Dialog 有两种使用方法：
一：在Activity中重写onCreateDialog(int id)的方法来创建Dialog的对象并返回，然后调用Activity中的showDialog(int id)和DismissDialog(int id)来显示和隐藏Dialog对话框
@Override
protected Dialog onCreateDialog(int id) {
AlertDialog.Builder dialog=null;
if(id==100){
LinearLayout ll = (LinearLayout)LayoutInflater.from(this).inflate(R.layout.picturelayout, null);
gallery = (Gallery)ll.findViewById(R.id.gallery1);
gallery.setAdapter(ia);
gallery.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,
long arg3) {
str = ia.Name(arg2);
}
});
dialog = new AlertDialog.Builder(this).setView(ll);
dialog.setPositiveButton("确定", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
}
});
dialog.setNegativeButton("取消", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
// TODO Auto-generated method stub
str=0;
}
});
}
return dialog.create();
}
用上面这种方法创建时，注意如果要创建Button的click事件的话，必须创建Builder对象，让后用Builder对象去创建Button，然后返回dialog.create();
然后在oncreate()方法中调用showDialog(100);就行。
二：直接new一个Dialog对象dialog 然后调用show()和dismiss()方法
public void check(){
AlertDialog.Builder builder = new AlertDialog.Builder(SavePictureActivity.this);
final View textEntryView = LayoutInflater.from(this).inflate(R.layout.picturelayout, null);
// LinearLayout ll = (LinearLayout)LayoutInflater.from(this).inflate(R.layout.picturelayout, null);
gallery = (Gallery)textEntryView.findViewById(R.id.gallery1);
gallery.setAdapter(ia);
gallery.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,
long arg3) {
str = ia.Name(arg2);
}
});
builder.setPositiveButton("确定", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int whichButton) {
}
});
builder.setNegativeButton("取消", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int whichButton) {
str=0;
}
});
builder.setView(textEntryView).create().show();
}
注意我刚开始创建的是Builder对象builder 直到builder.setView(textEntryView).creat() 调用了creat()才创建了Dialog的对象，然后调用show()方法显示Dialog对话框
上面创建View对象时我用了不同的方法
final View textEntryView = LayoutInflater.from(this).inflate(R.layout.picturelayout, null);
LinearLayout ll = (LinearLayout)LayoutInflater.from(this).inflate(R.layout.picturelayout, null);
两种都可以，但是推荐用第一种方法，因为第一种方法更大众一些，有时候你的布局可能不是线性布局。
Gallery的用法：
在你的调用方法或oncreate()方法中调用一下代码就行：
ImageAdapter ia = new ImageAdapter(this);
gallery = (Gallery)textEntryView.findViewById(R.id.gallery1);
gallery.setAdapter(ia);
gallery.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,
long arg3) {
str = ia.Name(arg2);
}
});
先找到控件gallery ，然后将数据放进gallery适配器中。
ImageAdapter的页面代码如下：
public class ImageAdapter extends BaseAdapter{
Context context;
public Integer[] myImageIds = {R.drawable.auto1, R.drawable.auto2,R.drawable.auto3,R.drawable.auto4,
R.drawable.auto5,R.drawable.bike,R.drawable.bike1};
public ImageAdapter(Context context){
this.context = context;
}
@Override
public int getCount() {
return myImageIds.length;
}
@Override
public Object getItem(int position) {
return position;
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
ImageView iv = new ImageView(context);
iv.setImageResource(myImageIds[position]);
iv.setScaleType(ImageView.ScaleType.FIT_XY);
iv.setLayoutParams(new Gallery.LayoutParams(136, 88));
iv.setBackgroundColor(Color.WHITE);
return iv;
}
public int Name(int id){
return myImageIds[id];
}
}
具体Gallery的各种用法可以参考博客:Android中的对话框AlertDialog使用技巧合集.