipPath(path);
     Bitmap sourceBitmap = scaleBitmapImage;
     canvas.drawBitmap(sourceBitmap,
     new Rect(0, 0, sourceBitmap.getWidth(),
     sourceBitmap.getHeight()),
     new Rect(0, 0, targetWidth,
     targetHeight), null);
     return targetBitmap;
     }
    }
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  • 原文地址:https://www.cnblogs.com/stewartlj/p/5443768.html
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