按键仅点击一次，自定义视图 [英] Button only clickable once with Custom View
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问题描述
我做了定制图像查看，简单的线条绘制。此图是由一个按钮triggeed。 当触发onClicklistener心不是工作了。但在屏幕上的按钮保持点击，点击时（默认的Android按钮）的按钮改变为略带蓝色的颜色。我认为这个问题可能是在的drawLine（）当的setContentView（R.layout.activity_main）;是所谓的，但不知道为什么，以及如何摆脱它。希望能帮到你。
MainActivity.java
公共类MainActivity扩展ActionBarActivity实现OnTouchListener，
OnClickListener {
私人诠释数目;
私人处理程序处理程序;
私人布尔运行=真;
私人诠释endX = 50;
私人诠释恩迪= 500;
私人诠释STARTX = 50;
私人诠释startY = 50;
私人诠释帧= 25;
ImageView的Line01;
按钮buttonLineDrawer;
@覆盖
保护无效的onCreate（包savedInstanceState）{
super.onCreate（savedInstanceState）;
的setContentView（R.layout.activity_main）;
Line01 =（ImageView的）findViewById（R.id.Line01）;
Line01.setVisibility（View.GONE）;
按钮buttonLineDrawer;
buttonLineDrawer =（按钮）findViewById（R.id.buttonLineDrawer）;
buttonLineDrawer.setOnClickListener（本）;
}
@覆盖
公共布尔onTouch（视图V，MotionEvent事件）{
// TODO自动生成方法存根
返回false;
}
@覆盖
公共无效的onClick（视图v）{
Toast.makeText（getApplicationContext（），克利克，Toast.LENGTH_LONG）
。显示（）;
运行=真;
号= 0;
的drawLine（）;
}
公共无效的drawLine（）{
Line01.setVisibility（View.VISIBLE）;
处理程序=新的处理程序（）;
可运行可运行=新的Runnable（）{
@覆盖
公共无效的run（）{
而（运行）{
尝试 {
视频下载（40）;
}赶上（InterruptedException异常E）{
e.printStackTrace（）;
}
handler.post（新的Runnable（）{
@覆盖
公共无效的run（）{
INT coordX =（（（（endX - STARTX）/帧）*号））
+ STARTX;
INT coordY =（（（（恩迪 - startY）/帧）*号））
+ startY;
号+ = 1;
CustomDraw.setCoordinates（STARTX，startY，coordX，
coordY）;
的setContentView（R.layout.activity_main）;
如果（（coordX - endX）== 0安培;＆安培; coordY - 恩迪== 0）{
运行= FALSE;
}
}
}）;
}
}
};
新的线程（可运行）。开始（）;
}}
activity_main.xml
＆LT; RelativeLayout的的xmlns：机器人=http://schemas.android.com/apk/res/android
的xmlns：工具=http://schemas.android.com/tools
机器人：layout_width =match_parent
机器人：layout_height =match_parent
机器人：后台=＃FF8800
机器人：paddingBottom会=@扪/ activity_vertical_margin
机器人：以下属性来=@扪/ activity_horizontal_margin
机器人：paddingRight =@扪/ activity_horizontal_margin
机器人：paddingTop =@扪/ activity_vertical_margin
工具：上下文=de.trialar.linedrawer.MainActivity＆GT;
＆LT;的LinearLayout
机器人：layout_width =WRAP_CONTENT
机器人：layout_height =WRAP_CONTENT
机器人：方向=垂直＆GT;
＆LT;按钮
机器人：ID =@ + ID / buttonLineDrawer
机器人：layout_width =WRAP_CONTENT
机器人：layout_height =WRAP_CONTENT
机器人：文本=按钮/＆GT;
＆LT; de.trialar.linedrawer.CustomDraw
机器人：ID =@ + ID / Line01
机器人：layout_width =400dp
机器人：layout_height =400dp/＆GT;
＆LT; / LinearLayout中＆GT;＆LT; / RelativeLayout的＆GT;
CustomDraw.java
公共类CustomDraw扩展ImageView的{
涂料粉刷=新的油漆（）;
私有静态诠释endX = 500;
私有静态诠释恩迪= 500;
私有静态诠释STARTX = 50;
私有静态诠释startY = 50;
静态上下文的背景下;
公共CustomDraw（上下文的背景下，ATTRS的AttributeSet，诠释defStyle）{
超（背景下，ATTRS，defStyle）;
this.context =背景;
}
公共CustomDraw（上下文的背景下，ATTRS的AttributeSet）{
超（背景下，ATTRS）;
}
公共CustomDraw（上下文的背景下）{
超（上下文）;
}
@覆盖
保护无效的OnDraw（帆布油画）{
super.onDraw（画布）;
paint.setColor（Color.BLACK）;
paint.setStrokeWidth（10）;
canvas.drawLine（STARTX，startY，endX，恩迪，油漆）;
}
公共静态无效setCoordinates（INT STARTX，诠释startY，诠释endX，诠释恩迪）{
的System.out.println（SetCoordinates）;
CustomDraw.endX = endX;
CustomDraw.endY =恩迪;
CustomDraw.startX = STARTX;
CustomDraw.startY = startY;
}}
解决方案
我想我发现了问题：当您启动handler.run（）设置一个新的布局：
公共无效的run（）{
INT coordX =（（（（endX - STARTX）/帧）*号））+ STARTX;
INT coordY =（（（（恩迪 - startY）/帧）*号））+ startY;
号+ = 1;
CustomDraw.setCoordinates（STARTX，startY，coordX，coordY）;
//也许这是错误的
的setContentView（R.layout.activity_main）;
//尝试，而不是：
CustomDraw.invalidate（）;
如果（（coordX - endX）== 0安培;＆安培; coordY - 恩迪== 0）{
运行= FALSE;
}
}
我不明白你为什么设定一个新的布局......我猜你要重新绘制按钮...这就是为什么我添加了一个repaint'线在code-件以上。
i made custom Image View, where a simple line is drawn. This drawing is triggeed by a button. When triggered the onClicklistener isnt working anymore. But on the screen the button remains clickable, the buttons changes to a blueish color when clicked (default Android button). I think the problem might be in the "drawLine()" when the "setContentView(R.layout.activity_main);" is called, but not sure why and how to get rid of it. Hope you can help.
