我使用这个答案创建了一个NavigationDrawer类:Same Navigation Drawer in different Activities
我的问题是当我点击当前活动的导航抽屉项时,活动会重新加载,如果点击的项目与当前活动相同,我只需要它关闭navigationDrawer。
This is my Drawer Activity
import android.content.Intent;
import android.support.design.widget.NavigationView;
import android.support.v4.view.GravityCompat;
import android.support.v4.widget.DrawerLayout;
import android.support.v7.app.ActionBarDrawerToggle;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.MenuItem;
import com.rafael.test.LoginActivity;
import com.rafael.test.HomeActivity;
import com.rafael.test.R;
import com.rafael.test.TokenActivity;
public class DrawerBase extends AppCompatActivity
implements NavigationView.OnNavigationItemSelectedListener {
public DrawerLayout drawer;
public NavigationView navigationView;
protected void onCreateDrawer() {
drawer = (DrawerLayout)findViewById(R.id.drawer_layout);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(
this, drawer, toolbar, R.string.navigation_drawer_open, R.string.navigation_drawer_close);
drawer.setDrawerListener(toggle);
toggle.syncState();
// Creates the NavigationView and set Listener
navigationView = (NavigationView) findViewById(R.id.nav_view);
navigationView.setNavigationItemSelectedListener(this);
}
@Override
public void onBackPressed() {
if (drawer.isDrawerOpen(GravityCompat.START)) {
drawer.closeDrawer(GravityCompat.START);
} else {
super.onBackPressed();
}
}
// Here is where I'm handling the menu item click
@Override
public boolean onNavigationItemSelected(MenuItem item) {
int id = item.getItemId();
if (id == R.id.home) {
Intent i = new Intent(this, HomeActivity.class);
startActivity(i);
} else if (id == R.id.feed) {
Intent i = new Intent(this,FeedActivity.class);
startActivity(i);
} else if (id == R.id.token) {
Intent i = new Intent(this, TokenActivity.class);
startActivity(i);
}
drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
drawer.closeDrawer(GravityCompat.START);
return true;
}
}
答案 0 :(得分:0)
有几种方法可以做到这一点。
您可以创建一个条件来简单地检查当前活动,该活动可以存储在BaseActivity中的静态变量中。
或者,如果您不想重新创建位于顶部的活动,您可以将singleTop launchMode添加到清单中,如下所示:
<activity
android:name=".YourActivity"
android:launchMode="singleTop"
</activity>
另一个类似的替代方案是,如果您不想从导航抽屉重新创建活动,但想要在其他地方重新创建活动,则将singleTop标志添加到导航器意图中...
intent.setFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP);
答案 1 :(得分:0)
得到答案,但出于某种原因,发布它的人将其删除。
在我的OnNavigationItemSelecte()
方法中,我更改了测试以调用Intent
来自:
int id = item.getItemId();
if (id == R.id.home) {
Intent i = new Intent(this, HomeActivity.class);
startActivity(i);
到这个
if (id == R.id.home) {
// This code gets the class name to use in the test
if(this.getClass().getSimpleName().equals("HomeActivity")){
drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
}else{
Intent i = new Intent(this, HomeActivity.class);
startActivity(i);
}