Fragment startet kein anderes Fragment in Android

Question

Ich habe ein Anmeldefragment, wenn der Benutzer zum ersten Mal zu meiner Anwendung kommt. Ich habe den Benutzernamen und das Passwort übernommen und darin gespeichert SharedPref.Damit er beim nächsten Mal den Benutzernamen und das Passwort nicht erneut eingeben muss.

Aber was passiert, es wird nichts angezeigt, es wird nur eine leere Aktivität angezeigt, selbst das Layout-Design, das nicht angezeigt wird.

Mein Login-FragmentActivity-Code

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;
    }

StartAktivität

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();
    }

DashBoardFragment

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;
    }
}

Manifest.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>

Ich erhalte diese Ausnahme

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)

*Hauptfragment *

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;
    }
}

Das Problem besteht darin, dass eine leere Seite angezeigt wird

Answer 1

Ihre Klasse sollte danach sein generasacodicetagpre.

Answer 2

Wie dein static final String[] DASHBOARD_LINKS = new String[] { }; Das Array enthält keine Werte, daher ist es nicht der Grund, Daten in Ihr Array zu binden GridView.

Fügen Sie einige Daten zu Ihrem String-Array hinzu und binden Sie sie dann in Ihr Array ein GridView Adapter.