如何去除Android5.1音量下部分

本文是基於Android5.1的代碼

                             Android原生下拉欄樣式（此圖是轉載的）

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                                          怎去紅色部分的呢？（此圖是轉載的）

很簡單,直接隱藏掉就行了,接下來找到我們的路徑:

frameworks\base\packages\SystemUI\src\com\android\systemui\volume\ZenModePanel.java

 private void updateWidgets() {
        if (mTransitionHelper.isTransitioning()) {
            mTransitionHelper.pendingUpdateWidgets();
            return;
        }
        final int zen = getSelectedZen(Global.ZEN_MODE_OFF);
        final boolean zenOff = zen == Global.ZEN_MODE_OFF;
        final boolean zenImportant = zen == Global.ZEN_MODE_IMPORTANT_INTERRUPTIONS;
        final boolean zenNone = zen == Global.ZEN_MODE_NO_INTERRUPTIONS;
        final boolean expanded = !mHidden && mExpanded;

//      mZenButtons.setVisibility(mHidden ? GONE : VISIBLE);
        mZenButtons.setVisibility(GONE);
        
        mZenSubhead.setVisibility(!mHidden && !zenOff ? VISIBLE : GONE);
        mZenSubheadExpanded.setVisibility(expanded ? VISIBLE : GONE);
        mZenSubheadCollapsed.setVisibility(!expanded ? VISIBLE : GONE);
        mMoreSettings.setVisibility(zenImportant && expanded ? VISIBLE : GONE);
        mZenConditions.setVisibility(!zenOff && expanded ? VISIBLE : GONE);

        if (zenNone) {
            /// M: Support "Operator plugin - customize zen none text". @{
            String zenNoneTitle = mContext.getString(R.string.zen_no_interruptions_with_warning);
            zenNoneTitle = PluginFactory.getVolumePlugin(mContext)
                    .customizeZenModeNoInterruptionsTitle(zenNoneTitle);
            /// M: Support "Operator plugin - customize zen none text". @}

            mZenSubheadExpanded.setText(zenNoneTitle);
            mZenSubheadCollapsed.setText(mExitConditionText);
        } else if (zenImportant) {
            mZenSubheadExpanded.setText(R.string.zen_important_interruptions);
            mZenSubheadCollapsed.setText(mExitConditionText);
        }
        mZenSubheadExpanded.setTextColor(zenNone && mPrefs.isNoneDangerous()
                ? mSubheadWarningColor : mSubheadColor);
    }

mZenButtons.setVisibility(mHidden ? GONE : VISIBLE) 直接註釋掉或 mZenButtons.setVisibility(GONE);