的onDraw（）不会被调用 [英] onDraw() not being called
本文介绍了的onDraw（）不会被调用的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我的工作固定某人的Android应用程序。它最初是为2.1做，我试图让它工作4.0+。不幸的是谁提出的应用软件的人不在身边，所以我坚持自己的code。
该应用程序实现了定制的滑块，水平和垂直。我得到了垂直滑块固定的，但我不能让水平滑块工作。他并没有叫的onDraw（）：当视图加载，的onDraw（）被调用，我看到我的两个滑块初始化，然后当我将我的水平滑块它移动和呼叫的onDraw（）一次，但绝不会再就调用它，不像垂直滑块，不会调用它。
下面是code：
公共类PanSeekBar扩展RelativeLayout的{ 私人的RelativeLayout布局1;
公共ImageView的轨道;
公共ImageView的大拇指; 公共布尔初始化= FALSE;
公众诠释thumbDownPosX = 0;
公众诠释thumbDownPosY = 0;
公众诠释thumbLeft = 0;
公众诠释thumbTop = 0;
公众诠释thumbRight = 0;
公众诠释thumbBottom = 0;
私人INT最大= 100; 公共布尔感动= FALSE; 公共PanSeekBar（上下文的背景下）{
超级（上下文）;
初始化（上下文）;
// TODO自动生成构造函数存根
} // PanSeekBar构造结束 私人无效初始化（上下文的背景下）{
Log.d（初始化（PanSeekBar），初始化）;
setWillNotDraw（假）; LayoutInflater吹气=（LayoutInflater）上下文
.getSystemService（Context.LAYOUT_INFLATER_SERVICE）;
查看视图1 = inflater.inflate（R.layout.pan_seekbar，这一点）; 布局1 =（RelativeLayout的）view1.findViewById（R.id.ps_layout1）;
轨=（ImageView的）layout1.findViewById（R.id.ps_track）;
拇指=（ImageView的）layout1.findViewById（R.id.ps_thumb）; thumb.setOnTouchListener（新OnTouchListener（）{ @覆盖
公共布尔onTouch（视图V，MotionEvent事件）{
初始化= TRUE; 开关（event.getAction（））{
案例MotionEvent.ACTION_DOWN：
Log.d（onTouch（PanSeekBar），操作下）;
thumbDownPosX =（int）的event.getX（）;
thumbDownPosY =（int）的event.getY（）; thumbLeft = thumb.getLeft（）;
thumbTop = thumb.getTop（）;
thumbRight = thumb.getRight（）;
thumbBottom = thumb.getBottom（）;
感动= TRUE;
打破; 案例MotionEvent.ACTION_MOVE：
// Log.d（onTouch（PanSeekBar），动作移动）;
INT左=（int）的（thumb.getLeft（）+ event.getX（） - thumbDownPosX）;
如果（左℃，）{
左边= 0;
Log.d（onTouch（PanSeekBar），左℃的：+左）;
}否则如果（左＆GT = track.getWidth（） - thumb.getWidth（））{
左= track.getWidth（） - thumb.getWidth（）;
Log.d（onTouch（PanSeekBar），
左＆GT; = track.getWidth（）：+左）;
}
INT顶= thumb.getTop（）;
INT右=左+ thumb.getWidth（）;
INT底部=顶部+ thumb.getHeight（）; thumbLeft =左;
thumbTop =顶部;
thumbRight =权利;
thumbBottom =底部; Log.d（onTouch（PanSeekBar），
动作移动 - 拇指布局：+ thumbLeft +，
+ thumbTop +，+ thumbRight +，
+ thumbBottom）; layout1.invalidate（）;
// thumb.invalidate（）; 打破; 案例MotionEvent.ACTION_UP：
Log.d（onTouch（PanSeekBar），操作上）;
感动= FALSE;
打破;
} //开关结束 返回true;
} // onTouch结束
}）;
} //初始化结束 @覆盖
保护无效的onDraw（帆布油画）{
Log.d（的onDraw（PanSeekBar），的onDraw）;
super.onDraw（画布）; 如果（初始化）{
thumb.layout（thumbLeft，thumbTop，thumbRight，thumbBottom）;
Log.d（的onDraw（PanSeekBar），拇指布局：+ thumbLeft +，
+ thumbTop +，+ thumbRight +，+ thumbBottom）;
}
} //的onDraw结束
} // PanSeekBar结束
下面是code的垂直滑块，做的工作：
公共类MySeekBar扩展RelativeLayout的{ 私人的RelativeLayout布局1;
公共ImageView的轨道;
公共ImageView的大拇指;
私人MyToast敬酒;
私人MyToast烤面包;
私人MyToast toast3;
私人诠释globalMaxValue;
私人诠释globalProgress; 初始化= FALSE私人布尔;
公众诠释thumbDownPosX = 0;
公众诠释thumbDownPosY = 0;
公众诠释thumbLeft = 0;
公众诠释thumbTop = 0;
公众诠释thumbRight = 0;
公众诠释thumbBottom = 0; 私人INT globalSetProgress = 0;
私人INT globalConfigType = 1; //保证金顶部custom_seekbar.xml
私人INT marginTop = 20;
公共布尔感动= FALSE; 公共MySeekBar（上下文的背景下）{
超级（上下文）;
// TODO自动生成构造函数存根
初始化（上下文）;
