Java 如何向GridView单元格添加标题
大家好,我正在使用Android的GridView工具将图像显示为菜单 我在一个名为ImageAdapter Extendes BaseAdapter的类中使用此代码 我用过下面的代码Java 如何向GridView单元格添加标题,java,android,image,gridview,text,Java,Android,Image,Gridview,Text,大家好,我正在使用Android的GridView工具将图像显示为菜单 我在一个名为ImageAdapter Extendes BaseAdapter的类中使用此代码 我用过下面的代码 package com.example.gridviewtest; import com.example.gridviewtest.R; import android.view.View; import android.view.ViewGroup; import android.widget.BaseAdap
package com.example.gridviewtest;
import com.example.gridviewtest.R;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.content.Context;
import android.widget.GridView;
import android.widget.ImageView;
public class ImageAdapter extends BaseAdapter {
private Context mContext;
public Integer[] mThumbIds =
{
R.drawable.pic1, R.drawable.pic2, R.drawable.pic3,
R.drawable.pic4, R.drawable.pic5, R.drawable.pic6,
R.drawable.pic7, R.drawable.pic8, R.drawable.pic9
};
public ImageAdapter(Context c){
mContext = c;
}
@Override
public int getCount() {
return mThumbIds.length;
}
@Override
public Object getItem(int position) {
return mThumbIds[position];
}
@Override
public long getItemId(int position) {
return 0;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
ImageView imageView = new ImageView(mContext);
imageView.setImageResource(mThumbIds[position]);
imageView.setScaleType(ImageView.ScaleType.CENTER_CROP);
imageView.setLayoutParams(new GridView.LayoutParams(200, 200));
return imageView;
}
}
我试着使用
imageView.setText("Something");
但这对我不起作用
需要在单元格中的图片下添加标题
你能帮我一下吗
向您致意…您可以将自定义适配器用作listView:
public class CustomAdapter extends ArrayAdapter<Integer> {
Activity context;
ArrayList<Integer> objects;
public CustomAdapter(Activity context, ArrayList<Integer> objects) {
super(context, R.layout.row, objects);
this.context = context;
this.objects = objects;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
if (convertView == null) {
LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView = inflater.inflate(R.layout.row, parent, false);
}
ImageView i = (ImageView) convertView.findViewById(R.id.icon);
i.setBackgroundResource(objects.get(position));
TextView t = (TextView) convertView.findViewById(R.id.title);
t.setText("title");
return convertView;
}
}
编辑2:添加一段功能代码
activity_main.xml
<RelativeLayout 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"
tools:context=".MainActivity" >
<GridView
android:id="@+id/grid_view"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:numColumns="3"
android:gravity="center_horizontal"
android:horizontalSpacing="10dp"
android:verticalSpacing="10dp"
android:padding="10dp"
android:background="#600000ff"
/>
</RelativeLayout>
grid\u item\u layout.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical"
android:background="#6000ff00"
android:padding="4dp">
<TextView
android:id="@+id/label"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="label"
android:layout_gravity="center_horizontal"/>
<FrameLayout
android:id="@+id/holder"
android:layout_width="100dp"
android:layout_height="100dp">
<ImageView
android:id="@+id/image"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:scaleType="centerCrop"/>
</FrameLayout>
</LinearLayout>
CustomAdapter.class
public class CustomAdapter extends ArrayAdapter<Integer> {
private Activity context;
private ArrayList<Integer> objects;
public CustomAdapter(Activity context, ArrayList<Integer> objects) {
super(context, R.layout.grid_item_layout, objects);
this.context = context;
this.objects = objects;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
if(convertView == null){
LayoutInflater i = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView = (View) i.inflate(R.layout.grid_item_layout, parent, false);
}
TextView t = (TextView) convertView.findViewById(R.id.label);
ImageView i = (ImageView) convertView.findViewById(R.id.image);
t.setText("label " + position);