MainActivity.java
public class MainActivity extends ActionBarActivity implements OnTouchListener,
OnClickListener {
private int number;
private Handler handler;
private boolean Running = true;
private int endX = 50;
private int endY = 500;
private int startX = 50;
private int startY = 50;
private int frames = 25;
ImageView Line01;
Button buttonLineDrawer;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Line01 = (ImageView) findViewById(R.id.Line01);
Line01.setVisibility(View.GONE);
Button buttonLineDrawer;
buttonLineDrawer = (Button) findViewById(R.id.buttonLineDrawer);
buttonLineDrawer.setOnClickListener(this);
}
@Override
public boolean onTouch(View v, MotionEvent event) {
// TODO Auto-generated method stub
return false;
}
@Override
public void onClick(View v) {
Toast.makeText(getApplicationContext(), "klick", Toast.LENGTH_LONG)
.show();
Running = true;
number = 0;
drawLine();
}
public void drawLine() {
Line01.setVisibility(View.VISIBLE);
handler = new Handler();
Runnable runnable = new Runnable() {
@Override
public void run() {
while (Running) {
try {
Thread.sleep(40);
} catch (InterruptedException e) {
e.printStackTrace();
}
handler.post(new Runnable() {
@Override
public void run() {
int coordX = ((((endX - startX) / frames) * number))
+ startX;
int coordY = ((((endY - startY) / frames) * number))
+ startY;
number += 1;
CustomDraw.setCoordinates(startX, startY, coordX,
coordY);
setContentView(R.layout.activity_main);
if ((coordX - endX) == 0 && coordY - endY == 0) {
Running = false;
}
}
});
}
}
};
new Thread(runnable).start();
}}
activity_main.xml
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#FF8800"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context="de.trialar.linedrawer.MainActivity" >
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical" >
<Button
android:id="@+id/buttonLineDrawer"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Button" />
<de.trialar.linedrawer.CustomDraw
android:id="@+id/Line01"
android:layout_width="400dp"
android:layout_height="400dp" />
</LinearLayout></RelativeLayout>
CustomDraw.java
public class CustomDraw extends ImageView {
Paint paint = new Paint();
private static int endX= 500;
private static int endY= 500;
private static int startX= 50;
private static int startY= 50;
static Context context;
public CustomDraw(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
this.context = context;
}
public CustomDraw(Context context, AttributeSet attrs) {
super(context, attrs);
}
public CustomDraw(Context context) {
super(context);
}
@Override
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
paint.setColor(Color.BLACK);
paint.setStrokeWidth(10);
canvas.drawLine(startX, startY, endX, endY, paint);
}
public static void setCoordinates(int startX, int startY, int endX, int endY) {
System.out.println("SetCoordinates");
CustomDraw.endX = endX;
CustomDraw.endY = endY;
CustomDraw.startX = startX;
CustomDraw.startY = startY;
}}
解决方案
i think i found the problem: when you start the handler.run() you set a new Layout:
public void run() {
int coordX = ((((endX - startX) / frames) * number)) + startX;
int coordY = ((((endY - startY) / frames) * number)) + startY;
number += 1;
CustomDraw.setCoordinates(startX, startY, coordX, coordY);
//maybe this is wrong
setContentView(R.layout.activity_main);
//try instead:
CustomDraw.invalidate();
if ((coordX - endX) == 0 && coordY - endY == 0) {
Running = false;
}
}
i don't get why you set a new layout... i guess you want to repaint the button... that's why i added a 'repaint'-line in that code-piece above
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