我有一个字典应用程序的代码。如果用户单击搜索框中的列表项，我想显示带有两个按钮的对话框。但我在模拟器中测试它不会出现。我使用以下代码创建字典应用程序。这只是 MainActivity 类。
我的代码：
public class Shower extends Activity {
private TextView mTextView;
private ListView mListView;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_shower);
mTextView = (TextView) findViewById(R.id.text);
mListView = (ListView) findViewById(R.id.list);
handleIntent(getIntent());
}
@Override
protected void onNewIntent(Intent intent) {
// Because this activity has set launchMode="singleTop", the system calls this method
// to deliver the intent if this actvity is currently the foreground activity when
// invoked again (when the user executes a search from this activity, we don't create
// a new instance of this activity, so the system delivers the search intent here)
handleIntent(intent);
}
private void handleIntent(Intent intent) {
if (Intent.ACTION_VIEW.equals(intent.getAction())) {
// handles a click on a search suggestion; launches activity to show word
Intent wordIntent = new Intent(this, WordActivity.class);
wordIntent.setData(intent.getData());
startActivity(wordIntent);
finish();
} else if (Intent.ACTION_SEARCH.equals(intent.getAction())) {
// handles a search query
String query = intent.getStringExtra(SearchManager.QUERY);
showResults(query);
}
}
/**
* Searches the dictionary and displays results for the given query.
* @param query The search query
*/
private void showResults(String query) {
Cursor cursor = managedQuery(DictionaryProvider.CONTENT_URI, null, null,
new String[] {query}, null);
if (cursor == null) {
// There are no results
mTextView.setText(getString(R.string.no_results, new Object[] {query}));
} else {
// Display the number of results
int count = cursor.getCount();
String countString = getResources().getQuantityString(R.plurals.search_results,
count, new Object[] {count, query});
mTextView.setText(countString);
// Specify the columns we want to display in the result
String[] from = new String[] { DictionaryDatabase.KEY_WORD,
DictionaryDatabase.KEY_DEFINITION };
// Specify the corresponding layout elements where we want the columns to go
int[] to = new int[] { R.id.word,
R.id.definition };
// Create a simple cursor adapter for the definitions and apply them to the ListView
SimpleCursorAdapter words = new SimpleCursorAdapter(this,
R.layout.result, cursor, from, to);
mListView.setAdapter(words);
// Define the on-click listener for the list items
mListView.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
// Build the Intent used to open WordActivity with a specific word Uri
// Intent wordIntent = new Intent(getApplicationContext(), WordActivity.class);
//Uri data = Uri.withAppendedPath(DictionaryProvider.CONTENT_URI,
// String.valueOf(id));
// wordIntent.setData(data);
//startActivity(wordIntent);
String title="Dictionary";
String message="definition";
AlertDialog.Builder dialog = new AlertDialog.Builder(Shower.this);
dialog.setTitle(title);
dialog.setMessage(message);
dialog.setCancelable(false);
dialog.setPositiveButton("Dictionary",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
Intent wordIntent = new Intent(getApplicationContext(), WordActivity.class);
Uri data = Uri.withAppendedPath(DictionaryProvider.CONTENT_URI,
String.valueOf(id));
wordIntent.setData(data);
startActivity(wordIntent);
}
}) ;
dialog.setNegativeButton("definition",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
dialog.dismiss();
}
});
dialog.show();
}
});
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
//getMenuInflater().inflate(R.menu.activity_shower, menu);
// return true;
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.activity_shower, menu);
SearchManager searchManager = (SearchManager) getSystemService(Context.SEARCH_SERVICE);
SearchView searchView = (SearchView) menu.findItem(R.id.search).getActionView();
searchView.setSearchableInfo(searchManager.getSearchableInfo(getComponentName()));
searchView.setIconifiedByDefault(false);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case R.id.search:
onSearchRequested();
return true;
default:
return false;
}
}
}