Java 按边框表示进度

我需要用视野的边界来表示进展。 例如，最初的视图根本没有边框，当进度达到50%时，只有50%的视图会有边框。找到附加的图像。 我在谷歌上搜索了很多次，但运气不好。我使用的视图是文本视图

已编辑

下面的代码，剪切位图的边。 我在这段代码中所做的是- 1.Bg设置为黑色六边形 2.我画了一个中空的绿色边框的六边形&显示这个中空的六边形，这样看起来就像是边框在堆积

public class MyView extends View {

private Bitmap mBitmap;
private Paint mPaint;
private RectF mOval;
private float mAngle = 135;
private Paint mTextPaint;
private Bitmap bgBitmap;

public MyView(Context context) {
    super(context);
    doInit();
}


/**
 * @param context
 * @param attrs
 * @param defStyleAttr
 */
public MyView(Context context, AttributeSet attrs, int defStyleAttr) {
    super(context, attrs, defStyleAttr);
    // TODO Auto-generated constructor stub
    doInit();
}


/**
 * @param context
 * @param attrs
 */
public MyView(Context context, AttributeSet attrs) {
    super(context, attrs);
    // TODO Auto-generated constructor stub
    doInit();
}

private void doInit() {
    // use your bitmap insted of R.drawable.ic_launcher
    mBitmap = BitmapFactory.decodeResource(getResources(), R.drawable.hexagon_border);
    bgBitmap = BitmapFactory.decodeResource(getResources(), R.drawable.view_message_small_hexagon);
    mPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
    mOval = new RectF();
    mTextPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
    mTextPaint.setTextSize(48);
    mTextPaint.setTextAlign(Align.CENTER);
    mTextPaint.setColor(0xffffaa00);
    mTextPaint.setTypeface(Typeface.DEFAULT_BOLD);
}

@Override
protected void onSizeChanged(int w, int h, int oldw, int oldh) {
    Matrix m = new Matrix();
    RectF src = new RectF(0, 0, mBitmap.getWidth(), mBitmap.getHeight());
    RectF dst = new RectF(0, 0, w, h);
    m.setRectToRect(src, dst, ScaleToFit.CENTER);
    Shader shader = new BitmapShader(mBitmap, TileMode.CLAMP, TileMode.CLAMP);
    shader.setLocalMatrix(m);
    mPaint.setShader(shader);
    m.mapRect(mOval, src);
}

@Override
protected void onDraw(Canvas canvas) {
    //canvas.drawColor(0xff0000aa);
    Matrix matrix = new Matrix();
    canvas.drawBitmap(bgBitmap, matrix, null);
    canvas.drawArc(mOval, -90, mAngle, true, mPaint);
}

@Override
public boolean onTouchEvent(MotionEvent event) {
    float w2 = getWidth() / 2f;
    float h2 = getHeight() / 2f;
    mAngle = (float) Math.toDegrees(Math.atan2(event.getY() - h2, event.getX() - w2));
    mAngle += 90 + 360;
    mAngle %= 360;
    invalidate();
    return true;
}

}试试：

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获得一个好的循环进度微调器本身是困难的。是一个很好的自定义

视图

。您应该能够修改的onDraw（）类，以执行与您想要的非常类似的操作。

在这里查看我的答案我已经阅读了您的代码，但不知道应该做哪些更改才能使其按预期工作。请想一想，现在您有了一个解决方案，即如何以径向方式剪裁一个位，下一步是什么？@pskink我已经编辑了我的问题。我现在面临的唯一问题是六边形的边缘被切割。你知道为什么会发生这种情况吗？我没有尝试过这个代码…但我认为这会在视图周围绘制椭圆形。对吗？它应该以椭圆形的方式显示你的位图。我不想显示图像，我想在它周围画一个边框。@VishalPawale这段代码可以满足您的需要，您只需要在代码中添加一个小东西好的……然后……我会尝试它……会根据需要进行更改并让您知道

public class MyView extends View {

    private Bitmap mBitmap;
    private Paint mPaint;
    private RectF mOval;
    private float mAngle = 135;
    private Paint mTextPaint;

    public MyView(Context context) {
        super(context);
        // use your bitmap insted of R.drawable.ic_launcher
        mBitmap = BitmapFactory.decodeResource(getResources(), R.drawable.ic_launcher);
        mPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
        mOval = new RectF();
        mTextPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
        mTextPaint.setTextSize(48);
        mTextPaint.setTextAlign(Align.CENTER);
        mTextPaint.setColor(0xffffaa00);
        mTextPaint.setTypeface(Typeface.DEFAULT_BOLD);
    }

    @Override
    protected void onSizeChanged(int w, int h, int oldw, int oldh) {
        Matrix m = new Matrix();
        RectF src = new RectF(0, 0, mBitmap.getWidth(), mBitmap.getHeight());
        RectF dst = new RectF(0, 0, w, h);
        m.setRectToRect(src, dst, ScaleToFit.CENTER);
        Shader shader = new BitmapShader(mBitmap, TileMode.CLAMP, TileMode.CLAMP);
        shader.setLocalMatrix(m);
        mPaint.setShader(shader);
        m.mapRect(mOval, src);
    }

    @Override
    protected void onDraw(Canvas canvas) {
        canvas.drawColor(0xff0000aa);
        canvas.drawArc(mOval, -90, mAngle, true, mPaint);
        canvas.drawText("click me", getWidth() / 2, getHeight() / 2, mTextPaint);
    }

    @Override
    public boolean onTouchEvent(MotionEvent event) {
        float w2 = getWidth() / 2f;
        float h2 = getHeight() / 2f;
        mAngle = (float) Math.toDegrees(Math.atan2(event.getY() - h2, event.getX() - w2));
        mAngle += 90 + 360;
        mAngle %= 360;
        invalidate();
        return true;
    }
}