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Closing the navigation box after opening another action

So, I implemented a navigation box, and it works great. I have an action bar item that uses use for the next action. When entering the second action, by clicking the action bar icon, if the navigation box is open, it remains open even after the user returns to the first action. I tried to use

drawerLayout.closeDrawer(drawerListView);

after the intention is called, but the following happens, the second action will begin after the animation is completed to close the first activity. This creates a bad user interface and even I don't like it.

So, could I close the drawer after creating the second action? I mean from the second activtiy onCreate or somewhere?

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4 answers

After searching the source for DrawerLayout.java for too long, I found a way. Run this when the user returns to the first action to close the drawer without starting the animation:

View view = drawerLayout.getChildAt(drawerLayout.getChildCount() - 1);
 ViewTreeObserver vto = view.getViewTreeObserver();

 vto.addOnPreDrawListener(new ViewTreeObserver.OnPreDrawListener() {
                @Override
                public boolean onPreDraw() {
                    final DrawerLayout.LayoutParams lp = new DrawerLayout.LayoutParams(view.getWidth(), view.getHeight());
                    lp.gravity = Gravity.LEFT;
                    view.setLayoutParams(lp);
                    view.setLeft(-view.getMeasuredWidth());
                    view.getViewTreeObserver().removeOnPreDrawListener(this);
                    return true;
                }
            });

Explanation

First find the view that matches the navigation view, this will be the last child of drawerLayout. Set the left position to minus its width (for the left drawer).

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+5

DrawerLayout.closeDrawer(int/View, bool) v24 , :

drawerLayout.closeDrawer(Gravity.LEFT, false);

onResume, , , , .

+4

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, onCreate(), , .

startActivity() closeDrawer(). - , , , , , .

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closeDrawer() onCreate() , - , onResume(). closeDrawer() onResume() , . DrawerLayout , .

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, android.support.v4.widget, (-) DrawerLayout , . . ( .) moveDrawerToOffset() LayoutParams, , .

, :

// move drawer directly to the closed position
moveDrawerToOffset(drawerView, 0.f); 

/* EDIT: as of v23.2.1 this direct approach no longer works
         because the LayoutParam fields have been made private...
// set internal state so DrawerLayout knows it closed
final LayoutParams lp = (LayoutParams) drawerView.getLayoutParams();
lp.onScreen = 0.f;
lp.knownOpen = false;

invalidate();
/*/
// ...however, calling closeDrawer will set those LayoutParams
//    and invalidate the view.
closeDrawer(drawerView);
/**/

:, moveDrawerToOffset() LayoutParams, .

1 ( DrawerLayout)

support.v4, , DrawerLayout.

/src/android/support/v 4/widget/:

package android.support.v4.widget;

import android.support.annotation.IntDef;
import android.support.v4.view.GravityCompat;
import android.view.Gravity;
import android.view.View;

import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;

public class Support4Widget {

    /** @hide */
    @IntDef({Gravity.LEFT, Gravity.RIGHT, GravityCompat.START, GravityCompat.END})
    @Retention(RetentionPolicy.SOURCE)
    private @interface EdgeGravity {}

    public static void setDrawerClosed(DrawerLayout drawerLayout, @EdgeGravity int gravity) {
        final View drawerView = drawerLayout.findDrawerWithGravity(gravity);
        if (drawerView == null) {
            throw new IllegalArgumentException("No drawer view found with gravity " +
                    DrawerLayout.gravityToString(gravity));
        }

        // move drawer directly to the closed position
        drawerLayout.moveDrawerToOffset(drawerView, 0.f); 

        /* EDIT: as of v23.2.1 this no longer works because the
                 LayoutParam fields have been made private, but
                 calling closeDrawer will achieve the same result.

        // set internal state so DrawerLayout knows it closed
        final DrawerLayout.LayoutParams lp = (DrawerLayout.LayoutParams) drawerView.getLayoutParams();
        lp.onScreen = 0.f;
        lp.knownOpen = false;

        drawerLayout.invalidate();
        /*/
        // Calling closeDrawer updates the internal state so DrawerLayout knows it closed
        // and invalidates the view for us.
        drawerLayout.closeDrawer(drawerView);
        /**/
    }
}

, , , :

public static final String CLOSE_NAV_DRAWER = "CLOSE_NAV_DRAWER";
private boolean mCloseNavDrawer;

@Override
public void onCreate(Bundle savedInstanceState) {
    // ...
    if (savedInstanceState != null) {
        mCloseNavDrawer = savedInstanceState.getBoolean(CLOSE_NAV_DRAWER);
    }
}

@Override
public boolean onNavigationItemSelected(MenuItem menuItem) {

    // ...

