Fragmento no inicia otro Fragmento en Android
https://stackoverflow.com//questions/21012026
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21-12-2019 - |
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Tengo un fragmento de inicio de sesión cuando el usuario accede por primera vez a mi aplicación. Solía tomar su nombre de usuario y contraseña y guardarlos en SharedPref.Para que la próxima vez no necesite ingresar nuevamente el nombre de usuario y la contraseña.
Pero lo que está sucediendo es que no muestra nada, solo muestra una actividad en blanco, incluso el diseño de diseño no se muestra.
Mi código de actividad de fragmento de inicio de sesión
public class Login extends FragmentActivity {
public static String url = "";
public static ProgressDialog progressDialog;
EditText username, password;
TextView error;
ImageView ok;
static String AppResponse = null;
ProgressDialog pd;
private Fragment dashboardFragment;
View rootView = null;
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
SharedPreferences shared = getSharedPreferences("shared", MODE_PRIVATE);
dashboardFragment = new DashBoardFragment();
if (shared.contains("username") && shared.contains("password")) {
startingActivity();
} else {
progressDialog = new ProgressDialog(this);
progressDialog.setMessage("Please Wait Validating .!!!");
progressDialog.setIndeterminate(false);
progressDialog.setProgressStyle(ProgressDialog.THEME_HOLO_DARK);
progressDialog.setCancelable(false);
rootView = inflater.inflate(R.layout.activity_login, container,
false);
username = (EditText) rootView.findViewById(R.id.textUserName);
password = (EditText) rootView.findViewById(R.id.textPassword);
ok = (ImageView) rootView.findViewById(R.id.btn_login);
error = (TextView) rootView.findViewById(R.id.error_view);
pd = new ProgressDialog(this);
pd.setMessage("Logging In");
ok.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
String pass = password.getText().toString();
String userId = username.getText().toString();
boolean isConnected = isNetworkConnected(Login.this);
Log.d("Network Status", "Status is " + isConnected);
if (userId.equals("") || pass.equals("")) {
error.setText("Please provide UserName and Password...!!!!!");
} else {
if (isConnected) {
postHttpRequest(userId, pass, error);
} else {
Toast.makeText(getApplicationContext(),
"No Network Connection", Toast.LENGTH_LONG)
.show();
}
}
}
});
}
return rootView;
}
Iniciar actividad
public void startingActivity() {
FragmentTransaction fragTran = getSupportFragmentManager()
.beginTransaction();
fragTran.replace(R.id.content_frame, dashboardFragment);
fragTran.setTransition(FragmentTransaction.TRANSIT_FRAGMENT_OPEN);
fragTran.addToBackStack(null);
fragTran.commit();
}
TableroFragmento
public class DashBoardFragment extends Fragment {
GridView gridView;
static final String[] DASHBOARD_LINKS = new String[] { };
private Fragment approvalStatusFragment;
private Fragment pendingApprovalsFragment;
private Fragment flghtBookingFragment;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.activity_dash_board,
container, false);
gridView = (GridView) rootView.findViewById(R.id.my_grid_view);
gridView.setAdapter(new ImageAdapter(getActivity(), DASHBOARD_LINKS));
approvalStatusFragment = new ApprovalStatus();
pendingApprovalsFragment = new PendingApprovals();
flghtBookingFragment = new FlightBooking();
final FragmentTransaction fragTran = getFragmentManager()
.beginTransaction();
gridView.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> arg0, View v, int arg2,
long arg3) {
if (DASHBOARD_LINKS[arg2].equals("Approvals")) {
fragTran.replace(R.id.content_frame, pendingApprovalsFragment);
fragTran.setTransition(FragmentTransaction.TRANSIT_FRAGMENT_OPEN);
fragTran.addToBackStack(null);
fragTran.commit();
}
if (DASHBOARD_LINKS[arg2].equals("Flights")) {
fragTran.replace(R.id.content_frame, flghtBookingFragment);
fragTran.setTransition(FragmentTransaction.TRANSIT_FRAGMENT_OPEN);
fragTran.addToBackStack(null);
