如何用左，右，上，下方向触摸触摸事件android上的按钮...？...我是Android的新手，想要开发一个回调应用程序。请通过提供一些链接来帮助
callbackButton.setOnTouchListener(new OnTouchListener() {
private float currX;
private float currY;
@Override
public boolean onTouch(View v, MotionEvent event) {
float x1 = 0, x2, y1 = 0, y2, dx, dy , oldx =0,oldy=0;
String direction;
switch(event.getAction()) {
case MotionEvent.ACTION_DOWN:
oldx = event.getX();
oldy = event.getY();
break;
case MotionEvent.ACTION_MOVE:
x2 = event.getX();
y2 = event.getY();
dx = x2-x1;
dy = y2-y1;
// Use dx and dy to determine the direction
if(Math.abs(dx) > Math.abs(dy)) {
if(dx>0) {
direction = "right";
Log.e("right...","moving..");
}else{
direction = "left";
Log.e("left...","moving..");
}
} else {
if(dy>0) {
direction = "down";
Log.e("down...","moving..");
currX = event.getRawX();
currY = event.getRawY();
Log.e("x=", ""+(currX-oldx));
Log.e("y=", ""+(currY-oldy));
MarginLayoutParams marginParams = new MarginLayoutParams(v.getLayoutParams());
marginParams.setMargins((int)(currX-oldx), (int)(currY-oldy),0, 0);
RelativeLayout.LayoutParams layoutParams = new RelativeLayout.LayoutParams(marginParams);
v.setLayoutParams(layoutParams);
} else {
direction = "up";
Log.e("up...","moving..");
}
}
}
return true;
}
});
这是我的imageButton移动触摸事件的代码。但是这段代码不能正常工作
答案 0 :(得分：4)
在这里，您将找到有关如何处理触摸事件的解释：
http://developer.android.com/guide/topics/ui/ui-events.html
然后，在触摸方法中，您需要
示例（使用http://developer.android.com/training/graphics/opengl/touch.html中的代码）
@Override
public boolean onTouchEvent(MotionEvent e) {
// MotionEvent reports input details from the touch screen
// and other input controls. In this case, you are only
// interested in events where the touch position changed.
float x = e.getX();
float y = e.getY();
switch (e.getAction()) {
case MotionEvent.ACTION_DOWN:
mIsDown = true;
break;
case MotionEvent.ACTION_MOVE:
float dx = x - mPreviousX;
float dy = y - mPreviousY;
// Here you can try to detect the swipe. It will be necessary to
// store more than the previous value to check that the user move constantly in the same direction
detectSwipe(dx, dy);
case MotionEvent.ACTION_UP:
mIsDown = false;
break;
}
mPreviousX = x;
mPreviousY = y;
return true;
}
使用这个简单的情况，你甚至不需要在用户将手指向下或向上移动时进行存储（因为移动意味着手指向下）但是存储布尔值会很有用）
祝你的应用好运
修改
您似乎使用一些代码编辑了帖子。你说你没有得到被忽视的结果，但你没有说你得到了什么。这可能对我们帮助您有用。
您应该尝试查找是否已存在检测滑动移动的库。我很确定那里有很多
编辑2：
我假设你的按钮是一个简单的android.Button。一种解决方案可能是创建一个扩展Button的类（例如：MySwipableButton）。在你的xml中，你创建一个包含你的MySwipableButton的布局，并给它提供移动的位置（例如，它有width = fill_parent，因为你想在while屏幕上滑动）。 MySwipableButton实现onTouch以存储按钮所在的位置（使用您已有的方法）
MySwipableButton也会覆盖onDraw(Graphics g)。在onDraw中，您可以在必须的位置绘制按钮（super.draw（））（关于当前滑动）并将视图的其余部分留空
答案 1 :(得分：2)
查看我的博客地点shown the drag drop image onTouch event。
Edit：这是完整的代码：
首先在你的eclipse中创建android项目并创建一个类和布局文件，如下所示：
MainActivity.java
public class MainActivity extends Activity
{
private ImageView m_ivImage, m_ivImage1;
private int m_counter = 0;
float m_lastTouchX, m_lastTouchY, m_posX, m_posY, m_prevX, m_prevY, m_imgXB, m_imgYB, m_imgXC, m_imgYC, m_dx, m_dy;
private LinearLayout m_llTop;
private AbsoluteLayout m_alTop;
private Button m_btnAddView, m_btnRemove;
private Context m_context;
@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.main_layout);
m_context = this;
m_prevX = 0;
m_prevY = 0;
m_imgXB = 50;
m_imgYB = 100;
m_imgXC = 150;
m_imgYC = 100;
m_ivImage = (ImageView) findViewById(R.id.ivImage);
m_ivImage1 = (ImageView) findViewById(R.id.ivImage1);
m_llTop = (LinearLayout) findViewById(R.id.llTop);
m_alTop = (AbsoluteLayout) findViewById(R.id.alTop);
m_btnAddView = (Button) findViewById(R.id.btnAdd);
m_btnRemove = (Button) findViewById(R.id.btnRemove);
m_ivImage.setOnTouchListener(m_onTouchListener);
m_ivImage1.setOnTouchListener(m_onTouchListener);
m_btnAddView.setOnClickListener(m_onClickListener);
m_btnRemove.setOnClickListener(m_onClickListener);
}
OnClickListener m_onClickListener = new OnClickListener(){
@Override
public void onClick(View p_v)
{
switch (p_v.getId())
{
case R.id.btnAdd:
