android 超简单的拖动按钮 悬浮按钮 吸附按钮
android 超简单的拖动按钮 悬浮按钮 吸附按钮
第一种
第二种
第一种实现方法
xml布局
<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:orientation="vertical" >
<Button
android:id="@+id/startBtn"
android:layout_width="35dp"
android:layout_height="35dp"
android:layout_centerInParent="true"
android:background="@drawable/addstock" />
</RelativeLayout>
Activity调用
DisplayMetrics dm = getResources().getDisplayMetrics();
screenWidth = dm.widthPixels;
screenHeight = dm.heightPixels;
// Toast.makeText(getActivity(), screenWidth + "==" + screenHeight + "="
// + vHeight, 0).show();
// 拖动的按钮
btn = (Button) view.findViewById(R.id.startBtn);
btn.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
if (bool) {
LatestNetDataPackage lnPackage = new LatestNetDataPackage(R.string.COMMAND_LATESTNET, fundKind, sortType,
requestType, curPage, FUND_COUNT, 0);
dataPackage = lnPackage;
NetWorkTaskManager.addRequestToRequestCache(lnPackage, HListViewFragment.this, HListViewFragment.this,
getActivity());
btn.setBackgroundResource(R.drawable.deletestock);
bool = false;
} else {
LatestNetDataPackage lnPackage = new LatestNetDataPackage(R.string.COMMAND_LATESTNET, fundKind, sortType,
requestType, curPage, FUND_COUNT, 1);
dataPackage = lnPackage;
NetWorkTaskManager.addRequestToRequestCache(lnPackage, HListViewFragment.this, HListViewFragment.this,
getActivity());
btn.setBackgroundResource(R.drawable.addstock);
bool = true;
}
}
});
btn.setOnTouchListener(new OnTouchListener() {
int lastX, lastY; // 记录移动的最后的位置
private int btnHeight;
public boolean onTouch(View v, MotionEvent event) {
// 获取Action
int ea = event.getAction();
switch (ea) {
case MotionEvent.ACTION_DOWN: // 按下
lastX = (int) event.getRawX();
lastY = (int) event.getRawY();
screenWidth = view.getWidth();
screenHeight = view.getHeight();
btnHeight = btn.getHeight();
// Toast.makeText(getActivity(), "ACTION_DOWN：" + lastX + ",
// " + lastY, 0).show();
break;
case MotionEvent.ACTION_MOVE: // 移动
// 移动中动态设置位置
int dx = (int) event.getRawX() - lastX;
int dy = (int) event.getRawY() - lastY;
int left = v.getLeft() + dx;
int top = v.getTop() + dy;
int right = v.getRight() + dx;
int bottom = v.getBottom() + dy;
if (left < 0) {
left = 0;
right = left + v.getWidth();
}
if (right > screenWidth) {
right = screenWidth;
left = right - v.getWidth();
}
if (top < 0) {
top = 0;
bottom = top + v.getHeight();
}
if (bottom > screenHeight) {
bottom = screenHeight;
top = bottom - v.getHeight();
}
v.layout(left, top, right, bottom);
// Toast.makeText(getActivity(), "position：" + left + ", " +
// top + ", " + right + ", " + bottom, 0)
// .show();
// 将当前的位置再次设置
lastX = (int) event.getRawX();
lastY = (int) event.getRawY();
break;
case MotionEvent.ACTION_UP: // 抬起
// 向四周吸附
// int dx1 = (int) event.getRawX() - lastX;
// int dy1 = (int) event.getRawY() - lastY;
// int left1 = v.getLeft() + dx1;
// int top1 = v.getTop() + dy1;
// int right1 = v.getRight() + dx1;
// int bottom1 = v.getBottom() + dy1;
// if (left1 < (screenWidth / 2)) {
// if (top1 < 100) {
// v.layout(left1, 0, right1, btnHeight);
// } else if (bottom1 > (screenHeight - 200)) {
// v.layout(left1, (screenHeight - btnHeight), right1, screenHeight);
// } else {
// v.layout(0, top1, btnHeight, bottom1);
// }
// } else {
// if (top1 < 100) {
// v.layout(left1, 0, right1, btnHeight);
// } else if (bottom1 > (screenHeight - 200)) {
// v.layout(left1, (screenHeight - btnHeight), right1, screenHeight);
// } else {
// v.layout((screenWidth - btnHeight), top1, screenWidth, bottom1);
// }
// }
// break;
}
return false;
}
});
view指的是布局第二种实现方法
xml布局
<com.ui.view.DragFrameLayout
android:id="@+id/becausefloat"
android:layout_width="fill_parent"
android:layout_height="0.0dp"
android:layout_gravity="center_vertical"
android:layout_weight="1" >
<FrameLayout
android:id="@+id/container"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1" />
<ImageView
android:id="@+id/dragImg"
android:layout_width="35dp"
android:layout_height="35dp"
android:background="@drawable/deletestock" />
</com.ui.view.DragFrameLayout>
自定义控件 com.ui.view.DragFrameLayout
package com.ui.view;
import com.ui.R;
import android.content.Context;
import android.graphics.Rect;
import android.location.Location;
import android.util.AttributeSet;
import android.util.Log;
import android.view.MotionEvent;
import android.view.View;
import android.view.ViewConfiguration;
import android.widget.FrameLayout;
public class DragFrameLayout extends FrameLayout {
private View view;
private int width, heigh;
private int screenWid, screenHei;
private boolean isClickDrag = false;
private boolean isTouchDrag = false;
private float startX, startY;
private CheckClick checkClick = new CheckClick();
private DragImageClickListener dragImageListener;
