android - 如何禁用 snackbar 的滑动关闭行为

Question

有没有办法阻止用户通过滑动来关闭 snackbar ？

我有一个在网络登录期间显示 snackbar 的应用程序，我想避免它被关闭。

根据 Nikola Despotoski 的建议，我已经尝试了两种解决方案:

private void startSnack(){

    loadingSnack = Snackbar.make(findViewById(R.id.email_login_form), getString(R.string.logging_in), Snackbar.LENGTH_INDEFINITE)
            .setAction("CANCEL", new OnClickListener() {
                @Override
                public void onClick(View view) {
                    getOps().cancelLogin();
                    enableControls();
                }
            });

    loadingSnack.getView().setOnTouchListener(new View.OnTouchListener() {
        public long mInitialTime;
        @Override
        public boolean onTouch(View v, MotionEvent event) {
            if (v instanceof Button) return false; //Action view was touched, proceed normally.
            else {
                switch (MotionEventCompat.getActionMasked(event)) {
                    case MotionEvent.ACTION_DOWN: {
                        Log.i(TAG, "ACTION_DOWN");
                        mInitialTime = System.currentTimeMillis();
                        break;
                    }
                    case MotionEvent.ACTION_UP: {
                        Log.i(TAG, "ACTION_UP");
                        long clickDuration = System.currentTimeMillis() - mInitialTime;
                        if (clickDuration <= ViewConfiguration.getTapTimeout()) {
                            return false;// click event, proceed normally
                        }
                    }
                    case MotionEvent.ACTION_MOVE: {
                        Log.i(TAG, "ACTION_MOVE");
                        return true;
                    }
                }
                return true;
            }
        }
    });

    ViewGroup.LayoutParams lp = loadingSnack.getView().getLayoutParams();
    if (lp != null && lp instanceof CoordinatorLayout.LayoutParams) {
        ((CoordinatorLayout.LayoutParams)lp).setBehavior(new DummyBehavior());
        loadingSnack.getView().setLayoutParams(lp);
        Log.i(TAG, "Dummy behavior assigned to " + lp.toString());

    }

    loadingSnack.show();

}

这是 DummyBehavior 类:

public class DummyBehavior extends CoordinatorLayout.Behavior<View>{

    /**
     * Debugging tag used by the Android logger.
     */
    protected final static String TAG =
            DummyBehavior.class.getSimpleName();



    public DummyBehavior() {
        Log.i(TAG, "Dummy behavior created");
        StackTraceElement[] stackTrace = Thread.currentThread().getStackTrace();
        Log.i(TAG, "Method " + stackTrace[2].getMethodName() );

    }

    public DummyBehavior(Context context, AttributeSet attrs) {
        super(context, attrs);
        Log.i(TAG, "Dummy behavior created");

    }

    @Override
    public boolean onInterceptTouchEvent(CoordinatorLayout parent, View child, MotionEvent ev) {
        Log.i(TAG, "Method " + Thread.currentThread().getStackTrace()[2].getMethodName() );
        return false;
    }

    @Override
    public boolean onTouchEvent(CoordinatorLayout parent, View child, MotionEvent ev) {
        Log.i(TAG, "Method " + Thread.currentThread().getStackTrace()[2].getMethodName() );
        return false;
    }

    @Override
    public boolean blocksInteractionBelow(CoordinatorLayout parent, View child) {
        Log.i(TAG, "Method " + Thread.currentThread().getStackTrace()[2].getMethodName() );
        return false;
    }

    @Override
    public boolean layoutDependsOn(CoordinatorLayout parent, View child, View dependency) {
        Log.i(TAG, "Method " + Thread.currentThread().getStackTrace()[2].getMethodName() );
        return false;
    }

    @Override
    public boolean onDependentViewChanged(CoordinatorLayout parent, View child, View dependency) {
        Log.i(TAG, "Method " + Thread.currentThread().getStackTrace()[2].getMethodName() );
        return false;
    }

    @Override
    public void onDependentViewRemoved(CoordinatorLayout parent, View child, View dependency) {
        Log.i(TAG, "Method " + Thread.currentThread().getStackTrace()[2].getMethodName() );
    }

    @Override
    public boolean isDirty(CoordinatorLayout parent, View child) {
        Log.i(TAG, "Method " + Thread.currentThread().getStackTrace()[2].getMethodName() );
        return false;
    }

    @Override
    public boolean onMeasureChild(CoordinatorLayout parent, View child, int parentWidthMeasureSpec, int widthUsed, int parentHeightMeasureSpec, int heightUsed) {
        Log.i(TAG, "Method " + Thread.currentThread().getStackTrace()[2].getMethodName() );
        return false;
    }

    @Override
    public boolean onLayoutChild(CoordinatorLayout parent, View child, int layoutDirection) {
        Log.i(TAG, "Method " + Thread.currentThread().getStackTrace()[2].getMethodName() );
        return false;
    }

