Paint.getTextBounds（）返回到大高度

Question

編輯：從仿真器的問題就來了，錯誤並沒有出現真正的設備:(

我試圖繪製自定義視圖一些文字上並且必須在那裏測量它，但Paint.getTextBounds（）的值返回的高度比實際文本高出約30％，這使得所有內容都變得古怪。

我發現這個：Android Paint: .measureText() vs .getTextBounds()並嘗試添加解決方案代碼給我自己的onDraw，看到我的測量錯誤與我的代碼相同。下面是結果圖片：

比較用： 的圖像被複制從Android Paint: .measureText() vs .getTextBounds()

注意的間距在所述第一圖像中的文本的上方。任何想法可能會造成這種情況？或者是否有其他方法來測量拉線的高度？

這裏是的onDraw方法：

@Override 
public void onDraw(Canvas canvas){ 
//  canvas.drawColor(color_Z1); 
//  r.set(0, 0, (int)(width*progress), height); 
//  paint.setColor(color_Z2); 
////  canvas.drawRect(r, paint); 
//  textPaint.getTextBounds(text, 0, text.length(), r); 
//  canvas.drawRect(r, paint); 
//  canvas.drawText(text, 0, r.height(), textPaint); 

    final String s = "Hello. I'm some text!"; 

    Paint p = new Paint(); 
    Rect bounds = new Rect(); 
    p.setTextSize(60); 

    p.getTextBounds(s, 0, s.length(), bounds); 
    float mt = p.measureText(s); 
    int bw = bounds.width(); 

    Log.i("LCG", String.format(
      "measureText %f, getTextBounds %d (%s)", 
      mt, 
      bw, bounds.toShortString()) 
    ); 
    bounds.offset(0, -bounds.top); 
    p.setStyle(Style.STROKE); 
    canvas.drawColor(0xff000080); 
    p.setColor(0xffff0000); 
    canvas.drawRect(bounds, p); 
    p.setColor(0xff00ff00); 
    canvas.drawText(s, 0, bounds.bottom, p); 
} 

Answer 1

我因此未測試的代碼，但我沒有看到有Paint.getTextBounds）的任何問題（：

public class TextBoundsTest extends View { 
    private Paint paint; 
    private Rect bounds; 

    public TextBoundsTest(Context context) { 
     super(context); 
     paint = new Paint(Paint.ANTI_ALIAS_FLAG); 
     paint.setTextSize(32); 
     bounds = new Rect(); 
    } 

    @Override 
    protected void onDraw(Canvas canvas) { 
     String text = "this is my text"; 
     paint.getTextBounds(text, 0, text.length(), bounds); 
     Log.d(TAG, "onDraw " + bounds); 

     int x = (getWidth() - bounds.width())/2; 
     int y = 70; 

     paint.setColor(0xff008800); 
     bounds.offset(x, y); 
     canvas.drawRect(bounds, paint); 

     paint.setColor(0xffeeeeee); 
     canvas.drawText(text, x, y, paint); 
    } 
} 

在Activity.onCreate補充一點：

TextBoundsTest view = new TextBoundsTest(this); 
setContentView(view); 

結果是：