我正在尝试在现有的画布上添加一些红色矩形，覆盖特定的方框，就像预期结果图片中一样，但是当我部署我的应用程序时，它们根本不会出现，而是显示了当前不希望的结果。我的代码是创建顶部行上的4个矩形和底部行上的4个矩形，但我只想将其添加到2-6号方框上，但我知道需要添加额外的代码来处理1号和7号方框上的红色矩形。有人知道我做错了什么以及如何解决吗？任何帮助都将不胜感激。
"expected result"：
"current undesired outcome"：
"activity_main.xml"：
public class RectangleTextView extends View {
private final Paint mBlackPaint = new Paint();
private final Paint mRedPaint = new Paint();
private final TextPaint mTextPaint;
public RectangleTextView(Context context, AttributeSet attrs) {
super(context, attrs);
int valueInDp = (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 1, getResources().getDisplayMetrics());
int valueInSp = (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_SP, 20, getResources().getDisplayMetrics());
mRedPaint.setColor(Color.parseColor("#CC3333"));
mBlackPaint.setAntiAlias(false);
mBlackPaint.setColor(Color.BLACK);
mBlackPaint.setStrokeWidth(valueInDp);
mBlackPaint.setStyle(Paint.Style.STROKE);
mTextPaint = new TextPaint(TextPaint.ANTI_ALIAS_FLAG);
mTextPaint.setColor(Color.BLACK);
mTextPaint.setTextAlign(Paint.Align.CENTER);
mTextPaint.setTextSize(valueInSp);
mWindowPaint = new Paint();
mWindowPaint.setColor(Color.parseColor("#CC3333"));
mWindowPaint.setStrokeWidth(valueInDp);
}
private Paint mWindowPaint;
@Override protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
if (getWidth() == 0)
return;
//initialise red rectangles
int w = canvas.getWidth();
int h = canvas.getHeight();
int rectWidth = w / 5;
int space = w / 15;
int topRectHeight = getPaddingTop();
int bottomRectHeight = getPaddingBottom();
//draw end rectangles
int mSideRectWidth = 10;
canvas.drawRect(0, 0, mSideRectWidth, getHeight(), mRedPaint); //draw left end rectangle
canvas.drawRect(getWidth() - mSideRectWidth, 0, getWidth(), getHeight(), mRedPaint); //draw right end rectangle
//draw grey boxes
setBackgroundColor(Color.parseColor("#808080"));
int boxWidth = (getWidth() - mSideRectWidth) / 7;
//draw text views
for (int i = 0; i < 7; i++) {
canvas.drawText(Integer.toString(i + 1), (i * boxWidth + 10) + (boxWidth / 2), ((canvas.getHeight() / 2) - ((mTextPaint.descent() + mTextPaint.ascent()) / 2)), mTextPaint);
}
//draw black lines
for (int i = 1; i < 7; i++) {
canvas.drawLine(mSideRectWidth + boxWidth * i, 0, mSideRectWidth + boxWidth * i, getHeight(), mBlackPaint);
}
//draw red windows
for (int i = 0; i < 4; i++) {
mWindowPaint.setStyle(Paint.Style.STROKE);//add this
int left = i * (rectWidth + space);
int right = left + rectWidth;
if (i == 1){
mWindowPaint.setStyle(Paint.Style.FILL); // change to this
}
Rect rect = new Rect(left, 0, right, topRectHeight);
canvas.drawRect(rect, mWindowPaint);
Rect rect2 = new Rect(left, h - bottomRectHeight, right, h);
canvas.drawRect(rect2, mWindowPaint);
}
}
}
"expected result"：
"current undesired outcome"：
"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" android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
android:paddingBottom="@dimen/activity_vertical_margin" tools:context=".MainActivity">
<com.apptacularapps.car.RectangleTextView
android:layout_width="100dp"
android:layout_height="45dp"
android:paddingTop="10dp"
android:paddingBottom="10dp"
android:background="#808080"
android:gravity="center"/>
</RelativeLayout>
MainActivity.java
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
public class MainActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
}
