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Đăng Nhập![[Android] Gallery show image Empty](https://2img.net/i/empty.gif)
Mon May 26, 2014 10:04 am
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Ngăn cấmDemo project [You must be registered and logged in to see this link.]
![[Android] Gallery show image V92ggNc](https://i.imgur.com/v92ggNc.png)
GalleryAdapter.java
- Spoiler:
import java.util.List;
import android.app.Activity;
import android.graphics.drawable.Drawable;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.Gallery;
import android.widget.ImageView;
public class GalleryAdapter extends BaseAdapter{
private Activity context;
private List<Drawable> listDrawables;
public GalleryAdapter (Activity conActivity, List<Drawable> listDrawables){
this.context = conActivity;
this.listDrawables = listDrawables;
}
@Override
public int getCount() {
// TODO Auto-generated method stub
return listDrawables.size();
}
@Override
public Object getItem(int arg0) {
// TODO Auto-generated method stub
return null;
}
@Override
public long getItemId(int arg0) {
// TODO Auto-generated method stub
return 0;
}
@Override
public View getView(int arg0, View arg1, ViewGroup arg2) {
// TODO Auto-generated method stub
LayoutInflater inflater =context.getLayoutInflater();
View view = inflater.inflate(R.layout.items_gallery, null);
ImageView imageView = (ImageView)view.findViewById(R.id.imageItemsGallery);
imageView.setImageDrawable(listDrawables.get(arg0));
//cho kich thuoc hinh anh bang nhau
imageView.setScaleType(ImageView.ScaleType.FIT_XY);
imageView.setLayoutParams(new Gallery.LayoutParams(150,90));// khoi sai
return imageView;
}
}
- Spoiler:
- import java.util.ArrayList;
import java.util.List;
import android.os.Bundle;
import android.app.Activity;
import android.graphics.Bitmap;
import android.graphics.drawable.BitmapDrawable;
import android.graphics.drawable.Drawable;
import android.view.Menu;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemSelectedListener;
import android.widget.Gallery;
import android.widget.ImageView;
import android.widget.ImageView.ScaleType;
public class DemoGallery extends Activity {
private List<Drawable> drawables ;
private GalleryAdapter galleryAdapter ;
private Gallery gallery ;
private int selectedImagePosition = 0;
//khai bao imageview tren nay thi moi hien thi duoc, neu khai bao trong setOnItem.. thi ko hien thi
ImageView imageView ;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_demo_gallery);
getDrawableList();
GalleryUI();
imageView= (ImageView) findViewById(R.id.imageItems);
}
// dua vao mang
private void getDrawableList(){
drawables = new ArrayList<Drawable>();
drawables.add(getResources().getDrawable(R.drawable.image1));
drawables.add(getResources().getDrawable(R.drawable.image2));
drawables.add(getResources().getDrawable(R.drawable.image3));
drawables.add(getResources().getDrawable(R.drawable.image4));
drawables.add(getResources().getDrawable(R.drawable.image5));
}
private void GalleryUI(){
gallery = (Gallery) findViewById(R.id.gallery1);
galleryAdapter = new GalleryAdapter(this, drawables);
gallery.setAdapter(galleryAdapter);
//hien thi hinh anh len image chinh khi gallery selected
gallery.setOnItemSelectedListener(new OnItemSelectedListener() {
@Override
public void onItemSelected(AdapterView<?> arg0, View arg1,
int arg2, long arg3) {
// TODO Auto-generated method stub
// hien thi anh len imageItems
BitmapDrawable bitmapDrawable = (BitmapDrawable)drawables.get(arg2);
Bitmap bitmap = Bitmap.createScaledBitmap(bitmapDrawable.getBitmap(), (int) (bitmapDrawable.getIntrinsicHeight()*0.9), (int)(bitmapDrawable.getIntrinsicWidth()*0.7), false);
imageView.setImageBitmap(bitmap);
imageView.setScaleType(ScaleType.FIT_XY);
}
@Override
public void onNothingSelected(AdapterView<?> arg0) {
// TODO Auto-generated method stub
}
});
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.demo_gallery, menu);
return true;
}
}
- Code:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<ImageView
android:id="@+id/imageItemsGallery"
android:layout_width="50dp"
android:layout_height="100dp"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:layout_marginTop="17dp"
android:src="@drawable/ic_launcher" />
</LinearLayout>
- Code:
<LinearLayout 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"
android:orientation="vertical"
tools:context=".DemoGallery" >
<Gallery
android:id="@+id/gallery1"
android:layout_width="200dp"
android:layout_height="100dp"
android:layout_marginLeft="20dip"
android:layout_marginRight="20dip"
android:spacing="20dip"
android:layout_alignParentBottom="true"
android:layout_alignParentLeft="true" />
<ImageView
android:id="@+id/imageItems"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:layout_marginTop="17dp"
android:src="@drawable/ic_launcher" />
</LinearLayout>