如何在 Modal BottomSheet 对话框中添加底部布局？

Question

我想使用BottomSheetDialogFragment. 但问题是底部布局在我拖动时滚动。我希望底部布局始终在底部，直到BottomSheetDialogFragment被解雇。

请找到截图

这是我的代码

bottomsheet_layout.xml

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/activity_main"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent">
        <!--The main content goes over here-->
    </LinearLayout>

    <!--The footer view-->
    <LinearLayout
        android:id="@+id/footer_purchase_layout"
        android:layout_width="match_parent"
        android:layout_height="52dp"
        android:layout_gravity="bottom"
        android:orientation="horizontal"
        android:weightSum="1">

        <TextView
            android:id="@+id/txt_cancel_purchase"
            android:layout_width="0dp"
            android:layout_height="match_parent"
            android:layout_weight="0.5"
            android:gravity="left|center_vertical"
            android:text="CLOSE"
            android:textSize="14sp" />

        <TextView
            android:id="@+id/txt_item_purchase_action"
            android:layout_width="0dp"
            android:layout_height="match_parent"
            android:layout_weight="0.5"
            android:gravity="right|center_vertical"
            android:text="ADD STICKERS"
            android:textSize="14sp" />

    </LinearLayout>
</FrameLayout>

ModalBottomSheetFragment.java

public class ModalBottomSheetFragment extends BottomSheetDialogFragment {

    public ModalBottomSheetFragment() {}

    private BottomSheetBehavior.BottomSheetCallback mBottomSheetBehaviorCallback = new BottomSheetBehavior.BottomSheetCallback() {

        @Override
        public void onStateChanged(@NonNull View bottomSheet, int newState) {
            if (newState == BottomSheetBehavior.STATE_HIDDEN) {
                dismiss();
            }
        }

        @Override
        public void onSlide(@NonNull View bottomSheet, float slideOffset) {}
    };

    @TargetApi(Build.VERSION_CODES.LOLLIPOP_MR1)
    @Override
    public void setupDialog(Dialog dialog, int style) {
        super.setupDialog(dialog, style);

        View mContentView = View.inflate(getContext(), R.layout.bottomsheet_layout, null);
        dialog.setContentView(mContentView);
        CoordinatorLayout.LayoutParams layoutParams =
                (CoordinatorLayout.LayoutParams) ((View) mContentView.getParent()).getLayoutParams();
        CoordinatorLayout.Behavior mBehavior = layoutParams.getBehavior();
        if (mBehavior != null && mBehavior instanceof BottomSheetBehavior) {
            ((BottomSheetBehavior) mBehavior).setBottomSheetCallback(mBottomSheetBehaviorCallback);
            int height = getScreenHeight(getActivity());
            final double desiredHeight = 0.85 * height;
            mContentView.getLayoutParams().height = height;
            ((BottomSheetBehavior) mBehavior).setPeekHeight((int) desiredHeight);

        }
    }

    public static int getScreenHeight(Context ctx) {
        DisplayMetrics metrics = ctx.getResources().getDisplayMetrics();
        return metrics.heightPixels;
    }
}

主活动.java

public class MainActivity extends AppCompatActivity {

    private Button mShowBottomSheetDialog;
    private BottomSheetDialogFragment bottomSheetDialogFragment;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        mShowBottomSheetDialog = (Button) findViewById(R.id.showBottomSheet);
        mShowBottomSheetDialog.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                bottomSheetDialogFragment = new ModalBottomSheetFragment();
                bottomSheetDialogFragment.show(getSupportFragmentManager(), bottomSheetDialogFragment.getTag());
            }
        });
    }
}

Answer 1

使用此布局而不是您的布局......

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/activity_main"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical">

        <ScrollView
        android:layout_width="match_parent"
        android:layout_height="match_parent">


    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="10"
        android:orientation="vertical">
        <!--The main content goes over here-->
    </LinearLayout>

     </ScrollView>

    <!--The footer view-->
    <LinearLayout
        android:id="@+id/footer_purchase_layout"
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="1"
        android:orientation="horizontal"
        android:weightSum="1">

        <TextView
            android:id="@+id/txt_cancel_purchase"
            android:layout_width="0dp"
            android:layout_height="match_parent"
            android:layout_weight="0.5"
            android:gravity="left|center_vertical"
            android:text="CLOSE"
            android:textSize="14sp" />

        <TextView
            android:id="@+id/txt_item_purchase_action"
            android:layout_width="0dp"
            android:layout_height="match_parent"
            android:layout_weight="0.5"
            android:gravity="right|center_vertical"
            android:text="ADD STICKERS"
            android:textSize="14sp" />

    </LinearLayout>
    </LinearLayout>
</FrameLayout>

注意：- 权重将您的布局划分为不同的视图，这在您的布局中是恒定的......