fragTran.commit();
}
if (DASHBOARD_LINKS[arg2].equals("Trips")) {
fragTran.replace(R.id.content_frame, approvalStatusFragment);
fragTran.setTransition(FragmentTransaction.TRANSIT_FRAGMENT_OPEN);
fragTran.addToBackStack(null);
fragTran.commit();
}
}
});
return rootView;
}
}
manifiesto.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.iween.newinfiniteapp"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="17" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name="com.Login"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
Estoy recibiendo esta excepción
01-09 11:26:01.162: E/AndroidRuntime(4164): FATAL EXCEPTION: main
01-09 11:26:01.162: E/AndroidRuntime(4164): java.lang.IllegalArgumentException: No view found for id 0x7f09001e (com.iween.newinfiniteapp:id/content_frame) for fragment DashBoardFragment{412cfcf8 #0 id=0x7f09001e}
01-09 11:26:01.162: E/AndroidRuntime(4164): at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:919)
01-09 11:26:01.162: E/AndroidRuntime(4164): at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1104)
01-09 11:26:01.162: E/AndroidRuntime(4164): at android.support.v4.app.BackStackRecord.run(BackStackRecord.java:682)
01-09 11:26:01.162: E/AndroidRuntime(4164): at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1467)
01-09 11:26:01.162: E/AndroidRuntime(4164): at android.support.v4.app.FragmentManagerImpl$1.run(FragmentManager.java:440)
01-09 11:26:01.162: E/AndroidRuntime(4164): at android.os.Handler.handleCallback(Handler.java:800)
01-09 11:26:01.162: E/AndroidRuntime(4164): at android.os.Handler.dispatchMessage(Handler.java:100)
01-09 11:26:01.162: E/AndroidRuntime(4164): at android.os.Looper.loop(Looper.java:194)
01-09 11:26:01.162: E/AndroidRuntime(4164): at android.app.ActivityThread.main(ActivityThread.java:5371)
01-09 11:26:01.162: E/AndroidRuntime(4164): at java.lang.reflect.Method.invokeNative(Native Method)
01-09 11:26:01.162: E/AndroidRuntime(4164): at java.lang.reflect.Method.invoke(Method.java:525)
01-09 11:26:01.162: E/AndroidRuntime(4164): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:833)
01-09 11:26:01.162: E/AndroidRuntime(4164): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:600)
01-09 11:26:01.162: E/AndroidRuntime(4164): at dalvik.system.NativeStart.main(Native Method)
*Fragmento principal *
public class MainFragment extends FragmentActivity {
// Within which the entire activity is enclosed
private DrawerLayout mDrawerLayout;
// ListView represents Navigation Drawer
private ListView mDrawerList;
private Fragment dashboardFragment;
// ActionBarDrawerToggle indicates the presence of Navigation Drawer in the
// action bar
private ActionBarDrawerToggle mDrawerToggle;
// Title of the action bar
private String mTitle = "";
@SuppressLint("NewApi")
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main_fragment);
dashboardFragment = new DashBoardFragment();
mTitle = "Infinite Travels";
getActionBar().setTitle(mTitle);
getActionBar().setIcon(android.R.color.transparent);
// Getting reference to the DrawerLayout
mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);
mDrawerList = (ListView) findViewById(R.id.drawer_list);
// Getting reference to the ActionBarDrawerToggle
mDrawerToggle = new ActionBarDrawerToggle(this, mDrawerLayout,
R.drawable.white_bar, R.string.drawer_open,
R.string.drawer_close) {
/** Called when drawer is closed */
public void onDrawerClosed(View view) {
getActionBar().setTitle(mTitle);
invalidateOptionsMenu();
}
/** Called when a drawer is opened */
public void onDrawerOpened(View drawerView) {
// getActionBar().setTitle("");
invalidateOptionsMenu();
}
};
// Setting DrawerToggle on DrawerLayout
mDrawerLayout.setDrawerListener(mDrawerToggle);
if (savedInstanceState == null) {
getUrl(0);
}
// Creating an ArrayAdapter to add items to the listview mDrawerList
ArrayAdapter<String> adapter = new ArrayAdapter<String>(
getBaseContext(), R.layout.drawer_list_item, getResources()
.getStringArray(R.array.menus));
