1 package cn.itcast.mobilesafe;
  2 
  3 import android.app.Activity;
  4 import android.content.SharedPreferences;
  5 import android.content.SharedPreferences.Editor;
  6 import android.os.Bundle;
  7 import android.os.Environment;
  8 import android.util.Log;
  9 import android.view.Display;
 10 import android.view.MotionEvent;
 11 import android.view.View;
 12 import android.view.View.OnClickListener;
 13 import android.view.View.OnTouchListener;
 14 import android.widget.EditText;
 15 import android.widget.FrameLayout;
 16 import android.widget.ImageView;
 17 import android.widget.RelativeLayout;
 18 import android.widget.RelativeLayout.LayoutParams;
 19 import android.widget.TextView;
 20 
 21 public class DragViewActiviy extends Activity {
 22     protected static final String TAG = "DragViewActiviy";
 23     private ImageView iv_dragview_location;
 24     private Display display;
 25     private TextView tv_dragview;
 26     private long firstTime;
 27     private SharedPreferences sp;
 28     @Override
 29     protected void onCreate(Bundle savedInstanceState) {
 30 
 31         super.onCreate(savedInstanceState);
 32         display = getWindowManager().getDefaultDisplay();
 33         sp = getSharedPreferences("config", MODE_PRIVATE);
 34         setContentView(R.layout.drag_view);
 35         iv_dragview_location = (ImageView) findViewById(R.id.iv_dragview_location);
 36         tv_dragview = (TextView) findViewById(R.id.tv_dragview);
 37         
 38         
 39         int lastx = sp.getInt("lastx", 0);
 40         int lasty = sp.getInt("lasty", 0);
 41         //只有當ui被完全渲染出來的時候 執行才有用.
 42         //iv_dragview_location.layout(l, t, r, b);
 43         //在oncreate方法里面 控件的位置 和大小現在還沒有被計算顯示出來.
 44         
 45         //在布局渲染的第一個階段進行的.
 46         RelativeLayout.LayoutParams params = (LayoutParams) iv_dragview_location.getLayoutParams();
 47         params.leftMargin = lastx;
 48         params.topMargin = lasty;
 49         iv_dragview_location.setLayoutParams(params);
 50         
 51         iv_dragview_location.setOnClickListener(new OnClickListener() {
 52 
 53             public void onClick(View v) {
 54                 Log.i(TAG, "哥被點擊了");
 55                 if (firstTime > 0) {// 已經點擊過了
 56                     long secondTime = System.currentTimeMillis();
 57                     long dtime = secondTime - firstTime;
 58                     if (dtime < 500) {
 59                         Log.i(TAG, "雙擊事件");
 60                         int tv_width = iv_dragview_location.getRight()
 61                                 - iv_dragview_location.getLeft();
 62                         int widowwidth = display.getWidth();
 63                         iv_dragview_location.layout(widowwidth / 2 - tv_width
 64                                 / 2, iv_dragview_location.getTop(), widowwidth
 65                                 / 2 + tv_width / 2,
 66                                 iv_dragview_location.getBottom());
 67 
 68                         int lastx = iv_dragview_location.getLeft();
 69                         int lasty = iv_dragview_location.getTop();
 70                         Editor editor = sp.edit();
 71                         editor.putInt("lastx", lastx);
 72                         editor.putInt("lasty",lasty);
 73                         editor.commit();
 74                         
 75                         
 76                     }
 77                 }
 78 
 79                 firstTime = System.currentTimeMillis();
 80                 new Thread() {// 單擊的超時處理
 81                     public void run() {
 82                         try {
 83                             Thread.sleep(500);
 84                             firstTime = 0;
 85                         } catch (InterruptedException e) {
 86                             // TODO Auto-generated catch block
 87                             e.printStackTrace();
 88                         }
 89                     };
 90                 }.start();
 91 
 92             }
 93         });
 94 
 95         iv_dragview_location.setOnTouchListener(new OnTouchListener() {
 96 
 97             int startX;// 記錄第一次手指在窗體中的位置.
 98             int startY;
 99 
100             public boolean onTouch(View v, MotionEvent event) {
101 
102                 switch (event.getAction()) {
103                 case MotionEvent.ACTION_DOWN:
104                     Log.i(TAG, "摸到");
105                     startX = (int) event.getRawX();
106                     startY = (int) event.getRawY();
107 
108                     break;
109                 case MotionEvent.ACTION_MOVE:
110                     Log.i(TAG, "移動");
111                     int movedX = (int) event.getRawX();
112                     int movedY = (int) event.getRawY();
113                     int dx = movedX - startX;
114                     int dy = movedY - startY;
115                     // 立刻的更新 imageview在窗體中的位置.
116                     int l = iv_dragview_location.getLeft();
117                     int t = iv_dragview_location.getTop(); // 得到imageview在窗體中上面的坐標
118                     int r = iv_dragview_location.getRight();
119                     int b = iv_dragview_location.getBottom();
120                     int tv_height = tv_dragview.getBottom()
121                             - tv_dragview.getTop();
122 
123                     if (t > (display.getHeight() / 2)) {// imageview 移動到了屏幕的下面
124                         // 更新 textview 設置在屏幕的上面
125                         tv_dragview.layout(tv_dragview.getLeft(), 0,
126                                 tv_dragview.getRight(), tv_height);
127 
128                     } else {
129                         // 更新 textview 設置在屏幕的下面
130                         tv_dragview.layout(tv_dragview.getLeft(),
131                                 display.getHeight() - tv_height - 15,
132                                 tv_dragview.getRight(),
133                                 display.getHeight() - 15);
134                     }
135                     int newl = l + dx;
136                     int  newr = r +dx;
137                     int  newt = t+dy;
138                     int newb = b+dy;
139                     if(newl < 0|| newr > display.getWidth() || newt < 0 || newb >display.getHeight()){
140                         break;
141                     }
142                     
143                     
144                     iv_dragview_location.layout(newl, newt, newr, newb);// 更新了iv在窗體中的位置
145 
146                     // 重新記錄新的手指的初始位置.
147                     startX = (int) event.getRawX();
148                     startY = (int) event.getRawY();
149 
150                     break;
151                 case MotionEvent.ACTION_UP:
152                     Log.i(TAG, "放手");
153                     int lastx = iv_dragview_location.getLeft();
154                     int lasty = iv_dragview_location.getTop();
155                     Editor editor = sp.edit();
156                     editor.putInt("lastx", lastx);
157                     editor.putInt("lasty",lasty);
158                     editor.commit();
159                     break;
160 
161                 }
162 
163                 return false;// 是否消費掉這個事件
164             }
165         });
166 
167     }
168 }