Emergency! The problem has not been resolved, drawText method has no effect

            
First on the code

 
package org.example.guessdigit; 

import java.util.ArrayList; 

import android.content.Context; 
import android.graphics.Canvas; 
import android.graphics.Paint; 
import android.graphics.Paint.Style; 
import android.util.Log; 
import android.view.ViewTreeObserver; 
import android.widget.ImageView; 
import android.widget.LinearLayout; 

public class PuzzleView extends LinearLayout {
private int num; / / the number of digit you entered 
private int diff; 
int temp; / / the number you enter you entered 
private Game game; 
/ / Private float width; / / width of one tile 
/ / Private float height; / / height of one tile 
private int selX; / / X index of selection 
private int selY; / / Y index of selection 
/ / Private ArrayList  tiles; 
private Paint background; 
private int imageHeight; 
private int imageWidth; 
private Canvas c = new Canvas (); 
/ / Private LinearLayout layout; 
/ / Private static final int ID = R.id.puzzleview; 

LayoutParams params = 
new LinearLayout.LayoutParams (
LayoutParams.FILL_PARENT, 
LayoutParams.WRAP_CONTENT, 
(Float) 1.0); 

public PuzzleView (Context context) {
super (context); 
/ / TODO Auto-generated constructor stub 
this.game = (Game) context; 
diff = game.getDiff (); 
/ / Tiles = new ArrayList  (); 
background = new Paint (); 
background.setColor (getResources (). getColor (
R.color.puzzle_background)); 


/ / SetId (ID); 
initTiles (); 
} 

public void setWH () {
final ImageView img = (ImageView) this.getChildAt (0); 
ViewTreeObserver treeObsObj = img.getViewTreeObserver (); 
treeObsObj.addOnPreDrawListener (
new ViewTreeObserver.OnPreDrawListener () {

@ Override 
public boolean onPreDraw () {
/ / TODO Auto-generated method stub 
imageWidth = img.getMeasuredWidth (); 
imageHeight = img.getMeasuredHeight (); 
return true; 
} 
}); 
} 

protected void drawDigit (Canvas canvas, int digit) {
/ / TODO Auto-generated method stub 
if (num ImageView img = (ImageView) this.getChildAt (num); 
int x = this.getChildAt (num) getLeft ();. / / Get the X coordinate ImageView results 0 
int y = this.getChildAt (num) getTop ();. / / Get the Y coordinate ImageView results 0 
int w = imageWidth; 
int h = imageHeight; 
Log.d ("puzzlve_width", this.getWidth () + ""); / / get the LinearLayout's width is 480 
Log.d ("puzzlve_height", this.getHeight () + "") ;/ / the LinearLayout's Height is 63 
System.out.println ("Image Height:" + imageHeight); 
/ / Height = this.getHeight (); 
/ / Width = this.getWidth (); 

/ / Background.setTextSize (h * 0.75f); 
/ / Background.setStyle (Style.FILL); 
/ / Background.setTextScaleX (w / h); 
/ / Background.setTextAlign (Paint.Align.CENTER); 
canvas.drawText (digit + "", 20, 10, background); / / Why this method has no effect 
 drawTextnum + +; 
} 
} 

@ Override 
protected void onDraw (Canvas canvas) {
/ / TODO Auto-generated method stub 
/ / DrawDigit (canvas, temp); 
} 

/ / Set the number you entered 
public void addNumber (int i) {
if (num this.removeViewAt (num); 
this.addView (getImg1 (), num); 
if (num this.removeViewAt (num + 1); 
this.addView (getImg2 (), num + 1); 
/ / Temp = i; 
drawDigit (c, i); 
return; 
/ / Num + +; 
} 
/ / Temp = i; 
drawDigit (c, i); 
} 
} 

/ / Img 
 after the electionpublic ImageView getImg2 () {
ImageView i = new ImageView (game); 
i.setImageResource (R.drawable.login_input); 
i.setLayoutParams (params); 

return i; 
} 

/ Img 
 / current selectionpublic ImageView getImg1 () {
ImageView i = new ImageView (game); 
i.setImageResource (R.drawable.input_over); 
i.setLayoutParams (params); 
return i; 
} 

private void initTiles () {
this.addView (getImg2 ()); 
/ / Tiles.add (getImg2 ()); 
this.setLayoutParams (new LayoutParams (params)); 
this.setOrientation (LinearLayout.HORIZONTAL); 

for (int i = 1; i / / Tiles.add (getImg1 ()); 
this.addView (getImg1 ()); 
} 
setWH (); 
} 

@ Override 
protected void onSizeChanged (int w, int h, int oldw, int oldh) {
/ / TODO Auto-generated method stub 
super.onSizeChanged (w, h, oldw, oldh); 
} 
} 

I guess the problem has two, one is the coordinates and size of the ImageView in LinearLayout class access are 0
Another method is the Canvas drawText no effect, my LinearLayout's width is 480, height is 63
However drawText (s, 20, 10, background); method has no effect
I wanted to call based on the location ImageView drawText, unfortunately coordinates are 0
Later, I used the specified coordinates (20,10) have no effect, does not display the string
Seeking heroes! ! ! Thank you first
Reply:
No people? Sofa he sat
Reply:

The reply was deleted administrator at 2012-12-08 14:13:04

Reply:
No people? Seeking help
Reply:
Do not sink ah! Seeking to explain why there is no effect drawtext methods
Reply:
See the background color you use to drawtext, the color will not be a problem ah
Reply:

The reply was deleted administrator at 2012-11-26 10:17:12

Reply:

references, 5th Floor windspeaker reply:

see the background color you use to drawtext, the color will not be a problem ah

not color problems
Reply:
Look at your code drawDigit not called in onDraw, ah, you have to call in the job onDraw
Reply:
I have encountered this problem. drawText, drawBitmap .. all the painting had no effect.
@ Override
protected void onDraw (Canvas canvas) {
/ / TODO Auto-generated method stub
super.onDraw (canvas);
System.out.println ("BublleTextView> onDraw ----------------------");
Drawable drawable = this.getResources (). GetDrawable (
R.drawable.ic_launcher);
Bitmap mBitmap = ((BitmapDrawable) drawable) getBitmap ();.
canvas.drawBitmap (mBitmap, 0, 0, null) ;/ / start drawing in 0,0 coordinates into the original image src
/ / Draw the progress
int width = getWidth ();
int height = getHeight ();
mPaint.setTypeface (Typeface.defaultFromStyle (Typeface.BOLD));
mPaint.setColor (Color.BLACK);
mPaint.setTextSize (30);
canvas.drawText ("ddddddddddddddddddddddddddddddddddddddddd", 1, 1,
mPaint);
mPaint.setColor (Color.BLACK);
canvas.drawText (String.valueOf ("aaaaaaaaaaaaaa"), width / 2,
height / 2, mPaint);
canvas.drawPoint (11,3, mPaint);
}
I modified the Launcher4.03, drawing on the icon above the text, drawing pictures, but no effect. Great God seeking some research.