i.setImageResource(objects.get(position));
return convertView;
}
主要活动
public class MainActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
GridView g = (GridView) findViewById(R.id.grid_view);
CustomAdapter adapter = new CustomAdapter(this, getData());
g.setAdapter(adapter);
}
public ArrayList<Integer> getData(){
ArrayList<Integer> list = new ArrayList<Integer>();
list.add(R.drawable.pic1);
// add 2 - 11
list.add(R.drawable.pic12);
return list;
}
}
最终外观:
注意:根据我的经验,当gridView中有很多图片时,滚动会变得缓慢和滞后,但这不是您的问题主题,因此,如果这也是一个问题,请参见您可以使用自定义适配器作为listView:
public class CustomAdapter extends ArrayAdapter<Integer> {
Activity context;
ArrayList<Integer> objects;
public CustomAdapter(Activity context, ArrayList<Integer> objects) {
super(context, R.layout.row, objects);
this.context = context;
this.objects = objects;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
if (convertView == null) {
LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView = inflater.inflate(R.layout.row, parent, false);
}
ImageView i = (ImageView) convertView.findViewById(R.id.icon);
i.setBackgroundResource(objects.get(position));
TextView t = (TextView) convertView.findViewById(R.id.title);
t.setText("title");
return convertView;
}
}
编辑2:添加一段功能代码
activity_main.xml
<RelativeLayout 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"
tools:context=".MainActivity" >
<GridView
android:id="@+id/grid_view"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:numColumns="3"
android:gravity="center_horizontal"
android:horizontalSpacing="10dp"
android:verticalSpacing="10dp"
android:padding="10dp"
android:background="#600000ff"
/>
</RelativeLayout>
grid\u item\u layout.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical"
android:background="#6000ff00"
android:padding="4dp">
<TextView
android:id="@+id/label"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="label"
android:layout_gravity="center_horizontal"/>
<FrameLayout
android:id="@+id/holder"
android:layout_width="100dp"
android:layout_height="100dp">
<ImageView
android:id="@+id/image"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:scaleType="centerCrop"/>
</FrameLayout>
</LinearLayout>
CustomAdapter.class
public class CustomAdapter extends ArrayAdapter<Integer> {
private Activity context;
private ArrayList<Integer> objects;
public CustomAdapter(Activity context, ArrayList<Integer> objects) {
super(context, R.layout.grid_item_layout, objects);
this.context = context;
this.objects = objects;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
if(convertView == null){
LayoutInflater i = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView = (View) i.inflate(R.layout.grid_item_layout, parent, false);
}
TextView t = (TextView) convertView.findViewById(R.id.label);
ImageView i = (ImageView) convertView.findViewById(R.id.image);
t.setText("label " + position);
i.setImageResource(objects.get(position));
return convertView;
}
主要活动
public class MainActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
GridView g = (GridView) findViewById(R.id.grid_view);
CustomAdapter adapter = new CustomAdapter(this, getData());
g.setAdapter(adapter);
}
public ArrayList<Integer> getData(){
ArrayList<Integer> list = new ArrayList<Integer>();
list.add(R.drawable.pic1);
// add 2 - 11
list.add(R.drawable.pic12);
return list;
}
}
最终外观:
注意:根据我的经验,当gridView中有很多图片时,滚动会变得缓慢和滞后,但这不是您的问题主题,因此,如果这也是一个问题,请参见@Metalhead1247 LoL:@Metalhead1247 LoL:谢谢,但您能解释一下我现在能做些什么吗,,你的意思是我应该用你放的这个来替换我的类还是什么?@lo2i更新了答案,希望代码能理解它。如果没有,请询问。斯潘蒂,非常感谢,现在我很好用。但我有一个问题,我如何为每张图片定义一个文本,因为我只能像这样将图片绑定到列表中。addR.drawable.pic1@lo2i只需在对象上创建,该对象将包含int-resource_-id和字符串标签;然后你会扩展ArrayAdapter,你的列表也会是ArrayList谢谢,但是你能解释一下我现在能做什么吗,,你是说我应该用你放的这个类替换我的类还是什么?@lo2i更新了答案,希望代码能理解它。如果没有,请询问。斯潘蒂,非常感谢,现在我很好用。但我有一个问题,我如何为每张图片定义一个文本,因为我只能像这样将图片绑定到列表中。addR.drawable.pic1@lo2i只需在对象上创建,该对象将包含int-resource_-id和字符串标签;然后您将扩展ArrayAdapter,并且您的列表也将是ArrayList