Android 如何在gallery中添加按钮
我的应用程序在图库中包含一些图片。我想添加一个按钮,该按钮随相应的选定图像而变化。我在早期阶段。如何在项目中添加此代码 代码如下:Android 如何在gallery中添加按钮,android,android-layout,android-intent,Android,Android Layout,Android Intent,我的应用程序在图库中包含一些图片。我想添加一个按钮,该按钮随相应的选定图像而变化。我在早期阶段。如何在项目中添加此代码 代码如下: import android.app.Activity; import android.content.Context; import android.content.res.TypedArray; import android.os.Bundle; import android.view.View; import android.view.ViewGroup; i
import android.app.Activity;
import android.content.Context;
import android.content.res.TypedArray;
import android.os.Bundle;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.BaseAdapter;
import android.widget.Gallery;
import android.widget.ImageView;
import android.widget.Toast;
import android.widget.AdapterView.OnItemClickListener;
public class GalleryView extends Activity {
Integer[] pics = {
R.drawable.antartica1,
R.drawable.antartica2,
R.drawable.antartica3,
R.drawable.antartica4,
R.drawable.antartica5,
R.drawable.antartica6,
R.drawable.antartica7,
R.drawable.antartica8,
R.drawable.antartica9,
R.drawable.antartica10
};
ImageView imageView;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
Gallery ga = (Gallery)findViewById(R.id.Gallery01);
ga.setAdapter(new ImageAdapter(this));
imageView = (ImageView)findViewById(R.id.ImageView01);
ga.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,
long arg3) {
Toast.makeText(getBaseContext(),
"You have selected picture " + (arg2+1) + " of Antartica",
Toast.LENGTH_SHORT).show();
imageView.setImageResource(pics[arg2]);
}
});
}
public class ImageAdapter extends BaseAdapter {
private Context ctx;
int imageBackground;
public ImageAdapter(Context c) {
ctx = c;
TypedArray ta = obtainStyledAttributes(R.styleable.Gallery1);
imageBackground = ta.getResourceId(R.styleable.Gallery1_android_galleryItemBackground, 1);
ta.recycle();
}
public int getCount() {
return pics.length;
}
public Object getItem(int arg0) {
return arg0;
}
public long getItemId(int arg0) {
return arg0;
}
public View getView(int arg0, View arg1, ViewGroup arg2) {
ImageView iv = new ImageView(ctx);
iv.setImageResource(pics[arg0]);
iv.setScaleType(ImageView.ScaleType.FIT_XY);
iv.setLayoutParams(new Gallery.LayoutParams(150,120));
iv.setBackgroundResource(imageBackground);
return iv;
}
}
}
导入android.app.Activity;
导入android.content.Context;
导入android.content.res.TypedArray;
导入android.os.Bundle;
导入android.view.view;
导入android.view.ViewGroup;
导入android.widget.AdapterView;
导入android.widget.BaseAdapter;
导入android.widget.Gallery;
导入android.widget.ImageView;
导入android.widget.Toast;
导入android.widget.AdapterView.OnItemClickListener;
公共类GalleryView扩展活动{
整数[]pics={
R.drawable.antartica1,
R.drawable.antartica2,
R.drawable.antartica3,
R.drawable.antartica4,
R.drawable.antartica5,
R.drawable.antartica6,
R.drawable.antartica7,
R.drawable.antartica8,
R.drawable.antartica9,
R.可牵引的
};
图像视图图像视图;
/**在首次创建活动时调用*/
@凌驾
创建时的公共void(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
画廊ga=(画廊)findViewById(R.id.Gallery01);
ga.setAdapter(新的ImageAdapter(this));
imageView=(imageView)findViewById(R.id.ImageView01);
ga.setOnItemClickListener(新的OnItemClickListener(){
公共链接(AdapterView arg0、视图arg1、内部arg2、,
长arg3){
Toast.makeText(getBaseContext(),
“您已选择Antartica的图片”+(arg2+1)+”,
吐司。长度(短)。show();
setImageResource(pics[arg2]);
}
});
}
公共类ImageAdapter扩展了BaseAdapter{
私有上下文ctx;
int图像背景;
公共图像适配器(上下文c){
ctx=c;
TypedArray ta=获得的StyledAttributes(R.styleable.Gallery1);
imageBackground=ta.getResourceId(R.styleable.Gallery1\u android\u galleryItemBackground,1);
ta.recycle();
}
public int getCount(){
返回图片长度;
}
公共对象getItem(int arg0){
返回arg0;
}
公共长getItemId(int arg0){
返回arg0;
}
公共视图getView(int arg0、视图arg1、视图组arg2){
ImageView iv=新的ImageView(ctx);
iv.setImageResource(pics[arg0]);
iv.setScaleType(ImageView.ScaleType.FIT_XY);
iv.设置布局参数(新画廊布局参数(150120));
iv.挫折背景资源(图像背景);
回报四;
}
}
}
Xml:
谢谢我不确定我是否理解您的意思,但是如果您希望在选择gallery项目时设置
ImageView
的图像,您应该像这样使用setOnItemSelectedListener
ga.setOnItemSelectedListener(new OnItemSelectedListener() {
@Override
public void onItemSelected(AdapterView<?> arg0, View arg1,
int position, long arg3) {
imageView01.setImageBitmap(pics[position});
}
@Override
public void onNothingSelected(AdapterView<?> arg0) {}
});
ga.setOnItemSelectedListener(新的OnItemSelectedListener(){
@凌驾
已选择公共视图(AdapterView arg0、视图arg1、,
整数位置,长arg3){
imageView01.setImageBitmap(pics[position});
}
@凌驾
未选择的公共无效(AdapterView arg0){}
});
ga.setOnItemSelectedListener(new OnItemSelectedListener() {
@Override
public void onItemSelected(AdapterView<?> arg0, View arg1,
int position, long arg3) {
imageView01.setImageBitmap(pics[position});
}
@Override
public void onNothingSelected(AdapterView<?> arg0) {}
});