Java 创建拖放图像按钮
我看了一些教程,了解如何使imagebutton能够拖放。在代码中,当我单击imagebutton时,它就消失了。当我点击其他地方时,它不会回来 以下是我的imagebutton代码:Java 创建拖放图像按钮,java,android,xml,mobile,drag-and-drop,Java,Android,Xml,Mobile,Drag And Drop,我看了一些教程,了解如何使imagebutton能够拖放。在代码中,当我单击imagebutton时,它就消失了。当我点击其他地方时,它不会回来 以下是我的imagebutton代码: mainHut = (ImageButton) findViewById(R.id.mainHut); mainHut.setOnTouchListener(new OnTouchListener() { @Override public boolean o
mainHut = (ImageButton) findViewById(R.id.mainHut);
mainHut.setOnTouchListener(new OnTouchListener()
{
@Override
public boolean onTouch(View v, MotionEvent event)
{
Toast.makeText(getApplicationContext(), "in the movement", Toast.LENGTH_SHORT).show();
if (event.getAction() == MotionEvent.ACTION_DOWN)
{
mainHutSelected = true;
}//end if
if (event.getAction() == MotionEvent.ACTION_UP)
{
if (mainHutSelected == true)
{
mainHutSelected = false;
}//end if
}//end if
else if (event.getAction() == MotionEvent.ACTION_MOVE)
{
if (mainHutSelected == true)
{
LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(50, 50);
params.setMargins((int)event.getRawX() - 25, (int) event.getRawY() - 50, 0, 0);
layout = (LinearLayout) findViewById(R.id.gllayout);
layout.removeView(mainHut);
layout.addView(mainHut, params);
}//end if
}//end else
return false;
}//end onTouch function
});
以下是布局的xml:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/gllayout"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical"
android:background="@drawable/bgm" >
<ImageButton
android:id="@+id/mainHut"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="@drawable/mainhut" />
</LinearLayout>
感谢您的帮助。谢谢。回答我自己的问题……这就是我解决问题的方法。我花了很长时间才弄明白,但它就在这里。当涉及到我自己的imagebutton时,参数有点混乱,因此我必须弄清楚如何将我的手指保持在按钮的中心,但这会像我想要的那样移动按钮:
button.setOnTouchListener(new View.OnTouchListener()
{
public boolean onTouch(View v, MotionEvent event)
{
if (me.getAction() == MotionEvent.ACTION_MOVE )
{
LayoutParams params = new LayoutParams(v.getWidth(), v.getHeight());
params.setMargins((int)event.getRawX() - v.getWidth()/2, (int)(event.getRawY() - v.getHeight()), (int)event.getRawX() - v.getWidth()/2, (int)(event.getRawY() - v.getHeight()));
v.setLayoutParams(params);
}
return false;
}
});