android自定义多选对话框

package com.lnb.dialog; import android.app.Dialog; import android.content.Context; import android.os.Bundle; import android.view.KeyEvent; import android.view.Menu; import android.view.MotionEvent; import android.view.View; import android.view.Window; import android.view.WindowManager; import android.widget.AdapterView; import android.widget.GridView; /** * Corpus selection dialog. */ public class CorpusSelectionDialog extends Dialog { private static final int NUM_COLUMNS = 4; private GridView mCorpusGrid; private OnCorpusSelectedListener mListener; protected CorporaAdapter mAdapter; public CorpusSelectionDialog(Context context, int theme) { super(context, theme); } /** * Shows the corpus selection dialog. * * @param corpus The currently selected corpus. */ public void show(Corpus corpus) { show(); } public void setOnCorpusSelectedListener(OnCorpusSelectedListener listener) { mListener = listener; } @Override protected void onCreate(Bundle savedInstanceState) { mCorpusGrid = (GridView) findViewById(R.id.corpus_grid); mCorpusGrid.setNumColumns(NUM_COLUMNS); mCorpusGrid.setOnItemClickListener(new CorpusClickListener()); // for some reason, putting this in the XML layout instead makes // the list items unclickable. mCorpusGrid.setFocusable(true); Window window = getWindow(); WindowManager.LayoutParams lp = window.getAttributes(); lp.width = WindowManager.LayoutParams.MATCH_PARENT; lp.height = WindowManager.LayoutParams.MATCH_PARENT; // Put window on top of input method lp.flags |= WindowManager.LayoutParams.FLAG_ALT_FOCUSABLE_IM; window.setAttributes(lp); window.setTitle(getContext().getText(R.string.select_category_title)); setTitle(R.string.select_category_title); } @Override protected void onStart() { super.onStart(); } @Override protected void onStop() { setAdapter(null); super.onStop(); } @Override public boolean onCreateOptionsMenu(Menu menu) { super.onCreateOptionsMenu(menu); return true; } @Override public boolean onTouchEvent(MotionEvent event) { if (event.getAction() == MotionEvent.ACTION_DOWN) { // Cancel dialog on any touch down event which is not handled by the corpus grid cancel(); return true; } return false; } @Override public boolean onKeyDown(int keyCode, KeyEvent event) { boolean handled = super.onKeyDown(keyCode, event); if (handled) { return handled; } // Dismiss dialog on up move when nothing, or an item on the top row, is selected. if (keyCode == KeyEvent.KEYCODE_DPAD_UP) { int selectedRow = mCorpusGrid.getSelectedItemPosition() / NUM_COLUMNS; if (selectedRow <= 0) { cancel(); return true; } } // Dismiss dialog when typing on hard keyboard (soft keyboard is behind the dialog, // so that can't be typed on) if (event.isPrintingKey()) { cancel(); return true; } return false; } @Override public void onBackPressed() { cancel(); } protected void setAdapter(CorporaAdapter adapter) { if (adapter == mAdapter) return; if (mAdapter != null) mAdapter.close(); mAdapter = adapter; mCorpusGrid.setAdapter(mAdapter); } protected void selectCorpus(Corpus corpus) { dismiss(); if (mListener != null) { mListener.onCorpusSelected(corpus); } } private class CorpusClickListener implements AdapterView.OnItemClickListener { public void onItemClick(AdapterView<?> parent, View view, int position, long id) { Corpus corpus = (Corpus) parent.getItemAtPosition(position); selectCorpus(corpus); } } public interface OnCorpusSelectedListener { void onCorpusSelected(Corpus corpus); } public void refreshCorpus(){ } }