    startActivity(intent);
    mCloseNavDrawer = true;
}

@Override
public void onSaveInstanceState(Bundle savedInstanceState) {
    savedInstanceState.putBoolean(CLOSE_NAV_DRAWER, mCloseNavDrawer);
    super.onSaveInstanceState(savedInstanceState);
}

... setDrawerClosed(), onResume() :

@Overrid6e
protected void onResume() {
    super.onResume();

    if(mCloseNavDrawer && mDrawerLayout != null && mDrawerLayout.isDrawerOpen(GravityCompat.START)) {
        Support4Widget.setDrawerClosed(mDrawerLayout, GravityCompat.START);
        mCloseNavDrawer = false;
    }
}

2 ( DrawerLayout)

DrawerLayout, setDrawerClosed().

/src/android/support/v 4/widget/:

package android.support.v4.widget;

import android.content.Context;
import android.support.annotation.IntDef;
import android.support.v4.view.GravityCompat;
import android.util.AttributeSet;
import android.view.Gravity;
import android.view.View;

import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;

public class CustomDrawerLayout extends DrawerLayout {

    /** @hide */
    @IntDef({Gravity.LEFT, Gravity.RIGHT, GravityCompat.START, GravityCompat.END})
    @Retention(RetentionPolicy.SOURCE)
    private @interface EdgeGravity {}

    public CustomDrawerLayout(Context context) {
        super(context);
    }

    public CustomDrawerLayout(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    public CustomDrawerLayout(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
    }

    public void setDrawerClosed(View drawerView) {
        if (!isDrawerView(drawerView)) {
            throw new IllegalArgumentException("View " + drawerView + " is not a sliding drawer");
        }

        // move drawer directly to the closed position
        moveDrawerToOffset(drawerView, 0.f); 

        /* EDIT: as of v23.2.1 this no longer works because the
                 LayoutParam fields have been made private, but
                 calling closeDrawer will achieve the same result.

        // set internal state so DrawerLayout knows it closed
        final LayoutParams lp = (LayoutParams) drawerView.getLayoutParams();
        lp.onScreen = 0.f;
        lp.knownOpen = false;

        invalidate();
        /*/
        // Calling closeDrawer updates the internal state so DrawerLayout knows it closed
        // and invalidates the view for us.
        closeDrawer(drawerView);
        /**/
    }

    public void setDrawerClosed(@EdgeGravity int gravity) {
        final View drawerView = findDrawerWithGravity(gravity);
        if (drawerView == null) {
            throw new IllegalArgumentException("No drawer view found with gravity " +
                    gravityToString(gravity));
        }

        // move drawer directly to the closed position
        moveDrawerToOffset(drawerView, 0.f); 

        /* EDIT: as of v23.2.1 this no longer works because the
                 LayoutParam fields have been made private, but
                 calling closeDrawer will achieve the same result.

        // set internal state so DrawerLayout knows it closed
        final LayoutParams lp = (LayoutParams) drawerView.getLayoutParams();
        lp.onScreen = 0.f;
        lp.knownOpen = false;

        invalidate();
        /*/
        // Calling closeDrawer updates the internal state so DrawerLayout knows it closed
        // and invalidates the view for us.
        closeDrawer(drawerView);
        /**/
    }
}

CustomDrawerLayout DrawerLayout :

<android.support.v4.widget.CustomDrawerLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:id="@+id/drawer_layout"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:fitsSystemWindows="true"
    >

... , , , :

public static final String CLOSE_NAV_DRAWER = "CLOSE_NAV_DRAWER";
private boolean mCloseNavDrawer;

@Override
public void onCreate(Bundle savedInstanceState) {
    // ...
    if (savedInstanceState != null) {
        mCloseNavDrawer = savedInstanceState.getBoolean(CLOSE_NAV_DRAWER);
    }
}

@Override
public boolean onNavigationItemSelected(MenuItem menuItem) {

    // ...

    startActivity(intent);
    mCloseNavDrawer = true;
}

@Override
public void onSaveInstanceState(Bundle savedInstanceState) {
    savedInstanceState.putBoolean(CLOSE_NAV_DRAWER, mCloseNavDrawer);
    super.onSaveInstanceState(savedInstanceState);
}

... setDrawerClosed(), onResume() :

@Overrid6e
protected void onResume() {
    super.onResume();

    if(mCloseNavDrawer && mDrawerLayout != null && mDrawerLayout.isDrawerOpen(GravityCompat.START)) {
        mDrawerLayout.setDrawerClosed(GravityCompat.START);
        mCloseNavDrawer = false;
    }
}
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