    @Override
    public boolean onStartNestedScroll(CoordinatorLayout coordinatorLayout, View child, View directTargetChild, View target, int nestedScrollAxes) {
        Log.i(TAG, "Method " + Thread.currentThread().getStackTrace()[2].getMethodName() );
        return false;
    }

    @Override
    public void onNestedScrollAccepted(CoordinatorLayout coordinatorLayout, View child, View directTargetChild, View target, int nestedScrollAxes) {
        Log.i(TAG, "Method " + Thread.currentThread().getStackTrace()[2].getMethodName() );
    }

    @Override
    public void onStopNestedScroll(CoordinatorLayout coordinatorLayout, View child, View target) {
        Log.i(TAG, "Method " + Thread.currentThread().getStackTrace()[2].getMethodName() );
    }

    @Override
    public void onNestedScroll(CoordinatorLayout coordinatorLayout, View child, View target, int dxConsumed, int dyConsumed, int dxUnconsumed, int dyUnconsumed) {
        Log.i(TAG, "Method " + Thread.currentThread().getStackTrace()[2].getMethodName() );
    }

    @Override
    public void onNestedPreScroll(CoordinatorLayout coordinatorLayout, View child, View target, int dx, int dy, int[] consumed) {
        Log.i(TAG, "Method " + Thread.currentThread().getStackTrace()[2].getMethodName() );
    }

    @Override
    public boolean onNestedFling(CoordinatorLayout coordinatorLayout, View child, View target, float velocityX, float velocityY, boolean consumed) {
        Log.i(TAG, "Method " + Thread.currentThread().getStackTrace()[2].getMethodName() );
        return false;
    }

    @Override
    public boolean onNestedPreFling(CoordinatorLayout coordinatorLayout, View child, View target, float velocityX, float velocityY) {
        Log.i(TAG, "Method " + Thread.currentThread().getStackTrace()[2].getMethodName() );
        return false;
    }

    @Override
    public WindowInsetsCompat onApplyWindowInsets(CoordinatorLayout coordinatorLayout, View child, WindowInsetsCompat insets) {
        Log.i(TAG, "Method " + Thread.currentThread().getStackTrace()[2].getMethodName() );
        return null;
    }

    @Override
    public void onRestoreInstanceState(CoordinatorLayout parent, View child, Parcelable state) {
        Log.i(TAG, "Method " + Thread.currentThread().getStackTrace()[2].getMethodName() );
    }

    @Override
    public Parcelable onSaveInstanceState(CoordinatorLayout parent, View child) {
        Log.i(TAG, "Method " + Thread.currentThread().getStackTrace()[2].getMethodName() );
        return null;
    }
}

但是滑动时我的 snackbar 仍然消失，这是一个典型的日志:

12-02 22:26:43.864 19598-19598/ I/DummyBehavior: Dummy behavior created
12-02 22:26:43.866 19598-19598/ I/DummyBehavior: Method <init>
12-02 22:26:43.866 19598-19598/ I/LifecycleLoggingActivity: Dummy behavior assigned to android.support.design.widget.CoordinatorLayout$LayoutParams@808c0e9
12-02 22:26:44.755 19598-19598/ I/LifecycleLoggingActivity: ACTION_DOWN
12-02 22:26:44.798 19598-19598/ I/LifecycleLoggingActivity: ACTION_MOVE
12-02 22:26:44.815 19598-19598/ I/LifecycleLoggingActivity: ACTION_MOVE
12-02 22:26:44.832 19598-19598/ I/LifecycleLoggingActivity: ACTION_MOVE
12-02 22:26:44.849 19598-19598/ I/LifecycleLoggingActivity: ACTION_MOVE
12-02 22:26:44.866 19598-19598/ I/LifecycleLoggingActivity: ACTION_MOVE
12-02 22:26:44.883 19598-19598/ I/LifecycleLoggingActivity: ACTION_MOVE

Answer 1

这对我有用:

    Snackbar.SnackbarLayout layout = (Snackbar.SnackbarLayout) snackbar.getView();
    snackbar.setDuration(Snackbar.LENGTH_INDEFINITE);
    snackbar.show();
    layout.getViewTreeObserver().addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
        @Override
        public void onGlobalLayout() {
            ViewGroup.LayoutParams lp = layout.getLayoutParams();
            if (lp instanceof CoordinatorLayout.LayoutParams) {
                ((CoordinatorLayout.LayoutParams) lp).setBehavior(new DisableSwipeBehavior());
                layout.setLayoutParams(lp);
            }
            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN) {
                layout.getViewTreeObserver().removeOnGlobalLayoutListener(this);
            } else {
                //noinspection deprecation
                layout.getViewTreeObserver().removeGlobalOnLayoutListener(this);
            }
        }
    });

DisableSwipeBehavior 在哪里:

public class DisableSwipeBehavior extends SwipeDismissBehavior<Snackbar.SnackbarLayout> {
    @Override
    public boolean canSwipeDismissView(@NonNull View view) {
        return false;
    }
}