java - 如何在导航抽屉中添加活动
问题描述
我正在尝试在我的导航抽屉中添加一个活动。我已经在我的主要活动中加入了带有项目 id 的 switch case 的意图。我的应用程序运行完美,但意图没有工作,当我单击我添加意图抽屉关闭但我无法移动到活动的项目时,这是下面的代码。
我打算注册
public class MainActivity extends AppCompatActivity {
DrawerLayout drawerLayout;
NavigationView navigationView;
androidx.appcompat.widget.Toolbar toolbar;
TextView textView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
toolbar = findViewById(R.id.toolBar);
setSupportActionBar(toolbar);
textView = findViewById(R.id.heyTv);
drawerLayout = findViewById(R.id.drawer_layout);
ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(this, drawerLayout, toolbar,
R.string.navigation_drawer_open, R.string.navigation_drawer_close);
drawerLayout.addDrawerListener(toggle);
toggle.syncState();
navigationView = findViewById(R.id.navView);
navigationView.setNavigationItemSelectedListener(new NavigationView.OnNavigationItemSelectedListener() {
@Override
public boolean onNavigationItemSelected(@NonNull MenuItem item) {
switch (item.getItemId()){
case R.id.home:
Toast.makeText(MainActivity.this, "Trial", Toast.LENGTH_SHORT).show();
break;
case R.id.profile:
Toast.makeText(MainActivity.this, "User", Toast.LENGTH_SHORT).show();
break;
case R.id.logout:
new AlertDialog.Builder(MainActivity.this)
.setTitle("Logout")
.setIcon(R.drawable.ic_logout)
.setMessage("Sure! You want to logout")
.setPositiveButton("Yes", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
Intent intent = new Intent(MainActivity.this, SigninActivity.class);
startActivity(intent);
}
}).setNegativeButton("No", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
dialog.dismiss();
}
}).setNeutralButton("Help", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
Toast.makeText(MainActivity.this, "Press yes to logout", Toast.LENGTH_SHORT).show();
}
}).show();
break;
case R.id.signup:
Intent intent = new Intent(MainActivity.this, SignupActivity.class);
break;
case R.id.share:
Toast.makeText(MainActivity.this, "Share", Toast.LENGTH_SHORT).show();
case R.id.mail:
Toast.makeText(MainActivity.this, "Contact us", Toast.LENGTH_SHORT).show();
}
drawerLayout.closeDrawer(GravityCompat.START);
return true;
}
});
}
private void startActivities(Intent intent) {
startActivities(intent);
}
@Override
public void onBackPressed() {
if (drawerLayout.isDrawerOpen(GravityCompat.START)){
drawerLayout.closeDrawer(GravityCompat.START);
}
else {
new AlertDialog.Builder(MainActivity.this)
.setTitle("Exit")
.setIcon(R.drawable.ic_logout)
.setMessage("Sure! You want to exit?")
.setPositiveButton("Yes", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
finishAffinity();
}
}).setNegativeButton("No", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
dialog.dismiss();
}
}).setNeutralButton("Other", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
Toast.makeText(MainActivity.this, "Press yes to exit the app", Toast.LENGTH_SHORT).show();
}
}).show();
}
}
解决方案
您忘记开始活动了。创建意图后添加一行
Intent intent = new Intent(MainActivity.this, SignupActivity.class);
startActivity(intent);
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