安全卫士第三天--21归属地控件拖动后记录位置
拖动后
public class DragViewActivity extends Activity implements OnTouchListener {
private static final String TAG = "DragViewActivity";
private ImageView iv_drag_view;
private TextView tv_drag_view;
int startx; // 记录下来第一次手指触摸屏幕的位置
int starty;
private SharedPreferences sp;
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
setContentView(R.layout.drag_view);
// Drawable drawable = new ColorDrawable(Color.RED);
// getWindow().setBackgroundDrawable(drawable);
iv_drag_view = (ImageView) this.findViewById(R.id.iv_drag_view);
tv_drag_view = (TextView) this.findViewById(R.id.tv_drag_view);
sp = getSharedPreferences("config", MODE_PRIVATE);
iv_drag_view.setOnTouchListener(this);
}
@Override
protected void onResume() {//控件显示出来,并且获取焦点后调用该方法
super.onResume();
// 重新加载上次imageview在窗体中的位置
int x = sp.getInt("lastx", 0);
int y = sp.getInt("lasty", 0);
Log.i(TAG, "x="+x);
Log.i(TAG, "y="+y);
// iv_drag_view.layout(iv_drag_view.getLeft()+x, iv_drag_view.getTop()+y, iv_drag_view.getRight()+x, iv_drag_view.getBottom()+y);
// // 重新渲染 这个view对象
// iv_drag_view.invalidate();
//通过布局 更改 iv_drag_view 在窗体中的位置
LayoutParams params = (LayoutParams) iv_drag_view.getLayoutParams();
params.leftMargin = x;
params.topMargin = y;
iv_drag_view.setLayoutParams(params);
}
public boolean onTouch(View v, MotionEvent event) {
switch (v.getId()) {
// 如果手指放在imageview上拖动
case R.id.iv_drag_view:
//
switch (event.getAction()) {
case MotionEvent.ACTION_DOWN:
startx = (int) event.getRawX(); // 获取手指第一次接触屏幕在x方向的坐标
starty = (int) event.getRawY();
break;
case MotionEvent.ACTION_MOVE: // 手指没有离开屏幕 在屏幕移动
int x = (int) event.getRawX();
int y = (int) event.getRawY();
if(y<240){
// tv_drag_view 设置textview在窗体的下面
tv_drag_view.layout(tv_drag_view.getLeft(), 260, tv_drag_view.getRight(), 280);
}else{
tv_drag_view.layout(tv_drag_view.getLeft(), 60, tv_drag_view.getRight(), 80);
}
//获取手指移动的距离
int dx = x-startx;
int dy = y-starty;
int l= iv_drag_view.getLeft();
int t= iv_drag_view.getTop();
int r = iv_drag_view.getRight();
int b = iv_drag_view.getBottom();
iv_drag_view.layout(l+dx, t+dy, r+dx, b+dy);
startx = (int) event.getRawX(); // 获取到移动后的位置
starty = (int) event.getRawY();
break;
case MotionEvent.ACTION_UP: // 手指离开屏幕对应的事件
Log.i(TAG,"手指离开屏幕");
// 记录下来最后 图片在窗体中的位置
int lasty = iv_drag_view.getTop();
int lastx = iv_drag_view.getLeft();
Editor editor = sp.edit();
editor.putInt("lastx", lastx);
editor.putInt("lasty", lasty);
editor.commit();
break;
}
break;
}
return true; // 不会中断触摸事件的返回,默认只执行一次。
}
}
xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#cc000000"
>
<ImageView
android:layout_width="160dip"
android:layout_height="60dip"
android:background="@drawable/button_background_selected"
android:id="@+id/iv_drag_view"
/>
<TextView
android:id="@+id/tv_drag_view"
android:layout_marginTop="80dip"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="按住绿色条拖动归属地显示的位置"
/>
</RelativeLayout>