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我有這個自定義按鈕，它沒有繪製自己，並沒有子視圖。應用程序啓動後右它看起來像這樣：自定義按鈕背景被繪製錯誤（有時）
在這一點上，我不知道是什麼代碼和細節可能是相關的張貼在這裏。事實是，應用程序更改狀態後，按鈕會檢查是否要保留VISIBLE或去INVISIBLE。它仍然是VISIBLE。它要求setVisibility(View.VISIBLE)，之後，當屏幕再次顯示，它看起來像這樣：
如果我點擊它返回到被罰款，其原有的背景尺寸的按鈕。
我有什麼到目前爲止
我已經調試的代碼下降到Android源完成。
第一個onDraw();我只打電話super.onDraw();，它似乎只處理文本而不處理背景，如果是這樣，它就可以正常工作，因爲文本仍然像以前一樣定位和標註。
第二onMeasure();這裏我也只叫super.onMeasure();;在第一次顯示前稱爲幾次（11次），在setVisibility()後稱爲5次。當我點擊按鈕時，它根本不會被調用。
第三個onTouchEvent()，當我點擊按鈕時調用。它爲ACTION_DOWN不同顏色的背景，並恢復對ACTION_UP
@Override
protected void onDraw(Canvas canvas) {
Log.d(TAG + " " + getText(), "+ onDraw(canvas:" + canvas + ")");
super.onDraw(canvas);
Log.d(TAG + " " + getText(), "- onDraw()");
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
Log.d(TAG + " " + getText(), String.format("+ onMeasure(widthMeasureSpec:%x, heightMeasureSpec:%x)", widthMeasureSpec,heightMeasureSpec));
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
Log.d(TAG + " " + getText(), String.format("- onMeasure(): width=%d, hieght=%d", getMeasuredWidth(), getMeasuredHeight()));
}
@Override
public boolean onTouchEvent(MotionEvent event) {
Log.d(TAG + " " + getText(), "+ onTouchEvent(event:" + event + ")");
super.onTouchEvent(event);
if(clickable) {
if(event.getAction() == MotionEvent.ACTION_UP) {
setBackgroundDrawable(normalBackground);
clickUp.soundPlay();
} else if(event.getAction() == MotionEvent.ACTION_DOWN) {
setBackgroundDrawable(pressedBackground);
clickDown.soundPlay();
}
}
Log.d(TAG + " " + getText(), "- onTouchEvent()");
return true;
}
/**
* Sets the MyButton visible if stateFlags matches.<br>
* @param stateFlags The current app state.<br>
*/
public void setState(int stateFlags) {
Log.d(TAG + " " + getText(), "+ setState(stateFlags:" + stateFlags + ")");
if(state == stateFlags || state == State.NORMAL) {
setVisibility(View.VISIBLE);
Log.d(TAG + " " + getText(), "state(" + state + ") VISIBLE before was " + getVisibility());
} else {
setVisibility(View.INVISIBLE);
Log.d(TAG + " " + getText(), "state(" + state + ") INVISIBLE before was " + getVisibility());
}
requestLayout();
Log.d(TAG + " " + getText(), "- setState()");
}
@Override
protected int[] onCreateDrawableState(int extraSpace) {
Log.d(TAG + " " + getText(), "+ onCreateDrawableState(extraSpace:" + extraSpace + ")");
Log.d(TAG + " " + getText(), "- onCreateDrawableState()");
return super.onCreateDrawableState(extraSpace);
}
原來的顏色背景這些按鈕的日誌：
*** Beggining - first show ***
+ onMeasure(widthMeasureSpec:800002b8, heightMeasureSpec:800003aa)
- onMeasure(): width=200, hieght=125
+ onMeasure(widthMeasureSpec:40000099, heightMeasureSpec:800003aa)
- onMeasure(): width=153, hieght=125
+ onMeasure(widthMeasureSpec:800002b8, heightMeasureSpec:80000152)
- onMeasure(): width=200, hieght=125
+ onMeasure(widthMeasureSpec:40000099, heightMeasureSpec:80000152)
- onMeasure(): width=153, hieght=125
+ onMeasure(widthMeasureSpec:800002b8, heightMeasureSpec:80000035)
- onMeasure(): width=200, hieght=53
+ onMeasure(widthMeasureSpec:40000099, heightMeasureSpec:80000035)
- onMeasure(): width=153, hieght=53
+ onSizeChanged(w:153, h:53, oldw:0, oldh:0)
- onSizeChanged()
+ onLayout(changed:true, left:12, top:3, right:165, bottom:56)
- onLayout()
+ onMeasure(widthMeasureSpec:800002b8, heightMeasureSpec:80000035)
- onMeasure(): width=200, hieght=53
+ onMeasure(widthMeasureSpec:40000099, heightMeasureSpec:80000035)
- onMeasure(): width=153, hieght=53
+ onLayout(changed:false, left:12, top:3, right:165, bottom:56)
- onLayout()
+ onDraw(canvas:[email protected])
+ onCreateDrawableState(extraSpace:0)
- onCreateDrawableState()
- onDraw()
*** App changes state - button shows wrong ****
+ setState(stateFlags:2)
state(1) VISIBLE before was 0
- setState()
+ onMeasure(widthMeasureSpec:800002b8, heightMeasureSpec:80000152)
- onMeasure(): width=200, hieght=125
+ onMeasure(widthMeasureSpec:800002b8, heightMeasureSpec:80000035)
- onMeasure(): width=200, hieght=53
+ onMeasure(widthMeasureSpec:40000099, heightMeasureSpec:80000035)
- onMeasure(): width=153, hieght=53
+ onLayout(changed:false, left:12, top:3, right:165, bottom:56)
- onLayout()
+ onDraw(canvas:[email protected])
- onDraw()
*** I am about to click the button, return to show fine ***
+ onTouchEvent(event:MotionEvent { action=ACTION_DOWN, id[0]=0, x[0]=61.0, y[0]=36.0, toolType[0]=TOOL_TYPE_FINGER, buttonState=0, metaState=0, flags=0x0, edgeFlags=0x0, pointerCount=1, historySize=0, eventTime=2879242, downTime=2879242, deviceId=0, source=0x1002 })
- onTouchEvent()
+ onDraw(canvas:[email protected])
+ onCreateDrawableState(extraSpace:0)
- onCreateDrawableState()
- onDraw()
+ onTouchEvent(event:MotionEvent { action=ACTION_UP, id[0]=0, x[0]=61.0, y[0]=36.0, toolType[0]=TOOL_TYPE_FINGER, buttonState=0, metaState=0, flags=0x0, edgeFlags=0x0, pointerCount=1, historySize=0, eventTime=2879342, downTime=2879242, deviceId=0, source=0x1002 })
- onTouchEvent()
+ performClick()
- performClick()
+ onDraw(canvas:[email protected])
+ onCreateDrawableState(extraSpace:0)
- onCreateDrawableState()
- onDraw()
更多細節將按需發佈，如果認爲相關。