public DragImageClickListener getDragImageListener() {
return dragImageListener;
}
public void setDragImageListener(DragImageClickListener dragImageListener) {
this.dragImageListener = dragImageListener;
}
public interface DragImageClickListener {
public abstract void onClick();
}
private class CheckClick implements Runnable {
@Override
public void run() {
// TODO Auto-generated method stub
isClickDrag = false;
Log.i("drag", "=====checkTap====");
}
}
public DragFrameLayout(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
// TODO Auto-generated constructor stub
}
public DragFrameLayout(Context context, AttributeSet attrs) {
super(context, attrs);
// TODO Auto-generated constructor stub
}
public void dragInit(View view) {
screenWid = getWidth();
screenHei = getHeight();
width = view.getWidth();
heigh = view.getHeight();
}
@Override
public boolean onInterceptTouchEvent(MotionEvent ev) {
// TODO Auto-generated method stub
switch (ev.getAction()) {
case MotionEvent.ACTION_DOWN:
float x = ev.getX();
float y = ev.getY();
Rect frame = new Rect();
if (view == null) {
view = findViewById(R.id.dragImg);
dragInit(view);
}
view.getHitRect(frame);
if (frame.contains((int) (x), (int) (y))) {
isTouchDrag = true;
startX = x;
startY = y;
return true;
}
break;
}
return false;
}
@Override
protected void onLayout(boolean changed, int left, int top, int right,
int bottom) {
super.onLayout(changed, left, top, right, bottom);
}
@Override
public boolean onTouchEvent(MotionEvent event) {
// TODO Auto-generated method stub
float x = event.getX();
float y = event.getY();
Rect frame = new Rect();
switch (event.getAction()) {
case MotionEvent.ACTION_DOWN:
view.getHitRect(frame);
if (frame.contains((int) (x), (int) (y))) {
startX = x;
startY = y;
isTouchDrag = true;
isClickDrag = true;
postDelayed(checkClick, ViewConfiguration.getTapTimeout());
}
break;
case MotionEvent.ACTION_MOVE:
float distanX = Math.abs(x - startX);
float distanY = Math.abs(y - startY);
if (Math.sqrt(distanY * distanY + distanX * distanX) > 10) {
isClickDrag = false;
}
move(x, y);
break;
case MotionEvent.ACTION_CANCEL:
isClickDrag = false;
isTouchDrag = false;
break;
case MotionEvent.ACTION_UP:
if (isClickDrag == true) {
dragImageListener.onClick();
removeCallbacks(checkClick);
}
isClickDrag = false;
isTouchDrag = false;
// 这段是把控件吸附四周
// if (x > width && x < screenWid - width && y > heigh
// && y < screenHei - heigh) {
// int minType = minDIstance(x, y);
// Log.i("tags", screenHei + "==mintype=" + minType);
// switch (minType) {
// case LEFT:
// x = width;
// break;
// case RIGHT:
// x = screenWid - width;
// break;
// case TOP:
// y = heigh;
// break;
// case BOTTOM:
// y = screenHei - heigh;
// break;
// default:
// break;
// }
// move(x, y);
// }
break;
case MotionEvent.ACTION_OUTSIDE:
isClickDrag = false;
isTouchDrag = false;
break;
}
return true;
}
private final static int LEFT = 1;
private final static int RIGHT = 2;
private final static int TOP = 3;
private final static int BOTTOM = 4;
private int minDIstance(float x, float y) {
Log.i("tags", "x=" + x + "==y=" + y);
boolean left, top;
if (x <= (screenWid - x)) {
left = true;
} else {
left = false;
}
if (y <= (screenHei - y)) {
top = true;
} else {
top = false;
}
if(left&&top){
if(x<=y){
return LEFT;
}else{
return TOP;
}
}
if(left&&(!top)){
if(x<=(screenHei-y)){
return LEFT;
}else{
return BOTTOM;
}
}
if((!left)&top){
if((screenWid-x)<= y){
return RIGHT;
}else{
return TOP;
}
}
if((!left)&(!top)){
if((screenWid-x)<= (screenHei-y)){
return RIGHT;
}else{
return BOTTOM;
}
}
return 0;
}
private void move(float x, float y) {
int left = (int) (x - width / 2);
int top = (int) (y - heigh / 2);
if (left <= 0)
left = 0;
if (top <= 0)
top = 0;
if (left > screenWid - width)
left = screenWid - width;
if (top > screenHei - heigh)
top = screenHei - heigh;
FrameLayout.LayoutParams params = (FrameLayout.LayoutParams) view
.getLayoutParams();
params.setMargins(left, top, (screenWid - left - width), (screenHei
- top - heigh));
view.setLayoutParams(params);
requestLayout();
}
public double getDistance(double lat1, double lon1, double lat2, double lon2) {
float[] results = new float[1];
Location.distanceBetween(lat1, lon1, lat2, lon2, results);
return results[0];
}
}
Activity调用方法
dragImg = (ImageView)findViewById(R.id.dragImg);
frameLayout = (DragFrameLayout)findViewById(R.id.becausefloat);
frameLayout.setDragImageListener(new DragImageClickListener() {
private boolean isDaix;
@Override
public void onClick() {
// TODO Auto-generated method stub
if (isDaix) {
dragImg.setBackgroundResource(R.drawable.deletestock);
isDaix = false;
} else {
dragImg.setBackgroundResource(R.drawable.addstock);
isDaix = true;
}
Toast.makeText(MainActivity.this, "点击",
Toast.LENGTH_LONG).show();
}
});