Question

目前我正在对Android进行一些更改。它目前在纵向模式下工作得很好，但在横向模式下却不行。问题是，在横向模式下，我的画布上的文字超出了屏幕的高度（因此，它不可读）。如果画布大小超过屏幕大小，我需要在画布上添加滚动。（我已经对.xml进行了更改以使布局成为scrollView，但它没有帮助，因为画布设置为屏幕的大小，而不是它的大小）

我会粘贴整个班级，但重要的部分是onDraw。此类用于主要活动，然后是主要活动。问题很简单。如果画布大于屏幕，有没有办法动态添加滚动？或者我应该使用另一个活动来编写结果和画布仅用于绘图？如果需要，这里链接到整个项目，并且有所有代码的zip（应用程序真的不是那么大）： http://www.yorku.ca/mack/FittsLawSoftware/

package ca.yorku.cse.mack.fittstouch;

import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.util.AttributeSet;
import android.view.View;
import android.widget.Toast;

public class ExperimentPanel extends View
{
final int START_TEXT_SIZE = 20; // may need to fiddle with this,    depending on device
final int START_CICLE_DIAMETER = 53; // x pixelDensity = one-third inch
final int GAP_BETWEEN_LINES = 6;

Target[] targetSet;
Target toTarget; // the target to select
Target fromTarget; // the source target from where the trial began
Target startCircle;

float panelWidth;
float panelHeight;

float d; // diameter of start circle (also used for positioning circle and text)
float textSize;
float gap;

boolean waitStartCircleSelect, done;
String mode;
Paint targetPaint, targetRimPaint, normalPaint, startPaint;
String[] resultsString = {"Tap to begin"};

public ExperimentPanel(Context contextArg)
{
    super(contextArg);
    initialize(contextArg);
}

public ExperimentPanel(Context contextArg, AttributeSet attrs)
{
    super(contextArg, attrs);
    initialize(contextArg);
}

public ExperimentPanel(Context contextArg, AttributeSet attrs, int defStyle)
{
    super(contextArg, attrs, defStyle);
    initialize(contextArg);
}

// things that can be initialized from within this View
private void initialize(Context c)
{
    this.setBackgroundColor(Color.LTGRAY);

    float pixelDensity = c.getResources().getDisplayMetrics().density;
    d = START_CICLE_DIAMETER * pixelDensity;
    startCircle = new Target(Target.CIRCLE, d, d, d, d, Target.NORMAL);
    textSize = START_TEXT_SIZE * pixelDensity;
    gap = GAP_BETWEEN_LINES * pixelDensity;

    targetPaint = new Paint();
    targetPaint.setColor(0xffffaaaa);
    targetPaint.setStyle(Paint.Style.FILL);
    targetPaint.setAntiAlias(true);

    targetRimPaint = new Paint();
    targetRimPaint.setColor(Color.RED);
    targetRimPaint.setStyle(Paint.Style.STROKE);
    targetRimPaint.setStrokeWidth(2);
    targetRimPaint.setAntiAlias(true);

    normalPaint = new Paint();
    normalPaint.setColor(0xffff9999); // lighter red (to minimize distraction)
    normalPaint.setStyle(Paint.Style.STROKE);
    normalPaint.setStrokeWidth(2);
    normalPaint.setAntiAlias(true);

    startPaint = new Paint();
    startPaint.setColor(0xff0000ff);
    startPaint.setStyle(Paint.Style.FILL);
    startPaint.setAntiAlias(true);
    startPaint.setTextSize(textSize);
}

@Override
protected void onDraw(Canvas canvas)
{
    int tmp1=0;
    float tmp2 =0;
    if (waitStartCircleSelect) // draw start circle and prompt/results string
    {
        canvas.drawCircle(startCircle.xCenter, startCircle.yCenter, startCircle.width / 2f,
                startPaint);
        for (int i = 0; i < resultsString.length; ++i){
            canvas.drawText(resultsString[i], d / 2, d / 2 + 2 * startCircle.width / 2f + (i + 1) * (textSize + gap), startPaint);
            tmp1=i;
        }

    } else if (!done) // draw task targets
    {

        for (Target value : targetSet)
        {
            if (mode.equals("1D"))
                canvas.drawRect(value.r, normalPaint);
            else // 2D
                canvas.drawOval(value.r, normalPaint);
        }

        // draw target to select last (so it is on top of any overlapping targets)
        if (mode.equals("1D"))
        {
            canvas.drawRect(toTarget.r, targetPaint);
            canvas.drawRect(toTarget.r, targetRimPaint);
        } else // 2D
        {
            canvas.drawOval(toTarget.r, targetPaint);
            canvas.drawOval(toTarget.r, targetRimPaint);
        }
    }
    invalidate(); // will cause onDraw to run again immediately
}

@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec)
{
    setMeasuredDimension((int) panelWidth, (int) panelHeight);
}
}

Android - 如果画布超出屏幕高度

0 个答案: