相关疑难解决方法(0)

我有三个文件.XML,绘图函数和主Activity.LinearLayout我的XML文件中有一些.

<LinearLayout android:orientation="horizontal"
              android:layout_width="fill_parent"
              android:layout_height="fill_parent"
              android:layout_weight="1">
    <LinearLayout android:layout_width="fill_parent"
                  android:layout_height="fill_parent"
                  android:layout_weight="1"
                  android:background="#ef3"
                  android:id="@+id/img01"/>
    <LinearLayout android:layout_width="fill_parent"
                  android:layout_height="fill_parent"
                  android:layout_weight="1"
                  android:background="#E8A2B4"
                  android:id="@+id/img02"/>
</LinearLayout>

这是绘图功能:

public class getBorder extends TextView {
    public getBorder(Context context) {
        super(context);
    }

    @Override
    protected void onDraw(Canvas canvas) {
        super.onDraw(canvas);
        Paint paint = new Paint();

        paint.setColor(android.graphics.Color.RED);

        canvas.drawLine(0, 0, this.getWidth() - 1, 0, paint);
        canvas.drawLine(0, 0, 0, this.getHeight() - 1, paint);
        canvas.drawLine(this.getWidth() - 1, 0, this.getWidth() - 1,
            this.getHeight() - 1, paint);
        canvas.drawLine(0, this.getHeight() - 1, this.getWidth() - 1,
            this.getHeight() …