Android拖拽交换控件

package com.drag.activity; import java.util.ArrayList; import java.util.HashMap; import java.util.List; import java.util.Map; import android.app.Activity; import android.graphics.Bitmap; import android.graphics.drawable.BitmapDrawable; import android.os.Bundle; import android.util.DisplayMetrics; import android.util.Log; import android.view.MotionEvent; import android.view.View; import android.view.View.OnTouchListener; import android.widget.ImageView; import android.widget.RelativeLayout; import android.widget.RelativeLayout.LayoutParams; import android.widget.TextView; public class DragTestActivity extends Activity { private final static String TAG="MyDebug"; private final static int COLUMN=2; private final static int ROW=3; private int containerWidth; private int containerHeight; private int row_width; private int column_height; private int unit_width; private int unit_height; private RelativeLayout drag_layout; private Map<Position,View> dragViewsMap; private List<Position> positions; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); DisplayMetrics dm = this.getResources().getDisplayMetrics(); this.containerWidth = dm.widthPixels; this.containerHeight = dm.heightPixels-70; this.row_width=this.containerWidth/COLUMN; this.column_height=this.containerHeight/ROW; Log.i(TAG, "this.containerWidth = "+this.containerWidth); Log.i(TAG, "this.containerHeight = "+this.containerHeight); Log.i(TAG, "this.row_width = "+this.row_width); Log.i(TAG, "this.column_height = "+this.column_height); this.drag_layout = (RelativeLayout) this.findViewById(R.id.relativeLayout_scenes); initDragViews(); locateViews(); } private void locateViews() { for(Position pos : this.positions) { this.locateView(null, pos); } } private void initDragViews() { this.positions = new ArrayList<Position>(); List<Bitmap> bmps = new ArrayList<Bitmap>(); bmps.add(((BitmapDrawable) (this.getResources().getDrawable(R.drawable.scene_bedroom))).getBitmap()); bmps.add(((BitmapDrawable) (this.getResources().getDrawable(R.drawable.scene_bathroom))).getBitmap()); bmps.add(((BitmapDrawable) (this.getResources().getDrawable(R.drawable.scene_diningroom))).getBitmap()); bmps.add(((BitmapDrawable) (this.getResources().getDrawable(R.drawable.scene_guestroom))).getBitmap()); bmps.add(((BitmapDrawable) (this.getResources().getDrawable(R.drawable.scene_kidsroom))).getBitmap()); bmps.add(((BitmapDrawable) (this.getResources().getDrawable(R.drawable.scene_kitchenroom))).getBitmap()); this.unit_height = bmps.get(0).getHeight() + 90; this.unit_width = bmps.get(0).getWidth(); Log.d(TAG, "unit_height = " + unit_height); Log.d(TAG, "unit_width = " + unit_width); this.dragViewsMap = new HashMap<Position, View>(); for (int i = 0; i < bmps.size(); i++) { Bitmap bmp = bmps.get(i); int row = i / COLUMN; int clmn = i % COLUMN; Position pos = new Position(row, clmn); final RelativeLayout unit_layout = (RelativeLayout) this.getLayoutInflater().inflate(R.layout.scene_unit_layout,null); ImageView drag_img = (ImageView) unit_layout.findViewById(R.id.imgview_drag_img); drag_img.setImageBitmap(bmp); TextView drag_txt = (TextView) unit_layout.findViewById(R.id.txtview_drag_text); drag_txt.setText("drag test " + i); unit_layout.setOnTouchListener(new OnTouchListener() { int lastX, lastY; Position originPos=Position.getEmptyPosition(); public boolean onTouch(View v, MotionEvent event) { // TODO Auto-generated method stub int action = event.getAction(); Log.i("TAG", "Touch:" + action); // Toast.makeText(DraftTest.this, "位置："+x+","+y, // Toast.LENGTH_SHORT).show(); if (action == MotionEvent.ACTION_DOWN) { Log.v("Drag", "MotionEvent.ACTION_DOWN"); lastX = (int) event.getRawX(); lastY = (int) event.getRawY(); originPos=getTouchPos(lastX, lastY); originPos=mappingPosition(originPos); Log.v("Drag", "lastX = " + lastX + " lastY = " + lastY); // v.layout(lastX, lastX/2, lastY, lastY/2); } /** * layout(l,t,r,b) l Left position, relative to parent t Top * position, relative to parent r Right position, relative * to parent b Bottom position, relative to parent * */ else if(action== MotionEvent.ACTION_MOVE) { Log.v("Drag", "MotionEvent.ACTION_MOVE"); int dx = (int) event.getRawX() - lastX; int dy = (int) event.getRawY() - lastY; Log.v("Drag", "dx = " + dx + " dy = " + dy); 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 > containerWidth) { right = containerWidth; left = right - v.getWidth(); } if (top < 0) { top = 0; bottom = top + v.getHeight(); } if (bottom > containerHeight) { bottom = containerHeight; top = bottom - v.getHeight(); } v.layout(left, top, right, bottom); Log.v("Drag", "position：" + left + ", " + top + ", " + right + ", " + bottom); lastX = (int) event.getRawX(); lastY = (int) event.getRawY(); } else if(action== MotionEvent.ACTION_UP) { Position pos = getTouchPos(lastX, lastY); move(unit_layout, originPos, pos); } return true; } }); this.positions.add(pos); Log.i(TAG, "put "+unit_layout.toString()+" in the dragViewsMap with the position : "+pos.toString()); this.dragViewsMap.put(pos, unit_layout); } } /**根据点击位置获取点击的控件坐标*/ private Position getTouchPos(int tx,int ty) { int pos_row=ty/this.column_height; int pos_clmn=tx/this.row_width; if(pos_row >= ROW-1) { pos_row=ROW-1; } if(pos_clmn>=COLUMN-1) { pos_clmn=COLUMN-1; } return new Position(pos_row, pos_clmn); } /** * 控件换位 * */ private void move(View view,Position fromPos,Position toPos) { Log.v(TAG, "move().....topos : "+toPos.toString()); toPos=this.mappingPosition(toPos); //判断换位顺序：是往上换位还是往下换位 int from_index=-1; int to_index=-1; for(int i=0;i<this.positions.size();i++) { Position pos = this.positions.get(i); if(pos.getRow()==fromPos.getRow()&&pos.getClmn()==fromPos.getClmn()) { from_index=i; } if(pos.getRow()==toPos.getRow()&&pos.getClmn()==toPos.getClmn()) { to_index=i; } } if(to_index<from_index) //往上交换 { for(int i=from_index-1;i>=to_index;i--) { View moving_view = this.dragViewsMap.get(this.positions.get(i)); this.locateView(moving_view, this.positions.get(i+1)); this.dragViewsMap.put(this.positions.get(i+1), moving_view); } //将拖动的控件放到目标坐标位置 this.locateView(view, toPos); this.dragViewsMap.put(toPos, view); } else //往下交换 { for(int i=from_index+1;i<=to_index;i++) { View moving_view = this.dragViewsMap.get(this.positions.get(i)); this.locateView(moving_view, this.positions.get(i-1)); this.dragViewsMap.put(this.positions.get(i-1), moving_view); } //将拖动的控件放到目标坐标位置 this.locateView(view, toPos); this.dragViewsMap.put(toPos, view); } } private Position mappingPosition(Position position) { for(Position pos : this.positions) { if(pos.getRow()==position.getRow()&&pos.getClmn()==position.getClmn()) { return pos; } } return null; } /**定位指定的控件*/ private void locateView(View view,Position pos) { Log.v(TAG, "locatView()..."+pos.toString()); boolean isInit=false; RelativeLayout.LayoutParams la