我正在使用ActivityGroup,我想在选择另一个选项卡时打开ActivityGroup的子活动.如果有可能,请有人告诉我吗？
示例 - 我有tab1,我使用ActivityGroup在同一个选项卡中打开一个subActivity(比如活动"A"),现在当我点击tab2时,我应该打开相同的活动"A"及其所有内容.
提前致谢.
海兰!
我有一个listview,应该填充数据库中的数据
码:
private void onCreateDBAndDBTabled() {
myDB = this.openOrCreateDatabase(MY_DB_NAME, MODE_PRIVATE, null);
myDB.execSQL("CREATE TABLE IF NOT EXISTS " + MY_DB_TABLE
+ " (_id integer primary key autoincrement, name varchar(100), rate integer(1), eattime datetime)"
+";");
ArrayList<Pizza> list = new ArrayList<Pizza>();
Cursor cursor = this.myDB.query(MY_DB_TABLE, new String[] { "name" },null,null,null,null,null,null);
if (cursor.moveToFirst()) {
do {
Log.e("XXX", "Courser Enter: " + cursor.getString(0));
Pizza pizza = new Pizza();
pizza.title= cursor.getString(0);
list.add(pizza);
}
while (cursor.moveToNext());
}
if (cursor != null && !cursor.isClosed()) {
cursor.close();
} …我正在使用a ProgressDialog来显示我的后台进程,但是在后台进程完成后,ProgressDialog仍然没有被解雇.
这是我的代码
private class async extends AsyncTask<String, Void, Boolean> {
final ProgressDialog progressDialog = new ProgressDialog(getParent());
@Override
protected Boolean doInBackground(String... params) {
GetJson json = new GetJson();
boolean success = false;
JSONObject mJsonObject = json
.readJsonObject("url");
try {
success = mJsonObject.getBoolean("success");
} catch (Exception e) {
}
return success;
}
@Override
protected void onPostExecute(Boolean result) {
if (result) {
if (progressDialog.isShowing())
progressDialog.dismiss();
}
}
}
@SuppressWarnings("static-access")
@Override
protected void onPreExecute() {
progressDialog.show(getParent(), "Working..", "Please wait...");
}
}
我在用
View root = findViewById(android.R.id.content);
root.setSystemUiVisibility(View.SYSTEM_UI_FLAG_FULLSCREEN);
使我的应用全屏显示。它工作正常，除非我使用Spinner。一旦下拉选项，系统栏就会再次出现。我试着用setSystemUIVisibility()对Spinner没有效果。
如何使我的应用始终保持全屏显示？
我怎么只在android应用程序中获取FileNotFoundException,当我从普通的Java应用程序中读取它时,它找到了该目录.
我正在使用相同的代码.
{
BufferedReader bufRdr;
contacts = new ArrayList<Contacts>();
File randomContactsFile = new File(("C://test//randomcontacts.txt"));
try {
bufRdr = new BufferedReader(new FileReader(randomContactsFile));
String line = null;
String[] a = new String[2];
while ((line = bufRdr.readLine()) != null)
{
a = line.split(",");
Contacts c = new Contacts(a[0], a[1], a[1], a[1], a[2]);
contacts.add(c);
}
} catch (FileNotFoundException e) {
Log.d("file not found", "check");
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
这是例外:
10-05 08:04:37.151: WARN/System.err(334):
java.io.FileNotFoundException: /C:/test/randomcontacts.txt (No …