2011-07-13 64 views
0

我下面的代码,我想显示在gallery.But选择的图像,但我得到一个默认的Android图像,而不是我保存的图像。我在做什么错了如何解决这个问题..Android图库显示选定的图像

package HGallery.com; 

import HGallery.com.R; 
import HGallery.com.HGalleryActivity.ImageAdapter; 
import android.app.Activity; 
import android.os.Bundle; 

import android.content.Context; 
import android.content.res.TypedArray; 
import android.graphics.drawable.Drawable; 

import android.view.View; 
import android.view.ViewGroup; 
import android.widget.AdapterView; 
import android.widget.AdapterView.OnItemClickListener; 
import android.widget.AdapterView.OnItemSelectedListener; 
import android.widget.BaseAdapter; 
import android.widget.Gallery; 
import android.widget.ImageView; 
import android.widget.Toast; 

public class HGalleryActivity extends Activity { 
/** Called when the activity is first created. */ 
@Override 
public void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.main); 
    final ImageView iv=(ImageView) findViewById(R.id.imageView1); 
    iv.setVisibility(View.INVISIBLE); 



    Gallery g = (Gallery) findViewById(R.id.gallery); 
    g.setAdapter(new ImageAdapter(this)); 

    g.setOnItemClickListener(new OnItemClickListener() { 
     public void onItemClick(AdapterView parent, View v, int position, long id) { 
      //Toast.makeText(HGalleryActivity.this, "here", Toast.LENGTH_SHORT).show(); 
      //Toast.makeText(HGalleryActivity.this, "" + position, Toast.LENGTH_SHORT).show(); 

      iv.setVisibility(View.VISIBLE); 
      Drawable d=getResources().getDrawable(R.drawable.icon); 
      //Toast.makeText(HGalleryActivity.this, ""+d, Toast.LENGTH_SHORT).show(); 
      iv.setImageDrawable(d);  


     } 
    }); 



} 
public class ImageAdapter extends BaseAdapter { 
    int mGalleryItemBackground; 
    private Context mContext; 

    private Integer[] mImageIds = { 
      R.drawable.sample_1, 
      R.drawable.sample_2, 
      R.drawable.sample_3 

    }; 

    public ImageAdapter(Context c) { 
     mContext = c; 
     TypedArray a = obtainStyledAttributes(R.styleable.HelloGallery); 
     mGalleryItemBackground = a.getResourceId(
       R.styleable.HelloGallery_android_galleryItemBackground, 0); 
     a.recycle(); 
    } 

    public int getCount() { 
     return mImageIds.length; 
    } 

    public Object getItem(int position) { 
     return position; 
    } 

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

    public View getView(int position, View convertView, ViewGroup parent) { 
     ImageView i = new ImageView(mContext); 

     i.setImageResource(mImageIds[position]); 
     i.setLayoutParams(new Gallery.LayoutParams(150, 100)); 
     i.setScaleType(ImageView.ScaleType.FIT_XY); 
     i.setBackgroundResource(mGalleryItemBackground); 

     return i; 
    } 

/* public View getView(int arg0, View arg1, ViewGroup arg2) { 
     // TODO Auto-generated method stub 
     return null; 
    }*/ 
} 
} 

main.xml中

<?xml version="1.0" encoding="utf-8"?> 
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
android:orientation="vertical" 
android:layout_width="fill_parent" 
android:layout_height="fill_parent" 
> 
<TextView 
android:layout_width="fill_parent" 
android:layout_height="wrap_content" 
android:text="@string/hello" 
/> 
    <Gallery xmlns:android="http://schemas.android.com/apk/res/android" 
android:id="@+id/gallery" 
android:layout_width="fill_parent" 
android:layout_height="wrap_content" 
/> 
<ImageView android:id="@+id/imageView1" android:layout_width="320px" android:layout_height="250px"></ImageView> 
<!-- <ImageView android:layout_width="wrap_content" android:id="@+id/imageView2" android:layout_height="wrap_content" android:src="@drawable/icon"></ImageView>--> 

+0

不确定这是否相关,但是你的onItemClick方法不引用特定项目点击。它只涉及可绘制文件夹中的某个单独图像,无论称为“图标”的图像是什么。 – AlbeyAmakiir

+0

图标是默认情况下可用的图标right.Let我这样把问题onclcik我如何填充图像视图与当前选择的图像 – Rajeev

回答

0

您ImageAdapter里面的方法称为public Object getItem(int position)应该进行修改,以返回适当mImageIds[]通过使用position参数。然后,在onItemClick内,您可以拨打parent.getItemAtPosition(position)获取资源ID。

如果你想用这个方法来处理id以外的东西,你可以编写你自己的get方法(我叫getResourceId),并且调用((ImageAdapter)parent.getAdapter()).getResourceId(position))

+0

嗨,你能告诉我你说的第一个实现的代码。 – Rajeev

+0

这很简单。只需将'return position;'替换为'return mImageIds [position];'并更改返回类型(因为它不是方法签名的一部分,尽管可以将其保留为Object,并只是施加结果)。在'onItemClick'中,你可以将行更改为'Drawable d = getResources()。getDrawable(parent.getItemAtPosition(position));' – AlbeyAmakiir

0

请按照此链接Galley Best Example。我希望对你有所帮助...

+0

谢谢................. .... – Rajeev

+0

嗨Rajeev PLZ upvote我的答案,如果有帮助..... – Arun