diff options
| -rw-r--r-- | core/java/android/widget/AbsSeekBar.java | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/core/java/android/widget/AbsSeekBar.java b/core/java/android/widget/AbsSeekBar.java index ae68794..e217e4f 100644 --- a/core/java/android/widget/AbsSeekBar.java +++ b/core/java/android/widget/AbsSeekBar.java @@ -21,6 +21,7 @@ import android.content.res.TypedArray; import android.graphics.Canvas; import android.graphics.Rect; import android.graphics.drawable.Drawable; +import android.os.Bundle; import android.util.AttributeSet; import android.view.KeyEvent; import android.view.MotionEvent; @@ -486,5 +487,46 @@ public abstract class AbsSeekBar extends ProgressBar { public void onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo info) { super.onInitializeAccessibilityNodeInfo(info); info.setClassName(AbsSeekBar.class.getName()); + + if (isEnabled()) { + final int progress = getProgress(); + if (progress > 0) { + info.addAction(AccessibilityNodeInfo.ACTION_SCROLL_BACKWARD); + } + if (progress < getMax()) { + info.addAction(AccessibilityNodeInfo.ACTION_SCROLL_FORWARD); + } + } + } + + @Override + public boolean performAccessibilityAction(int action, Bundle arguments) { + if (super.performAccessibilityAction(action, arguments)) { + return true; + } + if (!isEnabled()) { + return false; + } + final int progress = getProgress(); + final int increment = Math.max(1, Math.round((float) getMax() / 5)); + switch (action) { + case AccessibilityNodeInfo.ACTION_SCROLL_BACKWARD: { + if (progress <= 0) { + return false; + } + setProgress(progress - increment, true); + onKeyChange(); + return true; + } + case AccessibilityNodeInfo.ACTION_SCROLL_FORWARD: { + if (progress >= getMax()) { + return false; + } + setProgress(progress + increment, true); + onKeyChange(); + return true; + } + } + return false; } } |