java我遇到了代码的switch语句部分问题。它似乎没有带我到被点击的页面。只有仪表板显示，并且已经创建了每个布局，请
import android.app.FragmentManager;
import android.app.FragmentTransaction;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.net.Uri;
import android.os.AsyncTask;
import android.support.design.widget.NavigationView;
import android.support.v4.widget.DrawerLayout;
import android.support.v7.app.ActionBarDrawerToggle;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.support.v7.widget.Toolbar;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.SubMenu;
import android.view.View;
import android.widget.Toast;
import com.google.android.gms.appindexing.Action;
import com.google.android.gms.appindexing.AppIndex;
import com.google.android.gms.common.api.GoogleApiClient;
public class home extends AppCompatActivity {
//Defining Variables
private Toolbar toolbar;
private NavigationView navigationView;
private DrawerLayout drawerLayout;
/**
* ATTENTION: This was auto-generated to implement the App Indexing API.
* See https://g.co/AppIndexing/AndroidStudio for more information.
*/
private GoogleApiClient client;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_home);
// Initializing Toolbar and setting it as the actionbar
toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
//Initializing NavigationView
navigationView = (NavigationView) findViewById(R.id.navigation_view);
//Setting Navigation View Item Selected Listener to handle the item click of the navigation menu
navigationView.setNavigationItemSelectedListener(new NavigationView.OnNavigationItemSelectedListener() {
// This method will trigger on item Click of navigation menu
@Override
public boolean onNavigationItemSelected(MenuItem menuItem) {
//Checking if the item is in checked state or not, if not make it in checked state
if (menuItem.isChecked()) menuItem.setChecked(false);
else menuItem.setChecked(true);
//Closing drawer on item click
drawerLayout.closeDrawers();
//Check to see which item was being clicked and perform appropriate action
switch (menuItem.getItemId()) {
//Replacing the main content with ContentFragment Which is our Inbox View;
case R.id.dashboard:
Toast.makeText(getApplicationContext(), "Inbox Selected", Toast.LENGTH_SHORT).show();
Dashboard fragment = new Dashboard();
android.support.v4.app.FragmentTransaction fragmentTransaction = getSupportFragmentManager().beginTransaction();
fragmentTransaction.replace(R.id.frame, fragment);
fragmentTransaction.commit();
return true;
// For rest of the options we just show a toast on click
case R.id.profile:
Toast.makeText(getApplicationContext(), "Profile Selected", Toast.LENGTH_SHORT).show();
new Profile();
return true;
case R.id.logs:
Toast.makeText(getApplicationContext(), "Logs Selected", Toast.LENGTH_SHORT).show();
new Logs();
return true;
case R.id.statements:
Toast.makeText(getApplicationContext(), "Statements Selected", Toast.LENGTH_SHORT).show();
new Statements();
return true;
case R.id.timeline:
Toast.makeText(getApplicationContext(), "TImeline Selected", Toast.LENGTH_SHORT).show();
new Timeline();
return true;
case R.id.settings:
Toast.makeText(getApplicationContext(), "Settings Selected", Toast.LENGTH_SHORT).show();
new Settings();
return true;
case R.id.logout:
Toast.makeText(getApplicationContext(), "Logout Selected", Toast.LENGTH_SHORT).show();
return true;
default:
Toast.makeText(getApplicationContext(), "Somethings Wrong", Toast.LENGTH_SHORT).show();
return true;
}
}
});
// Initializing Drawer Layout and ActionBarToggle
drawerLayout = (DrawerLayout) findViewById(R.id.drawer);
ActionBarDrawerToggle actionBarDrawerToggle = new ActionBarDrawerToggle(this, drawerLayout, toolbar, R.string.openDrawer, R.string.closeDrawer) {
@Override
public void onDrawerClosed(View drawerView) {
// Code here will be triggered once the drawer closes as we dont want anything to happen so we leave this blank
super.onDrawerClosed(drawerView);
}
@Override
public void onDrawerOpened(View drawerView) {
// Code here will be triggered once the drawer open as we dont want anything to happen so we leave this blank
super.onDrawerOpened(drawerView);
}
};
//Setting the actionbarToggle to drawer layout
drawerLayout.setDrawerListener(actionBarDrawerToggle);
//calling sync state is necessay or else your hamburger icon wont show up
actionBarDrawerToggle.syncState();
// ATTENTION: This was auto-generated to implement the App Indexing API.