} // MySeekBar结束 公共无效初始化（上下文的背景下）{
Log.d（初始化（MySeekBar），初始化）;
setWillNotDraw（假）; LayoutInflater吹气=（LayoutInflater）上下文
.getSystemService（Context.LAYOUT_INFLATER_SERVICE）;
查看视图1 = inflater.inflate（R.layout.custom_seekbar，这一点）; 布局1 =（RelativeLayout的）view1.findViewById（R.id.al_cs_layout1）;
轨=（ImageView的）layout1.findViewById（R.id.cs_track）;
拇指=（ImageView的）layout1.findViewById（R.id.cs_thumb）; //获取marginTop
MarginLayoutParams PARAMS =（MarginLayoutParams）轨道
.getLayoutParams（）;
Log.d（初始化（MySeekBar），当前margintop =+ marginTop）;
marginTop = params.topMargin;
Log.d（初始化（MySeekBar），新margintop =+ marginTop）; // INT marginTopPixelSize = params.topMargin;
// Log.d（初始化（MySeekBar），调试=+ marginTopPixelSize）; //贾里德
//当创建MyToast，设置宽度导致的问题。
敬酒=新MyToast（背景）;
toast.setText（）;
toast.setBackgroundColor（Color.LTGRAY）;
toast.setTextColor（Color.BLACK）;
toast.setPadding（1，1，1，1）;
toast.setVisibility（View.INVISIBLE）;
toast.setTextSize（10F）;
// toast.setWidth（40）; 烤面包=新MyToast（背景）;
toast2.setTextSize（12F）;
toast2.setTextColor（Color.rgb（192，255，3））;
// toast2.setWidth（40）;
toast2.setPadding（10，1，1，1）;
// toast2.setBackgroundColor（Color.BLACK）;
toast2.setVisibility（View.INVISIBLE）; toast3 =新MyToast（背景）;
toast3.setText（CH）;
toast3.setTextSize（15F）;
toast3.setTextColor（Color.rgb（192，255，3））;
// toast3.setWidth（40）;
toast3.setPadding（1，1，1，1）; layout1.addView（面包）;
layout1.addView（烤面包）;
layout1.addView（toast3）; thumb.setOnTouchListener（新OnTouchListener（）{ @覆盖
公共布尔onTouch（视图V，MotionEvent事件）{
初始化= TRUE; // 0 =跌1 =上涨2 =移动
// Log.d（onTouch（MySeekBar），
// Integer.toString（event.getAction（）））;
开关（event.getAction（））{
案例MotionEvent.ACTION_DOWN：
Log.d（onTouch（MySeekBar），操作下）;
thumbDownPosX =（int）的event.getX（）;
thumbDownPosY =（int）的event.getY（）;
//拇指位置感动。不相干的规模
// Log.d（onTouch（NewSeekBar），thumbDownPosX+ thumbDownPosX +thumbDownPosY+ thumbDownPosY）;
thumbLeft = thumb.getLeft（）;
thumbTop = thumb.getTop（）;
thumbRight = thumb.getRight（）;
thumbBottom = thumb.getBottom（）;
感动= TRUE;
toast2.setVisibility（View.INVISIBLE）;
toast3.setVisibility（View.INVISIBLE）;
toast.setVisibility（View.VISIBLE）;
拇指按钮//位置/尺寸
// Log.d（onTouch（NewSeekBar），thumbLeft+ thumbLeft +thumbRight+ thumbRight +thumbTop+ thumbTop +thumbBottom+ thumbBottom）; 打破; 案例MotionEvent.ACTION_MOVE：
// Log.d（onTouch（MySeekBar），动作移动）;
INT thumbHeight = thumb.getHeight（）;
INT thumbWidth = thumb.getWidth（）;
INT trackWidth = track.getWidth（）;
INT trackHeight = track.getHeight（）;
拇指按钮，轨道//位置/尺寸
// Log.d（onTouch（NewSeekBar），thumbHeight+ thumbHeight +thumbWidth+ thumbWidth +trackWidth+ trackWidth +trackHeight+ trackHeight）; INT顶=（int）的（thumb.getTop（）+ event.getY（） - thumbDownPosY）;
Log.d（onTouch（NewSeekBar），顶+顶部）; //顶部边框
如果（顶部＆LT; marginTop）{
顶部= marginTop;
Log.d（onTouch（NewSeekBar），顶＆LT; marginTop+顶部）;
}否则如果（顶部＆GT; = trackHeight - thumbHeight + marginTop）{
顶部= trackHeight - thumbHeight + marginTop;
Log.d（onTouch（NewSeekBar），顶＆GT; = trackHeight
+顶部）;
} thumbLeft = thumb.getLeft（）;
;
thumbTop =顶部;
