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android api25 点击隐藏BottomSheet需求的

android api25 点击隐藏BottomSheet需求的

作者: HaRun | 来源:发表于2017-04-02 00:25 被阅读0次

    <pre>
    public class BottomSheetBehaviorActivity extends AppCompatActivity {

    private BottomSheetBehavior mBottomSheetBehavior;
    
    private BottomSheetDialog mBottomSheetDialog;
    
    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.bsbehavior_activity);
        Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
        setSupportActionBar(toolbar);
        getSupportActionBar().setDisplayHomeAsUpEnabled(true);
    
        findViewById(R.id.btn_bottom_sheet_control).setOnClickListener(onClickListener);
        findViewById(R.id.btn_bottom_dialog_control).setOnClickListener(onClickListener);
    
        mBottomSheetBehavior = BottomSheetBehavior.from(findViewById(R.id.tab_layout));
    
        createBottomSheetDialog();
    }
    
    private void createBottomSheetDialog() {
        mBottomSheetDialog = new BottomSheetDialog(this);
        View view = LayoutInflater.from(this).inflate(R.layout.dialog_bottom_sheet, null, false);
        mBottomSheetDialog.setContentView(view);
    
        RecyclerView recyclerView = (RecyclerView) view.findViewById(R.id.recyclerView);
        recyclerView.setHasFixedSize(true);
        List<String> list = new ArrayList<>();
        for (int i = 0; i < 20; i++) {
            list.add("我是第" + i + "个");
        }
        LinearLayoutManager linearLayoutManager = new LinearLayoutManager(this);
        linearLayoutManager.setSmoothScrollbarEnabled(true);
        recyclerView.setLayoutManager(linearLayoutManager);
        ListRecyclerAdapter adapter = new ListRecyclerAdapter(list);
        recyclerView.setAdapter(adapter);
    
        setBehaviorCallback();
    }
    
    private void setBehaviorCallback() {
        View view = mBottomSheetDialog.getDelegate().findViewById(android.support.design.R.id.design_bottom_sheet);
        final BottomSheetBehavior bottomSheetBehavior = BottomSheetBehavior.from(view);
        bottomSheetBehavior.setBottomSheetCallback(new BottomSheetBehavior.BottomSheetCallback() {
            @Override
            public void onStateChanged(@NonNull View bottomSheet, int newState) {
                if (newState == BottomSheetBehavior.STATE_HIDDEN) {
                    mBottomSheetDialog.dismiss();
                    bottomSheetBehavior.setState(BottomSheetBehavior.STATE_COLLAPSED);
                }
            }
    
            @Override
            public void onSlide(@NonNull View bottomSheet, float slideOffset) {
            }
        });
    }
    
    private View.OnClickListener onClickListener = new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            if (v.getId() == R.id.btn_bottom_sheet_control) {
    
                System.out.println("sss:" + mBottomSheetBehavior.getState());
    
                //api25 时这样写!!一开始的状态默认为STATE_COLLAPSED,然后经过设置为STATE_HIDDEN,然后再经过设置为STATE_EXPANDED,然后再次回到STATE_EXPANDED上,所以可以写或运算
                if (mBottomSheetBehavior.getState() == BottomSheetBehavior.STATE_EXPANDED || mBottomSheetBehavior.getState() == BottomSheetBehavior.STATE_COLLAPSED) {
    
                    mBottomSheetBehavior.setHideable(true);
                    mBottomSheetBehavior.setState(BottomSheetBehavior.STATE_HIDDEN);
    
                } else if (mBottomSheetBehavior.getState() == BottomSheetBehavior.STATE_HIDDEN) {
                    mBottomSheetBehavior.setState(BottomSheetBehavior.STATE_EXPANDED);
                }
    
    
            } else if (v.getId() == R.id.btn_bottom_dialog_control) {
                if (mBottomSheetDialog.isShowing()) {
                    mBottomSheetDialog.dismiss();
                } else {
                    mBottomSheetDialog.show();
                }
            }
        }
    };
    
    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        if (item.getItemId() == android.R.id.home) {
            finish();
        }
        return true;
    }
    

    }
    </pre>

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