如何在Android中的导航抽屉活动中选择时打开新屏幕

Question

Im very new for android.. I created simple project, Im using Navigation drawer. If i choose anyone option from that navigation means its overwrite in Mainactivity Screen. Because i wrote everything in Mainactivity.java. I want If i choose anyone option means its shows in new screen if i click back shows previous screen.. How to do.. Please anyone help me!

Thanks for advance!

My code here: MainActivity.java

 import android.app.Activity; import java.text.DateFormat; import java.util.ArrayList; import java.util.Calendar; import java.util.List; import java.util.Locale; import android.app.DatePickerDialog; import android.app.Dialog; import android.location.Address; import android.location.Geocoder; import android.support.v4.app.DialogFragment; import android.os.Bundle; import android.app.Fragment; import android.app.FragmentManager; import android.content.res.Configuration; import android.support.annotation.Nullable; import android.support.v4.app.ActionBarDrawerToggle; import android.support.v4.app.FragmentActivity; import android.support.v4.view.GravityCompat; import android.support.v4.widget.DrawerLayout; import android.util.Log; import android.view.LayoutInflater; import android.view.Menu; import android.view.MenuItem; import android.view.View; import android.view.ViewGroup; import android.widget.AdapterView; import android.widget.ArrayAdapter; import android.widget.AutoCompleteTextView; import android.widget.DatePicker; import android.widget.EditText; import android.widget.ListView; import android.widget.Spinner; import android.widget.TextView; import android.widget.Toast; public class MainActivity extends FragmentActivity { private DrawerLayout mDrawerLayout; private ListView mDrawerList; private ActionBarDrawerToggle mDrawerToggle; private CharSequence mDrawerTitle; private CharSequence mTitle; CustomDrawerAdapter adapter; List<DrawerItem> dataList; EditText mEdit; private String[] states; private Spinner spinner; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); /* setContentView(R.layout.fragment_layout_address);*/ /* String[] city= getResources().getStringArray(R.array.city); autoTextView = (AutoCompleteTextView) findViewById(R.id.city_autoCompleteTextView); ArrayAdapter<String> arrayAdapter = new ArrayAdapter<String>(this,android.R.layout.simple_list_item_1,city); autoTextView.setThreshold(1); autoTextView.setAdapter(arrayAdapter);*/ // Initializing dataList = new ArrayList<DrawerItem>(); mTitle = mDrawerTitle = getTitle(); mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout); mDrawerList = (ListView) findViewById(R.id.left_drawer); mDrawerLayout.setDrawerShadow(R.drawable.drawer_shadow, GravityCompat.START); // Add Drawer Item to dataList dataList.add(new DrawerItem(true)); // adding a spinner to the list - 0 dataList.add(new DrawerItem("Wallet")); // adding a header to the list - 1 dataList.add(new DrawerItem("Balance", R.drawable.ic_balance)); // - 2 dataList.add(new DrawerItem("Profile"));// adding a header to the list - 3 dataList.add(new DrawerItem("Personal", R.drawable.ic_account)); dataList.add(new DrawerItem("Work", R.drawable.ic_work)); dataList.add(new DrawerItem("Address", R.drawable.ic_home)); dataList.add(new DrawerItem("Vehicle", R.drawable.ic_car)); dataList.add(new DrawerItem("Preference", R.drawable.ic_pref)); dataList.add(new DrawerItem("Other Option")); // adding a header to the list dataList.add(new DrawerItem("About", R.drawable.ic_action_about)); dataList.add(new DrawerItem("Settings", R.drawable.ic_action_settings)); dataList.add(new DrawerItem("Help", R.drawable.ic_action_help)); adapter = new CustomDrawerAdapter(this, R.layout.custom_drawer_item, dataList); mDrawerList.setAdapter(adapter); mDrawerList.setOnItemClickListener(new DrawerItemClickListener()); getActionBar().setDisplayHomeAsUpEnabled(true); getActionBar().setHomeButtonEnabled(true); mDrawerToggle = new ActionBarDrawerToggle(this, mDrawerLayout, R.drawable.ic_drawer, R.string.drawer_open, R.string.drawer_close) { public void onDrawerClosed(View view) { getActionBar().setTitle(mTitle); invalidateOptionsMenu(); // creates call to // onPrepareOptionsMenu() } public void onDrawerOpened(View drawerView) { getActionBar().setTitle(mDrawerTitle); invalidateOptionsMenu(); // creates call to // onPrepareOptionsMenu() } }; mDrawerLayout.setDrawerListener(mDrawerToggle); } //Calendar picker public void selectDate(View view) { DialogFragment newFragment = new SelectDateFragment(); newFragment.show(getSupportFragmentManager(), "DatePicker"); } public void populateSetDate(int year, int month, int day) { mEdit = (EditText)findViewById(R.id.dobText); mEdit.setText(month + "/" + day + "/" + year); } public class SelectDateFragment extends DialogFragment implements DatePickerDialog.OnDateSetListener { @Override public Dialog onCreateDialog(Bundle savedInstanceState) { final Calendar calendar = Calendar.getInstance(); int yy = calendar.get(Calendar.YEAR); int mm = calendar.get(Calendar.MONTH); int dd = calendar.get(Calendar.DAY_OF_MONTH); return new DatePickerDialog(getActivity(), this, yy, mm, dd); } public void onDateSet(DatePicker view, int yy, int mm, int dd) { populateSetDate(yy, mm + 1, dd); } } //Spinner @Override public boolean onCreateOptionsMenu(Menu menu) { // Inflate the menu; this adds items to the action bar if it is present. getMenuInflater().inflate(R.menu.main, menu); return true; } public void SelectItem(String item, int possition) { Fragment fragment = null; Bundle args = new Bundle(); switch(item) { case "Balance": fragment = new BalanceFragment(); break; case "Personal": fragment = new PersonalFragment(); break; case "Work": fragment = new WorkFragment(); break; case "Address": fragment = new AddressFragment(); break; case "Vehicle": fragment = new VehicleFragment(); break; case "Preference": fragment = new PreferenceFragment(); break; case "About": fragment = new AboutFragment(); break; case "Settings": fragment = new SettingsFragment(); break; case "Help": fragment = new HelpFragment(); break; default: fragment = new DefaultFragment(); break; } fragment.setArguments(args); FragmentManager frgManager = getFragmentManager(); frgManager.beginTransaction().replace(R.id.content_frame, fragment) .commit(); mDrawerList.setItemChecked(possition, true); setTitle(dataList.get(possition).getItemName()); mDrawerLayout.closeDrawer(mDrawerList); } @Override public void setTitle(CharSequence title) { mTitle = title; getActionBar().setTitle(mTitle); } @Override protected void onPostCreate(Bundle savedInstanceState) { super.onPostCreate(savedInstanceState); // Sync the toggle state after onRestoreInstanceState has occurred. mDrawerToggle.syncState(); } @Override public void onConfigurationChanged(Configuration newConfig) { super.onConfigurationChanged(newConfig); // Pass any configuration change to the drawer toggles mDrawerToggle.onConfigurationChanged(newConfig); } @Override public boolean onOptionsItemSelected(MenuItem item) { // The action bar home/up action should open or close the drawer. // ActionBarDrawerToggle will take care of this. if (mDrawerToggle.onOptionsItemSelected(item)) { return true; } return false; } private class DrawerItemClickListener implements ListView.OnItemClickListener { @Override public void onItemClick(AdapterView<?> parent, View view, int position, long id) { if (dataList.get(position).getTitle() == null) { SelectItem(dataList.get(position).getItemName(), position); } } } } 

Answer 1

Look at the selectItem function.

Just replace lines frgManager.beginTransaction().replace(R.id.content_frame, fragment).commit();

with

final FragmentTransaction transaction = getSupportFragmentManager().beginTransaction(); transaction.replace(R.id.content_frame, fragment); transaction.addToBackStack("backAgain"); transaction.commit();