thumbRight = thumbLeft + thumbWidth;
thumbBottom =顶部+ thumbHeight; // Log.d（onTouch（MySeekBar），
//thumbTop：+ thumbTop +thumbBottom：+ thumbBottom）;
int值= getProgress（）;
Log.d（onTouch（NewSeekBar），getProgress（）：+值）;
// setdBText（值）; // Log.d（onTouch（MySeekBar），值：+值）;
setProgress（值）;
// toast.setText（将String.valueOf（临时））;
// toast2.setText（将String.valueOf（临时））;
layout1.invalidate（）; 打破; 案例MotionEvent.ACTION_UP：
Log.d（onTouch（MySeekBar），操作上）;
toast.setVisibility（View.INVISIBLE）;
toast2.setVisibility（View.VISIBLE）;
toast3.setVisibility（View.VISIBLE）;
感动= FALSE;
打破;
} //开关结束
返回true;
} // onTouch结束
}）;
} //初始化结束 @覆盖
保护无效的onDraw（帆布油画）{
Log.d（的onDraw（MySeekBar），的onDraw）;
super.onDraw（画布）; 如果（初始化）{
thumb.layout（thumbLeft，thumbTop，thumbRight，thumbBottom）;
Log.d（的onDraw（MySeekBar），拇指布局：+ thumbLeft +，
+ thumbTop +，+ thumbRight +，+ thumbBottom）;
INT顶部= thumbTop - marginTop;
INT左= thumbLeft + 4;
// toast.layout（左，上，左+ toast.getWidth（），顶+
// toast.getHeight（））; 顶= thumbTop + thumb.getHeight（）/ 2 - toast2.getHeight（）/ 2 + 1;
左= thumbLeft;
toast2.layout（左，上，左+ toast2.getWidth（）
顶+ toast2.getHeight（））;
}
} //的onDraw结束
中的XML：
＆LT;？XML版本=1.0编码=UTF-8＆GT？;
＆LT; LinearLayout中的xmlns：机器人=http://schemas.android.com/apk/res/android
机器人：layout_width =match_parent
机器人：layout_height =match_parent
机器人：方向=垂直
机器人：ID =@ + ID / test_layout＆GT; ＆LT;的LinearLayout
机器人：layout_width =WRAP_CONTENT
机器人：layout_height =WRAP_CONTENT
机器人：方向=横向＆GT; ＆LT; com.networksound.Mixer3.NewSeekBar
机器人：ID =@ + ID / newSeekBar1
机器人：layout_width =WRAP_CONTENT
机器人：layout_height =WRAP_CONTENT＆GT;
＆LT; /com.networksound.Mixer3.NewSeekBar> ＆LT; com.networksound.Mixer3.NewSeekBar
机器人：ID =@ + ID / newSeekBar2
机器人：layout_width =WRAP_CONTENT
机器人：layout_height =WRAP_CONTENT＆GT;
＆LT; /com.networksound.Mixer3.NewSeekBar> ＆LT; com.networksound.Mixer3.MySeekBar
机器人：ID =@ + ID / mySeekBar1
机器人：layout_width =WRAP_CONTENT
机器人：layout_height =WRAP_CONTENT＆GT;
＆LT; /com.networksound.Mixer3.MySeekBar> ＆LT; com.networksound.Mixer3.MySeekBar
机器人：ID =@ + ID / mySeekBar2
机器人：layout_width =WRAP_CONTENT
机器人：layout_height =WRAP_CONTENT＆GT;
＆LT; /com.networksound.Mixer3.MySeekBar> ＆LT; / LinearLayout中＆GT; ＆LT;的LinearLayout
机器人：layout_width =match_parent
机器人：layout_height =match_parent
机器人：方向=垂直＆GT; ＆LT; com.networksound.Mixer3.PanSeekBar
机器人：ID =@ + ID / panSeekBar1
机器人：layout_width =match_parent
机器人：layout_height =WRAP_CONTENT＆GT;
＆LT; /com.networksound.Mixer3.PanSeekBar> ＆LT; com.networksound.Mixer3.PanSeekBar
机器人：ID =@ + ID / panSeekBar2
机器人：layout_width =WRAP_CONTENT
机器人：layout_height =WRAP_CONTENT＆GT;
＆LT; /com.networksound.Mixer3.PanSeekBar> ＆LT; / LinearLayout中＆GT;
＆LT; / LinearLayout中＆GT;
解决方案
如果你伸出的的ViewGroup 就应该把控 dispatchDraw（） 而不是的onDraw（），或在构造函数中，调用 setWillNotDraw（假）。有一个关于它这里一些讨论。
I am working on fixing someone's Android app. It was originally made for 2.1 and I am trying to get it work to 4.0+. Unfortunately the person who made the app is not around so I am stuck with his code.