// Setting the adapter on mDrawerList
mDrawerList.setAdapter(adapter);
// Enabling Home button
getActionBar().setHomeButtonEnabled(true);
// Enabling Up navigation
getActionBar().setDisplayHomeAsUpEnabled(true);
// Setting item click listener for the listview mDrawerList
mDrawerList.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
// Getting an array of rivers
String[] menuItems = getResources().getStringArray(
R.array.menus);
// Currently selected river
mTitle = menuItems[position];
getUrl(position);
// Closing the drawer
mDrawerLayout.closeDrawer(mDrawerList);
}
});
}
@SuppressLint("Recycle")
protected void getUrl(int position) {
FragmentTransaction fragTran = getSupportFragmentManager()
.beginTransaction();
switch (position) {
case 0:
fragTran.replace(R.id.content_frame, dashboardFragment);
fragTran.setTransition(FragmentTransaction.TRANSIT_FRAGMENT_OPEN);
fragTran.addToBackStack(null);
fragTran.commit();
break;
case 1:
case 2:
case 3:
// return "";
case 4:
case 5:
case 6:
// return "";
default:
// return "";
}
}
@Override
protected void onPostCreate(Bundle savedInstanceState) {
super.onPostCreate(savedInstanceState);
mDrawerToggle.syncState();
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
if (mDrawerToggle.onOptionsItemSelected(item)) {
return true;
}
return super.onOptionsItemSelected(item);
}
/**
* Called whenever we call invalidateOptionsMenu()
* */
@Override
public boolean onPrepareOptionsMenu(Menu menu) {
// If the drawer is open, hide action items related to the content view
boolean drawerOpen = mDrawerLayout.isDrawerOpen(mDrawerList);
menu.findItem(R.id.action_settings).setVisible(!drawerOpen);
return super.onPrepareOptionsMenu(menu);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
}
El problema es que muestra una página en blanco.
Solución
Su clase debe ser así (FRAGMENTACTIVIDA NO TIENE EL MÉTODO DE ENCENDIDO ONCRETEVIET TIENE EL MÉTODO DE EXTRECE) SÓLO CAMBIAR EL MÉTODO MÉTODO ANTELOWVIEW A ONCREATE.
public class Login extends FragmentActivity {
public static String url = "";
public static ProgressDialog progressDialog;
EditText username, password;
TextView error;
ImageView ok;
static String AppResponse = null;
ProgressDialog pd;
private Fragment dashboardFragment;
View rootView = null;
@Override
protected Void onCreate(Bundle savedInstanceState) {
SharedPreferences shared = getSharedPreferences("shared", MODE_PRIVATE);
dashboardFragment = new DashBoardFragment();
if (shared.contains("username") && shared.contains("password")) {
startingActivity();
} else {
progressDialog = new ProgressDialog(this);
progressDialog.setMessage("Please Wait Validating .!!!");
progressDialog.setIndeterminate(false);
progressDialog.setProgressStyle(ProgressDialog.THEME_HOLO_DARK);
progressDialog.setCancelable(false);
setContentView(R.layout.activity_login);
username = (EditText) findViewById(R.id.textUserName);
password = (EditText) findViewById(R.id.textPassword);
ok = (ImageView) findViewById(R.id.btn_login);
error = (TextView) findViewById(R.id.error_view);
pd = new ProgressDialog(this);
pd.setMessage("Logging In");
ok.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
String pass = password.getText().toString();
String userId = username.getText().toString();
boolean isConnected = isNetworkConnected(Login.this);
Log.d("Network Status", "Status is " + isConnected);
if (userId.equals("") || pass.equals("")) {
error.setText("Please provide UserName and Password...!!!!!");
} else {
if (isConnected) {
postHttpRequest(userId, pass, error);
} else {
Toast.makeText(getApplicationContext(),
"No Network Connection", Toast.LENGTH_LONG)
.show();
}
}
}
});
}
}
Otros consejos
Como tu static final String[] DASHBOARD_LINKS = new String[] { }; La matriz no contiene valores, por lo que no es por eso que vincula ningún dato a su GridView.
Agregue algunos datos a su matriz de cadenas y luego vincúlelos a su GridView adaptador.
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