// See https://g.co/AppIndexing/AndroidStudio for more information.
client = new GoogleApiClient.Builder(this).addApi(AppIndex.API).build();
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_main, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
@Override
public void onStart() {
super.onStart();
// ATTENTION: This was auto-generated to implement the App Indexing API.
// See https://g.co/AppIndexing/AndroidStudio for more information.
client.connect();
Action viewAction = Action.newAction(
Action.TYPE_VIEW, // TODO: choose an action type.
"home Page", // TODO: Define a title for the content shown.
// TODO: If you have web page content that matches this app activity's content,
// make sure this auto-generated web page URL is correct.
// Otherwise, set the URL to null.
Uri.parse("http://host/path"),
// TODO: Make sure this auto-generated app URL is correct.
Uri.parse("android-app://www.arkounting.com.ng.finark/http/host/path")
);
AppIndex.AppIndexApi.start(client, viewAction);
}
@Override
public void onStop() {
super.onStop();
// ATTENTION: This was auto-generated to implement the App Indexing API.
// See https://g.co/AppIndexing/AndroidStudio for more information.
Action viewAction = Action.newAction(
Action.TYPE_VIEW, // TODO: choose an action type.
"home Page", // TODO: Define a title for the content shown.
// TODO: If you have web page content that matches this app activity's content,
// make sure this auto-generated web page URL is correct.
// Otherwise, set the URL to null.
Uri.parse("http://host/path"),
// TODO: Make sure this auto-generated app URL is correct.
Uri.parse("android-app://www.arkounting.com.ng.finark/http/host/path")
);
AppIndex.AppIndexApi.end(client, viewAction);
client.disconnect();
}
}
答案 0 :(得分：1)
我认为这是你的switch语句的样子：
switch (menuItem.getItemId()) {
//Replacing the main content with ContentFragment Which is our Inbox View;
Fragment fragment = null;
case R.id.dashboard:
Toast.makeText(getApplicationContext(), "Inbox Selected", Toast.LENGTH_SHORT).show();
fragment = new Dashboard();
break;
case R.id.profile:
Toast.makeText(getApplicationContext(), "Profile Selected", Toast.LENGTH_SHORT).show();
fragment = new Profile();
break;
case R.id.logs:
Toast.makeText(getApplicationContext(), "Logs Selected", Toast.LENGTH_SHORT).show();
fragment = new Logs();
return true;
case R.id.statements:
Toast.makeText(getApplicationContext(), "Statements Selected", Toast.LENGTH_SHORT).show();
fragment = new Statements();
break;
case R.id.timeline:
Toast.makeText(getApplicationContext(), "TImeline Selected", Toast.LENGTH_SHORT).show();
fragment = new Timeline();
break;
case R.id.settings:
Toast.makeText(getApplicationContext(), "Settings Selected", Toast.LENGTH_SHORT).show();
fragment = new Settings();
return true;
case R.id.logout:
Toast.makeText(getApplicationContext(), "Logout Selected", Toast.LENGTH_SHORT).show();
break;
default:
Toast.makeText(getApplicationContext(), "Somethings Wrong", Toast.LENGTH_SHORT).show();
break;
if (fragment != null) {
android.support.v4.app.FragmentTransaction fragmentTransaction = getSupportFragmentManager().beginTransaction();
fragmentTransaction.replace(R.id.frame, fragment);
fragmentTransaction.commit();
return true;
} else {
return true;
}
}