The app implements custom sliders, a horizontal and vertical. I got the vertical slider fixed, but I cannot get the horizontal slider to work. It is not calling onDraw(): When the view loads, onDraw() gets called and I see both of my sliders initialized, then when I move my horizontal slider it moves and calls onDraw() once, but never again will it call it, unlike the vertical slider which does call it.
Here is the code:
public class PanSeekBar extends RelativeLayout {
private RelativeLayout layout1;
public ImageView track;
public ImageView thumb;
public boolean initialized = false;
public int thumbDownPosX = 0;
public int thumbDownPosY = 0;
public int thumbLeft = 0;
public int thumbTop = 0;
public int thumbRight = 0;
public int thumbBottom = 0;
private int max = 100;
public boolean touched = false;
public PanSeekBar(Context context) {
super(context);
initialize(context);
// TODO Auto-generated constructor stub
}// End of PanSeekBar Constructor
private void initialize(Context context) {
Log.d("initialize (PanSeekBar)", "initialize");
setWillNotDraw(false);
LayoutInflater inflater = (LayoutInflater) context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View view1 = inflater.inflate(R.layout.pan_seekbar, this);
layout1 = (RelativeLayout) view1.findViewById(R.id.ps_layout1);
track = (ImageView) layout1.findViewById(R.id.ps_track);
thumb = (ImageView) layout1.findViewById(R.id.ps_thumb);
thumb.setOnTouchListener(new OnTouchListener() {
@Override
public boolean onTouch(View v, MotionEvent event) {
initialized = true;
switch (event.getAction()) {
case MotionEvent.ACTION_DOWN:
Log.d("onTouch (PanSeekBar)", "Action Down");
thumbDownPosX = (int) event.getX();
thumbDownPosY = (int) event.getY();
thumbLeft = thumb.getLeft();
thumbTop = thumb.getTop();
thumbRight = thumb.getRight();
thumbBottom = thumb.getBottom();
touched = true;
break;
case MotionEvent.ACTION_MOVE:
// Log.d("onTouch (PanSeekBar)", "Action Move");
int left = (int) (thumb.getLeft() + event.getX() - thumbDownPosX);
if (left < 0) {
left = 0;
Log.d("onTouch (PanSeekBar)", "left < 0: " + left);
} else if (left >= track.getWidth() - thumb.getWidth()) {
left = track.getWidth() - thumb.getWidth();
Log.d("onTouch (PanSeekBar)",
"left >= track.getWidth(): " + left);
}
int top = thumb.getTop();
int right = left + thumb.getWidth();
int bottom = top + thumb.getHeight();
thumbLeft = left;
thumbTop = top;
thumbRight = right;
thumbBottom = bottom;
Log.d("onTouch (PanSeekBar)",
"Action Move -- thumb layout: " + thumbLeft + ", "
+ thumbTop + ", " + thumbRight + ", "
+ thumbBottom);
layout1.invalidate();
// thumb.invalidate();
break;
case MotionEvent.ACTION_UP:
Log.d("onTouch (PanSeekBar)", "Action Up");
touched = false;
break;
}// End of switch
return true;
}// End of onTouch
});
}// End of initialize
@Override
protected void onDraw(Canvas canvas) {
Log.d("onDraw (PanSeekBar)", "onDraw");
super.onDraw(canvas);
if (initialized) {
thumb.layout(thumbLeft, thumbTop, thumbRight, thumbBottom);
Log.d("onDraw (PanSeekBar)", "thumb layout: " + thumbLeft + ", "
+ thumbTop + ", " + thumbRight + ", " + thumbBottom);
}
}// End of onDraw
}// End of PanSeekBar
Here is the code for the vertical slider that does work:
public class MySeekBar extends RelativeLayout {
private RelativeLayout layout1;
public ImageView track;
public ImageView thumb;
private MyToast toast;
private MyToast toast2;
private MyToast toast3;
private int globalMaxValue;
private int globalProgress;
