Java ImageButton.setContentDescription方法代码示例

import android.widget.ImageButton; //导入方法依赖的package包/类
/**
 * Builds an {@link ImageButton} from the data in this params. Generated buttons should be
 * placed on the bottom bar. The button's tag will be its id.
 * @param parent The parent that the inflated {@link ImageButton}.
 * @param listener {@link OnClickListener} that should be used with the button.
 * @return Parsed list of {@link CustomButtonParams}, which is empty if the input is invalid.
 */
ImageButton buildBottomBarButton(Context context, ViewGroup parent, OnClickListener listener) {
    if (mIsOnToolbar) return null;

    ImageButton button = (ImageButton) LayoutInflater.from(context)
            .inflate(R.layout.custom_tabs_bottombar_item, parent, false);
    button.setId(mId);
    button.setImageBitmap(mIcon);
    button.setContentDescription(mDescription);
    if (mPendingIntent == null) {
        button.setEnabled(false);
    } else {
        button.setOnClickListener(listener);
    }
    button.setOnLongClickListener(new OnLongClickListener() {
        @Override
        public boolean onLongClick(View view) {
            final int screenWidth = view.getResources().getDisplayMetrics().widthPixels;
            final int screenHeight = view.getResources().getDisplayMetrics().heightPixels;
            final int[] screenPos = new int[2];
            view.getLocationOnScreen(screenPos);
            final int width = view.getWidth();

            Toast toast = Toast.makeText(
                    view.getContext(), view.getContentDescription(), Toast.LENGTH_SHORT);
            toast.setGravity(Gravity.BOTTOM | Gravity.END,
                    screenWidth - screenPos[0] - width / 2,
                    screenHeight - screenPos[1]);
            toast.show();
            return true;
        }
    });
    return button;
}
 

import android.widget.ImageButton; //导入方法依赖的package包/类
/**
 * Constructs a layout for the specified infobar. After calling this, be sure to set the
 * message, the buttons, and/or the custom content using setMessage(), setButtons(), and
 * setCustomContent().
 *
 * @param context The context used to render.
 * @param infoBarView InfoBarView that listens to events.
 * @param iconResourceId ID of the icon to use for the infobar.
 * @param iconBitmap Bitmap for the icon to use, if the resource ID wasn't passed through.
 * @param message The message to show in the infobar.
 */
public InfoBarLayout(Context context, InfoBarView infoBarView, int iconResourceId,
        Bitmap iconBitmap, CharSequence message) {
    super(context);
    mControlLayouts = new ArrayList<InfoBarControlLayout>();

    mInfoBarView = infoBarView;

    // Cache resource values.
    Resources res = getResources();
    mSmallIconSize = res.getDimensionPixelSize(R.dimen.infobar_small_icon_size);
    mSmallIconMargin = res.getDimensionPixelSize(R.dimen.infobar_small_icon_margin);
    mBigIconSize = res.getDimensionPixelSize(R.dimen.infobar_big_icon_size);
    mBigIconMargin = res.getDimensionPixelSize(R.dimen.infobar_big_icon_margin);
    mMarginAboveButtonGroup =
            res.getDimensionPixelSize(R.dimen.infobar_margin_above_button_row);
    mMarginAboveControlGroups =
            res.getDimensionPixelSize(R.dimen.infobar_margin_above_control_groups);
    mPadding = res.getDimensionPixelOffset(R.dimen.infobar_padding);
    mMinWidth = res.getDimensionPixelSize(R.dimen.infobar_min_width);
    mAccentColor = ApiCompatibilityUtils.getColor(res, R.color.infobar_accent_blue);

    // Set up the close button. Apply padding so it has a big touch target.
    mCloseButton = new ImageButton(context);
    mCloseButton.setId(R.id.infobar_close_button);
    mCloseButton.setImageResource(R.drawable.btn_close);
    TypedArray a = getContext().obtainStyledAttributes(
            new int [] {R.attr.selectableItemBackground});
    Drawable closeButtonBackground = a.getDrawable(0);
    a.recycle();
    mCloseButton.setBackground(closeButtonBackground);
    mCloseButton.setPadding(mPadding, mPadding, mPadding, mPadding);
    mCloseButton.setOnClickListener(this);
    mCloseButton.setContentDescription(res.getString(R.string.infobar_close));
    mCloseButton.setLayoutParams(new LayoutParams(0, -mPadding, -mPadding, -mPadding));

    // Set up the icon.
    if (iconResourceId != 0 || iconBitmap != null) {
        mIconView = new ImageView(context);
        if (iconResourceId != 0) {
            mIconView.setImageResource(iconResourceId);
        } else if (iconBitmap != null) {
            mIconView.setImageBitmap(iconBitmap);
        }
        mIconView.setLayoutParams(new LayoutParams(0, 0, mSmallIconMargin, 0));
        mIconView.getLayoutParams().width = mSmallIconSize;
        mIconView.getLayoutParams().height = mSmallIconSize;
        mIconView.setFocusable(false);
    }

    // Set up the message view.
    mMessageMainText = message;
    mMessageLayout = new InfoBarControlLayout(context);
    mMessageTextView = mMessageLayout.addMainMessage(prepareMainMessageString());
}
 

import android.widget.ImageButton; //导入方法依赖的package包/类
/**
 * Updates the custom buttons on bottom bar area.
 * @param params The {@link CustomButtonParams} that describes the button to update.
 */
public void updateBottomBarButtons(CustomButtonParams params) {
    ImageButton button = (ImageButton) getBottomBarView().findViewById(params.getId());
    button.setContentDescription(params.getDescription());
    button.setImageDrawable(params.getIcon(mActivity.getResources()));
}
 

import android.widget.ImageButton; //导入方法依赖的package包/类
private void addIconTab(final int position, int resId, String contentDescription) {

    ImageButton tab = new ImageButton(getContext());
    tab.setContentDescription(contentDescription);
    tab.setImageResource(resId);

    addTab(position, tab);

  }