addView();
break;
case R.id.btnRemove:
removeView();
break;
default:
break;
}
}
};
OnTouchListener m_onTouchListener = new OnTouchListener(){
@Override
public boolean onTouch(View p_v, MotionEvent p_event)
{
switch (p_event.getAction())
{
case MotionEvent.ACTION_DOWN:
{
m_lastTouchX = p_event.getX();
m_lastTouchY = p_event.getY();
break;
}
case MotionEvent.ACTION_UP:
{
break;
}
case MotionEvent.ACTION_MOVE:
{
m_dx = p_event.getX() - m_lastTouchX;
m_dy = p_event.getY() - m_lastTouchY;
m_posX = m_prevX + m_dx;
m_posY = m_prevY + m_dy;
if (m_posX > 0 && m_posY > 0 && (m_posX + p_v.getWidth()) < m_alTop.getWidth() && (m_posY + p_v.getHeight()) < m_alTop.getHeight())
{
p_v.setLayoutParams(new AbsoluteLayout.LayoutParams(p_v.getMeasuredWidth(), p_v.getMeasuredHeight(), (int) m_posX, (int) m_posY));
m_prevX = m_posX;
m_prevY = m_posY;
}
break;
}
}
return true;
}
};
/**
* Add view dynamically for drag and drop
*/
private void addView()
{
ImageView m_img = new ImageView(m_context);
TextView m_tv=new TextView(m_context);
if (m_counter < 5)
{
if (m_counter % 2 == 0)
{
m_img.setBackgroundResource(R.drawable.bol_green);
m_tv.setText("Hello! Drag Me! ");
m_alTop.addView(m_tv, new LayoutParams(android.view.ViewGroup.LayoutParams.WRAP_CONTENT, android.view.ViewGroup.LayoutParams.WRAP_CONTENT, ((int) m_imgXB), ((int) m_imgYB)));
m_alTop.addView(m_img, new LayoutParams(android.view.ViewGroup.LayoutParams.WRAP_CONTENT, android.view.ViewGroup.LayoutParams.WRAP_CONTENT, ((int) m_imgXB), ((int) m_imgYB)));
}
else
{
m_img.setBackgroundResource(R.drawable.bol_paars);
m_alTop.addView(m_img, new LayoutParams(android.view.ViewGroup.LayoutParams.WRAP_CONTENT, android.view.ViewGroup.LayoutParams.WRAP_CONTENT, ((int) m_imgXC), ((int) m_imgYC)));
}
m_counter++;
if (m_counter == 5)
m_btnAddView.setEnabled(false);
}
m_img.setOnTouchListener(m_onTouchListener);
m_tv.setOnTouchListener(m_onTouchListener);
}
public void removeView()
{
m_counter = 0;
m_alTop.removeAllViews();
m_alTop.invalidate();
m_btnAddView.setEnabled(true);
}
}
main_layout.xml
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools" android:id="@+id/llTop"
android:layout_width="fill_parent" android:layout_height="fill_parent"
android:orientation="vertical" > <AbsoluteLayout
android:id="@+id/alTop" android:layout_width="fill_parent"
android:layout_height="0dp" android:layout_margin="10dp"
android:layout_weight=".70" > <ImageView android:id="@+id/ivImage"
android:layout_width="wrap_content"
android:layout_height="wrap_content" android:layout_marginTop="10dp"
android:src="@drawable/ic_menu_share" android:visibility="gone" />
<ImageView android:id="@+id/ivImage1"
android:layout_width="wrap_content"
android:layout_height="wrap_content" android:layout_marginLeft="10dp"
android:layout_marginTop="10dp" android:layout_x="193dp"
android:layout_y="29dp" android:src="@drawable/ic_launcher" />
</AbsoluteLayout> <LinearLayout android:layout_width="wrap_content"
android:layout_height="0dp" android:layout_gravity="center"
android:layout_weight=".30" > <Button android:id="@+id/btnAdd"
android:layout_width="wrap_content"
android:layout_height="wrap_content" android:layout_marginTop="10dp"
android:text="Add View" /> <Button android:id="@+id/btnRemove"
android:layout_width="wrap_content"
android:layout_height="wrap_content" android:layout_marginTop="10dp"
android:text="Remove View" android:visibility="visible" />
</LinearLayout> </LinearLayout>
这是边界文件xml代码，它显示了对象移动的布局边框。
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item>
<shape>
<stroke android:width="1dp" android:color="#000000"/>
<corners
android:topLeftRadius="8dp" android:topRightRadius="8dp"
android:bottomLeftRadius="8dp" android:bottomRightRadius="8dp"/>
<padding android:left="0dp" android:top="0dp" android:right="0dp"
android:bottom="0dp"/> <gradient android:angle="270"
android:endColor="#FFFFFF" android:startColor="#FFFFFF"
android:type="linear" android:centerColor="#FFFFFF"/>
</shape>
</item>
</selector>