private boolean initialized = false;
public int thumbDownPosX = 0;
public int thumbDownPosY = 0;
public int thumbLeft = 0;
public int thumbTop = 0;
public int thumbRight = 0;
public int thumbBottom = 0;
private int globalSetProgress = 0;
private int globalConfigType = 1;
// Margin top in custom_seekbar.xml
private int marginTop = 20;
public boolean touched = false;
public MySeekBar(Context context) {
super(context);
// TODO Auto-generated constructor stub
initialize(context);
}// End of MySeekBar
public void initialize(Context context) {
Log.d("initialize (MySeekBar)", "initialize");
setWillNotDraw(false);
LayoutInflater inflater = (LayoutInflater) context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View view1 = inflater.inflate(R.layout.custom_seekbar, this);
layout1 = (RelativeLayout) view1.findViewById(R.id.al_cs_layout1);
track = (ImageView) layout1.findViewById(R.id.cs_track);
thumb = (ImageView) layout1.findViewById(R.id.cs_thumb);
// Gets marginTop
MarginLayoutParams params = (MarginLayoutParams) track
.getLayoutParams();
Log.d("initialize (MySeekBar)", "current margintop = " + marginTop);
marginTop = params.topMargin;
Log.d("initialize (MySeekBar)", "new margintop = " + marginTop);
// int marginTopPixelSize = params.topMargin;
// Log.d("initialize (MySeekBar)","debug = "+marginTopPixelSize);
// Jared
// When creating MyToast, setting width causes issues.
toast = new MyToast(context);
toast.setText("");
toast.setBackgroundColor(Color.LTGRAY);
toast.setTextColor(Color.BLACK);
toast.setPadding(1, 1, 1, 1);
toast.setVisibility(View.INVISIBLE);
toast.setTextSize(10f);
// toast.setWidth(40);
toast2 = new MyToast(context);
toast2.setTextSize(12f);
toast2.setTextColor(Color.rgb(192, 255, 3));
// toast2.setWidth(40);
toast2.setPadding(10, 1, 1, 1);
// toast2.setBackgroundColor(Color.BLACK);
toast2.setVisibility(View.INVISIBLE);
toast3 = new MyToast(context);
toast3.setText("CH");
toast3.setTextSize(15f);
toast3.setTextColor(Color.rgb(192, 255, 3));
// toast3.setWidth(40);
toast3.setPadding(1, 1, 1, 1);
layout1.addView(toast);
layout1.addView(toast2);
layout1.addView(toast3);
thumb.setOnTouchListener(new OnTouchListener() {
@Override
public boolean onTouch(View v, MotionEvent event) {
initialized = true;
// 0=down 1=up 2=move
// Log.d("onTouch (MySeekBar)",
// Integer.toString(event.getAction()));
switch (event.getAction()) {
case MotionEvent.ACTION_DOWN:
Log.d("onTouch (MySeekBar)", "Action Down");
thumbDownPosX = (int) event.getX();
thumbDownPosY = (int) event.getY();
// Position of thumb touched. Irrelevant to scale
// Log.d("onTouch (NewSeekBar)","thumbDownPosX "+thumbDownPosX+" thumbDownPosY "+thumbDownPosY);
thumbLeft = thumb.getLeft();
thumbTop = thumb.getTop();
thumbRight = thumb.getRight();
thumbBottom = thumb.getBottom();
touched = true;
toast2.setVisibility(View.INVISIBLE);
toast3.setVisibility(View.INVISIBLE);
toast.setVisibility(View.VISIBLE);
// Location/size of the thumb button
// Log.d("onTouch (NewSeekBar)","thumbLeft "+thumbLeft+" thumbRight "+thumbRight+" thumbTop "+thumbTop+" thumbBottom "+thumbBottom);
break;
case MotionEvent.ACTION_MOVE:
// Log.d("onTouch (MySeekBar)", "Action Move");
int thumbHeight = thumb.getHeight();
int thumbWidth = thumb.getWidth();
int trackWidth = track.getWidth();
int trackHeight = track.getHeight();
// Location/size of the thumb button and track
// Log.d("onTouch (NewSeekBar)","thumbHeight "+thumbHeight+" thumbWidth "+thumbWidth+" trackWidth "+trackWidth+" trackHeight "+trackHeight);
