这里只是简单讲述原理,实现很简单功能,有兴趣的读者可自行优化修改
布局文件
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical" > <ListView android:id="@+id/data_list" android:layout_width="match_parent" android:divider="@android:color/black" android:dividerHeight="0.65dip" android:layout_height="wrap_content" > </ListView> <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:id="@+id/data_empty_li" android:orientation="vertical" android:gravity="center" > <ImageView android:layout_marginTop="100dip" android:id="@+id/imageView1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:src="@drawable/ic_launcher" /> <TextView android:id="@+id/textView1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginTop="20dip" android:text="Click to Refresh" /> </LinearLayout> </LinearLayout>
关键代码
public class WindowTipActivity extends Activity implements OnClickListener, OnItemLongClickListener, OnTouchListener { private ListView mListView; private ViewGroup mNoDataPanel; private final List<String> dataList = new ArrayList<String>(); private Point pRaw = new Point(); @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.wintip_list_layout); mListView = (ListView) findViewById(R.id.data_list); mNoDataPanel = (ViewGroup) findViewById(R.id.data_empty_li); mListView.setAdapter(new ArrayAdapter<String>(this,android.R.layout.simple_list_item_1 , dataList)); mListView.setEmptyView(mNoDataPanel); mNoDataPanel.setOnClickListener(this); mListView.setOnItemLongClickListener(this); mListView.setOnTouchListener(this); } @Override protected void onDestroy() { super.onDestroy(); } @Override public void onClick(View arg0) { if(dataList.size()>=20) { return; } for (int i = 1; i <=20; i++) { dataList.add("菜单-选项("+i+")"); } ArrayAdapter adapter = (ArrayAdapter) mListView.getAdapter(); adapter.notifyDataSetChanged(); } @Override public boolean onItemLongClick(AdapterView<?> parent, View v, int position,long itemId) { LinearLayout layout = new LinearLayout(this); layout.setGravity(Gravity.CENTER); layout.setBackgroundColor(Color.GRAY); TextView tv = new TextView(this); tv.setLayoutParams(new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT)); tv.setText(dataList.get(position)); tv.setTextColor(Color.WHITE); tv.setSingleLine(true); layout.addView(tv); Paint p = new Paint(Paint.ANTI_ALIAS_FLAG); PopupWindow popupWindow = new PopupWindow(layout,200,v.getHeight()); popupWindow.setFocusable(true); popupWindow.setOutsideTouchable(true); popupWindow.setBackgroundDrawable(new BitmapDrawable()); int[] location = new int[2]; v.getLocationOnScreen(location); popupWindow.showAtLocation(v, Gravity.NO_GRAVITY,parent.getWidth()/2-100 , location[1]-popupWindow.getHeight()); return false; } @Override public boolean onTouch(View v, MotionEvent event) { if(event.getAction()==MotionEvent.ACTION_DOWN) { int x = (int) event.getRawX(); int y = (int) event.getRawY(); pRaw.set(x, y); Log.d("onTouch", "x="+x+" , y="+y); } return false; } }
效果如下
时间: 2024-10-04 11:15:57