android 超简单的拖动按钮 悬浮按钮 吸附按钮 浮动按钮

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();
			}
		});