int top = (int) (thumb.getTop() + event.getY() - thumbDownPosY);
Log.d("onTouch (NewSeekBar)", "top " + top);
// Top border
if (top < marginTop) {
top = marginTop;
Log.d("onTouch (NewSeekBar)", "top < marginTop " + top);
} else if (top >= trackHeight - thumbHeight + marginTop) {
top = trackHeight - thumbHeight + marginTop;
Log.d("onTouch (NewSeekBar)", "top >= trackHeight "
+ top);
}
thumbLeft = thumb.getLeft();
;
thumbTop = top;
thumbRight = thumbLeft + thumbWidth;
thumbBottom = top + thumbHeight;
// Log.d("onTouch (MySeekBar)",
// "thumbTop: "+thumbTop+" thumbBottom: "+thumbBottom);
int value = getProgress();
Log.d("onTouch (NewSeekBar)", "getProgress(): " + value);
// setdBText(value);
// Log.d("onTouch (MySeekBar)", "value: "+value);
setProgress(value);
// toast.setText(String.valueOf(temp));
// toast2.setText(String.valueOf(temp));
layout1.invalidate();
break;
case MotionEvent.ACTION_UP:
Log.d("onTouch (MySeekBar)", "Action Up");
toast.setVisibility(View.INVISIBLE);
toast2.setVisibility(View.VISIBLE);
toast3.setVisibility(View.VISIBLE);
touched = false;
break;
}// End of switch
return true;
}// End of onTouch
});
}// End of initialize
@Override
protected void onDraw(Canvas canvas) {
Log.d("onDraw (MySeekBar)", "onDraw");
super.onDraw(canvas);
if (initialized) {
thumb.layout(thumbLeft, thumbTop, thumbRight, thumbBottom);
Log.d("onDraw (MySeekBar)", "thumb layout: " + thumbLeft + ", "
+ thumbTop + ", " + thumbRight + ", " + thumbBottom);
int top = thumbTop - marginTop;
int left = thumbLeft + 4;
// toast.layout(left, top, left + toast.getWidth(), top +
// toast.getHeight());
top = thumbTop + thumb.getHeight() / 2 - toast2.getHeight() / 2 + 1;
left = thumbLeft;
toast2.layout(left, top, left + toast2.getWidth(),
top + toast2.getHeight());
}
}// End of onDraw
The XML:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:id="@+id/test_layout">
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal" >
<com.networksound.Mixer3.NewSeekBar
android:id="@+id/newSeekBar1"
android:layout_width="wrap_content"
android:layout_height="wrap_content" >
</com.networksound.Mixer3.NewSeekBar>
<com.networksound.Mixer3.NewSeekBar
android:id="@+id/newSeekBar2"
android:layout_width="wrap_content"
android:layout_height="wrap_content" >
</com.networksound.Mixer3.NewSeekBar>
<com.networksound.Mixer3.MySeekBar
android:id="@+id/mySeekBar1"
android:layout_width="wrap_content"
android:layout_height="wrap_content" >
</com.networksound.Mixer3.MySeekBar>
<com.networksound.Mixer3.MySeekBar
android:id="@+id/mySeekBar2"
android:layout_width="wrap_content"
android:layout_height="wrap_content" >
</com.networksound.Mixer3.MySeekBar>
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<com.networksound.Mixer3.PanSeekBar
android:id="@+id/panSeekBar1"
android:layout_width="match_parent"
android:layout_height="wrap_content" >
</com.networksound.Mixer3.PanSeekBar>
<com.networksound.Mixer3.PanSeekBar
android:id="@+id/panSeekBar2"
android:layout_width="wrap_content"
android:layout_height="wrap_content" >
</com.networksound.Mixer3.PanSeekBar>
</LinearLayout>
</LinearLayout>
解决方案
If you're extending a ViewGroup you should either override dispatchDraw() instead of onDraw(), or in the constructor, call setWillNotDraw(false). There's some discussion on it here.
这篇关于的onDraw（）不会被调用的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
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