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ナビゲーション ドロワーに関するフラグメントとアクティビティのバック プレス機能を実装しようとしていますが、機能していません。私が間違っていること/欠けていること、これを修正するために何をする必要があるかを誰かが知っていますか?

活動クラス

public class BakerlooHDNActivity extends AppCompatActivity {

    //save our header or result
    private Drawer result = null;

    // Declaring Views and Variables
    ViewPager pager;
    BakerlooHDNViewPagerAdapter adapter;
    BakerlooHDNSlidingTabLayout bakerloohdntabs;
    int Numboftabs = 2;

    private int getFactorColor(int color, float factor) {
        float[] hsv = new float[3];
        Color.colorToHSV(color, hsv);
        hsv[2] *= factor;
        color = Color.HSVToColor(hsv);
        return color;
    }

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_bakerloo_hdn);


        final String actionBarColor = "#B36305";

        Toolbar mToolbar = (Toolbar) findViewById(R.id.toolbar);
        setSupportActionBar(mToolbar);

        if(getSupportActionBar()!=null) {
            getSupportActionBar().setDisplayHomeAsUpEnabled(true);
            getSupportActionBar().setDisplayShowHomeEnabled(false);
            getSupportActionBar().setTitle(Html.fromHtml("<font color='#FFFFFF'>" + getResources().getString(R.string.hdn) + "</font>"));
            getSupportActionBar().setSubtitle(Html.fromHtml("<font color='#FFFFFF'>" + getResources().getString(R.string.zone_3) + "</font>"));

            final Drawable upArrow = ContextCompat.getDrawable(this, R.drawable.abc_ic_ab_back_mtrl_am_alpha);
            upArrow.setColorFilter(getResources().getColor(R.color.white), PorterDuff.Mode.SRC_ATOP);
            getSupportActionBar().setHomeAsUpIndicator(upArrow);
        }

        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
            Window window = getWindow();
            window.addFlags(WindowManager.LayoutParams.FLAG_DRAWS_SYSTEM_BAR_BACKGROUNDS);
            getWindow().setStatusBarColor(getFactorColor(Color.parseColor(actionBarColor), 0.8f));
        }

        // start of navigation drawer
        headerResult = new AccountHeaderBuilder()
                .withActivity(getActivity())
                .withCompactStyle(true)
                .withHeaderBackground(R.color.bakerloo)
                .withProfileImagesVisible(false)
                .withTextColor(Color.parseColor("#FFFFFF"))
                .withSelectionListEnabled(false)

                .addProfiles(
                        new ProfileDrawerItem().withName(getString(R.string.hdn)).withEmail(getString(R.string.hello_world))
                )
                .build();

        result = new DrawerBuilder()
                .withActivity(getActivity())
                .withAccountHeader(headerResult)
                .withTranslucentStatusBar(false)
                .withActionBarDrawerToggle(false)
                .withSelectedItem(-1)
                .addDrawerItems(
                        new PrimaryDrawerItem().withName(R.string.hello_world).withIdentifier(1).withCheckable(false)
                )
                .build();
        // end of navigation drawer
    }


    @Override
    public void onBackPressed() {
        if (result.isDrawerOpen()) {
            result.closeDrawer();
        } else {
            super.onBackPressed();
        }
        LocalBroadcastManager.getInstance(getApplicationContext()).sendBroadcast(new Intent("BACKPRESSED_TAG"));
    }
}

フラグメントクラス

public class FragmentBakerlooHDN extends android.support.v4.app.Fragment {

    public FragmentBakerlooHDN() {
        // Required empty constructor
    }

    BroadcastReceiver onNotice = new BroadcastReceiver() {
        @Override
        public void onReceive(Context context, Intent intent) {
            // do stuff when back in activity is pressed
             result.closeDrawer();
        }
    };

    // Declaring navigation drawer
    private AccountHeader headerResult = null;
    private Drawer result = null;

    /**
     * Whether or not the activity is in two-pane mode, i.e. running on a tablet
     * device.
     */
    private boolean mTwoPane;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        LocalBroadcastManager.getInstance(getActivity()).registerReceiver(onNotice, new IntentFilter("BACKPRESSED_TAG"));

        super.onCreate(savedInstanceState);
    }

    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        View v = inflater.inflate(R.layout.fragment_bakerloo_hdn, container, false);

        // start of navigation drawer
        headerResult = new AccountHeaderBuilder()
                .withActivity(getActivity())
                .withCompactStyle(true)
                .withHeaderBackground(R.color.bakerloo)
                .withProfileImagesVisible(false)
                .withTextColor(Color.parseColor("#FFFFFF"))
                .withSelectionListEnabled(false)

                .addProfiles(
                        new ProfileDrawerItem().withName(getString(R.string.hdn)).withEmail(getString(R.string.hello_world))
                )
                .build();

        result = new DrawerBuilder()
                .withActivity(getActivity())
                .withAccountHeader(headerResult)
                .withTranslucentStatusBar(false)
                .withActionBarDrawerToggle(false)
                .withSelectedItem(-1)
                .addDrawerItems(
                        new PrimaryDrawerItem().withName(R.string.hello_world).withIdentifier(1).withCheckable(false)
                )
                .build();
        // end of navigation drawer


        super.onCreate(savedInstanceState);
        return v;
    }

    @Override
    public void onActivityCreated(Bundle savedInstanceState) {
        View v = getView();

        super.onActivityCreated(savedInstanceState);
    }
}
4

3 に答える 3

2

これを試して：

    private DrawerLayout mDrawerLayout;
    private ListView mDrawerList;

    @Override
    public void onCreate() {
        mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);
        mDrawerList = (ListView) findViewById(R.id.navdrawer);
    }

    @Override
    public void onBackPressed() {
        if(mDrawerLayout.isDrawerOpen(mDrawerList)) mDrawerLayout.closeDrawer(mDrawerList);
        else super.onBackPressed();
    }

編集：

アクティビティで戻るが押されたときに LocalBroadcastManager を使用してフラグメントを更新できます。

フラグメントに新しい BroadcastReceiver() インスタンスを追加します。

 BroadcastReceiver onNotice = new BroadcastReceiver() {
    @Override
    public void onReceive(Context context, Intent intent) {
        // do stuff when back in activity is pressed
        // headerResult.closeDrawer();
    }
};

onCreate メソッドのタグで登録します。

LocalBroadcastManager.getInstance(this).registerReceiver(onNotice,
            new IntentFilter("BACKPRESSED_TAG"));

次に、Activity OnBackPressed メソッド呼び出しブロードキャストで:

LocalBroadcastManager.getInstance(context).sendBroadcast(new Intent("BACKPRESSED_TAG"));
于 2015-08-04T21:33:46.160 に答える