Android图库显示所选图像 [英] Android Gallery display selected image
问题描述
我下面codeI正在尝试显示在gallery.But选择,我收到了默认的Android形象,不是我saved.What图像的图像我做错了如何解决这个..
I the following code i am trying to display the image that is selected in the gallery.But i get a default android image and not the image that i saved.What am i doing wrong how to resolve this..
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
main.xml
<?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>-->
推荐答案
您ImageAdapter内的方法叫做公开对象的getItem(INT位置)
应进行修改,以返回合适 mImageIds []
使用位置
参数。然后,在 onItemClick
,你可以叫 parent.getItemAtPosition(位置)
来获取资源ID。
The method inside your ImageAdapter called public Object getItem(int position)
should be modified to return the appropriate mImageIds[]
by using the position
argument. Then, inside onItemClick
, you can call parent.getItemAtPosition(position)
to get the resource id.
如果您要使用比IDS其他东西,方法,你可以写自己的get方法(我会打电话getResourceId),并调用((ImageAdapter)parent.getAdapter() ).getResourceId(位置))
。
If you want to use that method for things other than the ids, you can write your own get method (which I'd call getResourceId), and call ((ImageAdapter)parent.getAdapter()).getResourceId(position))
.
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