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我在這裏有一個代碼，用於設置導航抽屜。導航抽屜漢堡包圖標丟失
import android.support.v4.widget.DrawerLayout;
import android.support.v7.app.ActionBar;
import android.support.v7.app.ActionBarDrawerToggle;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import com.defcomm.invento.NavigationDrawerActivity;
import android.support.v7.widget.Toolbar;
import android.view.Menu;
import android.view.MenuItem;
public class INVENTO extends AppCompatActivity {
private Toolbar toolbar;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_invento);
toolbar= (Toolbar) findViewById(R.id.app_bar);
setSupportActionBar(toolbar);
getSupportActionBar().setDisplayShowHomeEnabled(true);
NavigationDrawerActivity drawerFragment= (NavigationDrawerActivity) getSupportFragmentManager().
findFragmentById(R.id.navigation_drawer);
drawerFragment.setUp(R.id.navigation_drawer, (DrawerLayout) findViewById(R.id.drawerlayout), toolbar);
}
@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_invento, 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);
}
}
導航活性起着：
import android.content.Context;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.support.v4.widget.DrawerLayout;
import android.support.v7.app.ActionBarDrawerToggle;
import android.support.v7.widget.Toolbar;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
/**
* A simple {@link Fragment} subclass.
*/
public class NavigationDrawerActivity extends Fragment {
private ActionBarDrawerToggle mdrawerToggle;
private DrawerLayout mdrawerLayout;
private boolean mUserLearnedState;
View containerId;
public static final String file_pref_name="Testpef";
public static final String KEY_USER_VALUE="user_learned_drawer";
private boolean mfromSavedInstanceState;
public NavigationDrawerActivity() {
// Required empty public constructor
}
@Override
public void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
mUserLearnedState=Boolean.valueOf(readPreference(getActivity(), KEY_USER_VALUE, "false"));
if (savedInstanceState!=null){
mfromSavedInstanceState=true;
}
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
return inflater.inflate(R.layout.fragment_navigation_drawer, container, false);
}
public void setUp(int fragmentId,DrawerLayout drawerlayout,Toolbar toolbar) {
mdrawerLayout=drawerlayout;
containerId=getActivity().findViewById(fragmentId);
mdrawerToggle= new ActionBarDrawerToggle(getActivity(),drawerlayout,
R.string.drawer_open,R.string.drawer_close){
@Override
public void onDrawerOpened(View drawerView) {
super.onDrawerOpened(drawerView);
if(!mUserLearnedState){
mUserLearnedState=true;
saveToPreference(getActivity(),KEY_USER_VALUE,mUserLearnedState+"");
}
getActivity().invalidateOptionsMenu();
}
@Override
public void onDrawerClosed(View drawerView) {
super.onDrawerClosed(drawerView);
mdrawerToggle.setDrawerIndicatorEnabled(true);
getActivity().invalidateOptionsMenu();
}
};
if(!mUserLearnedState&&!mfromSavedInstanceState){
mdrawerLayout.openDrawer(containerId);
}
mdrawerLayout.setDrawerListener(mdrawerToggle);
mdrawerLayout.post(new Runnable() {
@Override
public void run() {
mdrawerToggle.syncState();
mdrawerToggle.setDrawerIndicatorEnabled(true);
}
});
}
public static void saveToPreference (Context context,String preferenceName,String preferenceValue){
SharedPreferences shared= context.getSharedPreferences(file_pref_name, Context.MODE_PRIVATE);
SharedPreferences.Editor editor=shared.edit();
editor.putString(preferenceName,preferenceValue);
editor.apply();
}
public static String readPreference(Context context,String preferenceName,String defaultValue){
SharedPreferences share= context.getSharedPreferences(file_pref_name,Context.MODE_PRIVATE);
return share.getString(preferenceName,defaultValue);
}
}
除了這應該是有點擊並打開抽屜漢堡包圖標不appearing.MainActivity一切工作正常mainactivity.xml
<android.support.v4.widget.DrawerLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:id="@+id/drawerlayout"
android:layout_height="match_parent"
xmlns:app="http://schemas.android.com/apk/res-auto">
<RelativeLayout android:layout_width="match_parent"
android:layout_height="match_parent"
>
<include
layout="@layout/app_bar"
android:id="@+id/app_bar"/>
<TextView
android:layout_below="@+id/app_bar"
android:text="@string/hello_world"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
</RelativeLayout>
<fragment
android:id="@+id/navigation_drawer"
android:layout_width="@dimen/drawer_width"
android:layout_height="match_parent"
android:layout_gravity="start"
app:layout="@layout/fragment_navigation_drawer"
android:name="com.defcomm.invento.NavigationDrawerActivity"
tools:layout="@layout/fragment_navigation_drawer" />
我不知道這裏的故障在哪裏。我在這裏使用自定義工具欄進行了交叉檢查。但沒有任何工作，我不知道這個錯誤是否真的在這裏。請幫忙。
我的mainactivity.xml文件看起來像這樣： – Midhun