我必须在android的ListView行内绘制自定义形状。我在网上找到了这个,但没有成功。我有一个DrawView.java类,它在Canvas上制作一个矩形,我希望此类的对象包含在我的自定义ListView行中。
DrawView.java
package com.example.horizontalscrollview;
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.view.View;
public class DrawView extends View {
Paint paint = new Paint();
public DrawView(Context context) {
super(context);
}
@Override
public void onDraw(Canvas canvas) {
paint.setColor(Color.BLACK);
paint.setStrokeWidth(3);
canvas.drawRect(30, 30, 180, 180, paint);
}
}
和我的自定义ListView的行的xml文件是
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical"
android:layout_margin="60dp"
android:id="@+id/mainLayout"
>
<com.example.horizontalscrollview.DrawView
android:id="@+id/drawview"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true" >
</com.example.horizontalscrollview.DrawView>
</LinearLayout>
ListView的自定义适配器的getView()函数为:
public View getView(final int position, View convertView, final ViewGroup parent) {
Toast.makeText(c, "Clicked on="+position, 1).show();
convertView = mInflater.inflate(R.layout.news_list_item,null);
DrawView rl = (DrawView)convertView.findViewById(R.id.drawview);
DrawView draw = new DrawView(c);
rl=draw;
return convertView;
}
在您的get视图方法中将此xml充气
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical"
android:layout_margin="60dp"
android:id="@+id/mainLayout"
>
<com.example.horizontalscrollview.DrawView
android:id="@+id/drawview"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true" >
</com.example.horizontalscrollview.DrawView>
</LinearLayout>
这是获取视图方法
public View getView(final int position, View convertView, final ViewGroup parent) {
Toast.makeText(c, "Clicked on="+position, 1).show();
convertView = mInflater.inflate(R.layout.news_list_item,null);
return convertView;
}
它应该可以正常工作,如果这不起作用,请告知问题:)快乐编码
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