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我试图构建我的第一个自定义gui元素,但当我尝试在代码中稍后更改外观或适配器(使用Gallery)时遇到问题。充气自定义图库布局更改属性失败
我的问题:我不能改变自定义画廊性质
我的实际代码:
首先我创建一个XML这是小工具customGallery.xml
<?xml version="1.0" encoding="utf-8"?>
<merge xmlns:android="http://schemas.android.com/apk/res/android">
<ImageButton android:id="@+id/toLeft"
android:background="@drawable/arrow_left"
android:layout_width="wrap_content"
android:layout_height="40dip"
android:layout_marginBottom="1dip" />
<Gallery
android:id="@+id/gallery"
android:layout_width="fill_parent"
android:layout_height="40dip"
android:layout_toRightOf="@+id/toLeft"
android:spacing="40dip"
android:scrollbars="horizontal"/>
<ImageButton android:id="@+id/toRight"
android:background="@drawable/arrow_right"
android:layout_width="wrap_content"
android:layout_height="40dip"
android:layout_toRightOf="@+id/gallery" />
</merge>
后来我创建test.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayoutxmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/lin_layout"
android:orientation="horizontal"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<com.Test.GallerySlider
android:id="@+id/choose"
android:layout_span="2"
android:layout_width="300dip"
android:layout_height="wrap_content" />
</LinearLayout>
我的下一步是包含此自定义控件到我的项目,并从我的窗口小部件更改适配器:
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
LinearLayout lineLayout = (LinearLayout) findViewById(R.id.lin_layout);
ViewStub st3 = new ViewStub(TestwidgetActivity.this);
LinearLayout.LayoutParams paramst3 = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.WRAP_CONTENT, LinearLayout.LayoutParams.WRAP_CONTENT);
lineLayout.addView(st3,paramst3);
st3.setLayoutResource(R.layout.test);
View st3InflaView =st3.inflate();
GallerySlider gSlider= (GallerySlider) st3InflaView.findViewById(R.id.choose);
gSlider.setNewAdapter(new ArrayAdapter<String>(this, android.R.layout.customGallery, new String[] {"1 ","2","3","4"}));
}
这是Widgetclass我写道:
public class GallerySlider extends RelativeLayout implements OnClickListener {
private ArrayAdapter<String> adapter;
private Gallery gallery;
private ImageButton toLeftBtn = null;
private ImageButton toRightbtn = null;
public GallerySlider(Context context) {
super(context, null);
init(context);
}
public GallerySlider(Context context, AttributeSet attrs) {
super(context, attrs);
init(context);
}
public GallerySlider(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs);
init(context);
}
public void init(Context ctx){
LayoutInflater inflater = (LayoutInflater) ctx.getSystemService(Context.LAYOUT_INFLATER_SERVICE) ;
inflater.inflate(R.layout.customGallery, this, true);
toLeftBtn = (ImageButton) findViewById(R.id.toLeft);
toLeftBtn.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
if(gallery.getSelectedItemPosition() > 0){
gallery.setSelection(gallery.getSelectedItemPosition()-1);
}
}
});
toRightbtn = (ImageButton) findViewById(R.id.toRight);
toRightbtn.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
if(gallery.getSelectedItemPosition() < gallery.getAdapter().getCount()-1){
gallery.setSelection(gallery.getSelectedItemPosition()+1);
}
}
});
adapter = new ArrayAdapter<String>(ctx, android.R.layout.simple_gallery_item, new String[] {"1","1",
"1")});
gallery = (Gallery) findViewById(R.id.gallery);
gallery.setBackgroundResource(R.drawable.h_sliderl);
gallery.setAdapter(adapter);
}
@Override
public void onClick(DialogInterface dialog, int which) {
switch(which){
case R.id.toLeft: gallery.setSelection(gallery.getFocusedChild().getId()-1);
break;
case R.id.toRight: gallery.setSelection(gallery.getFocusedChild().getId()+1);
break;
}
}
public void setNewAdapter(ArrayAdapter<String> _adapter){
gallery.setAdapter(_adapter);
((ArrayAdapter) gallery.getAdapter()).notifyDataSetChanged();
}
}
如果我打电话setNewAdapter(ArrayAdapter _adapter)没有什么变化..。我也试图改变画廊的大小,但它也失败了(nothig发生)。我的方法是否为假?
问候马塞尔
你好,我改变这一点。但调用setnewAdapter()没有什么变化的问题是实际存在的..我认为notyfiyDataSetChange将解决问题。任何想法? – marcel
@marcel:Plz,使用更新修改您的问题中的代码。 – Macarse
你好,我是sry ..我发现我的错误我现在使用查看st3InflaView = st3.inflate(); GallerySlider gSlider =(GallerySlider)st3InflaView.findViewById(R.id.choose);感谢您指点方向.... – marcel