Android 修改SystemUI 音量条的声音进度条样式

一、前言

        Android System UI 开发经常会遇到修改音量进度条样式的需求，主要涉及的类有VolumeDialogImpl与xml文件，接下来会逐步实现流程。先看看效果。

修改前

修改后

二、找到对应类

通过aidegen 打断点调试对应代码类VolumeDialogImpl定位到volume_dialog就是对话框布局。mDialog.setContentView(R.layout.volume_dialog);

类路径：frameworks/base/packages/SystemUI/src/com/android/systemui/volume/VolumeDialogImpl.java

private void initDialog() {
        mDialog = new CustomDialog(mContext);

        initDimens();

        mConfigurableTexts = new ConfigurableTexts(mContext);
        mHovering = false;
        mShowing = false;
        mWindow = mDialog.getWindow();
        mWindow.requestFeature(Window.FEATURE_NO_TITLE);
        mWindow.setBackgroundDrawable(new ColorDrawable(Color.TRANSPARENT));
        mWindow.clearFlags(WindowManager.LayoutParams.FLAG_DIM_BEHIND
                | WindowManager.LayoutParams.FLAG_LAYOUT_INSET_DECOR);
        mWindow.addFlags(WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE
                | WindowManager.LayoutParams.FLAG_NOT_TOUCH_MODAL
                | WindowManager.LayoutParams.FLAG_SHOW_WHEN_LOCKED
                | WindowManager.LayoutParams.FLAG_WATCH_OUTSIDE_TOUCH
                | WindowManager.LayoutParams.FLAG_HARDWARE_ACCELERATED);
        mWindow.addPrivateFlags(WindowManager.LayoutParams.PRIVATE_FLAG_TRUSTED_OVERLAY);
        mWindow.setType(WindowManager.LayoutParams.TYPE_VOLUME_OVERLAY);
        mWindow.setWindowAnimations(com.android.internal.R.style.Animation_Toast);
        WindowManager.LayoutParams lp = mWindow.getAttributes();
        lp.format = PixelFormat.TRANSLUCENT;
        lp.setTitle(VolumeDialogImpl.class.getSimpleName());
        lp.windowAnimations = -1;
        lp.gravity = mContext.getResources().getInteger(R.integer.volume_dialog_gravity);
        mWindow.setAttributes(lp);
        mWindow.setLayout(WRAP_CONTENT, WRAP_CONTENT);

        mDialog.setContentView(R.layout.volume_dialog);
        mDialogView = mDialog.findViewById(R.id.volume_dialog);
        mDialogView.setAlpha(0);
        mDialog.setCanceledOnTouchOutside(true);

三、音量条代码

 @SuppressLint("InflateParams")
    private void initRow(final VolumeRow row, final int stream, int iconRes, int iconMuteRes,
            boolean important, boolean defaultStream) {
        row.stream = stream;
        row.iconRes = iconRes;
        row.iconMuteRes = iconMuteRes;
        row.important = important;
        row.defaultStream = defaultStream;
        row.view = mDialog.getLayoutInflater().inflate(R.layout.volume_dialog_row, null);
        row.view.setId(row.stream);
        row.view.setTag(row);
        row.header = row.view.findViewById(R.id.volume_row_header);
        row.header.setId(20 * row.stream);
        if (stream == STREAM_ACCESSIBILITY) {
            row.header.setFilters(new InputFilter[] {new InputFilter.LengthFilter(13)});
        }
        row.dndIcon = row.view.findViewById(R.id.dnd_icon);
        row.slider = row.view.findViewById(R.id.volume_row_slider);
        row.slider.setOnSeekBarChangeListener(new VolumeSeekBarChangeListener(row));
        row.number = row.view.findViewById(R.id.volume_number);

        row.anim = null;

        final LayerDrawable seekbarDrawable =
                (LayerDrawable) mContext.getDrawable(R.drawable.volume_row_seekbar);

        final LayerDrawable seekbarProgressDrawable = (LayerDrawable)
                ((RoundedCornerProgressDrawable) seekbarDrawable.findDrawableByLayerId(
                        android.R.id.progress)).getDrawable();

        row.sliderProgressSolid = seekbarProgressDrawable.findDrawableByLayerId(
                R.id.volume_seekbar_progress_solid);
        final Drawable sliderProgressIcon = seekbarProgressDrawable.findDrawableByLayerId(
                        R.id.volume_seekbar_progress_icon);
        row.sliderProgressIcon = sliderProgressIcon != null ? (AlphaTintDrawableWrapper)
                ((RotateDrawable) sliderProgressIcon).getDrawable() : null;

        row.slider.setProgressDrawable(seekbarDrawable);

        row.icon = row.view.findViewById(R.id.volume_row_icon);

        row.setIcon(iconRes, mContext.getTheme());

        if (row.icon != null) {
            if (row.stream != AudioSystem.STREAM_ACCESSIBILITY) {
                row.icon.setOnClickListener(v -> {
                    Events.writeEvent(Events.EVENT_ICON_CLICK, row.stream, row.iconState);
                    mController.setActiveStream(row.stream);
                    if (row.stream == AudioManager.STREAM_RING) {
                        final boolean hasVibrator = mController.hasVibrator();
                        if (mState.ringerModeInternal == AudioManager.RINGER_MODE_NORMAL) {
                            if (hasVibrator) {
                                mController.setRingerMode(AudioManager.RINGER_MODE_VIBRATE, false);
                            } else {
                                final boolean wasZero = row.ss.level == 0;
                                mController.setStreamVolume(stream,
                                        wasZero ? row.lastAudibleLevel : 0);
                            }
                        } else {
                            mController.setRingerMode(
                                    AudioManager.RINGER_MODE_NORMAL, false);
                            if (row.ss.level == 0) {
                                mController.setStreamVolume(stream, 1);
                            }
                        }
                    } else {
                        final boolean vmute = row.ss.level == row.ss.levelMin;
                        mController.setStreamVolume(stream,
                                vmute ? row.lastAudibleLevel : row.ss.levelMin);
                    }
                    row.userAttempt = 0;  // reset the grace period, slider updates immediately
                });
            } else {
                row.icon.setImportantForAccessibility(View.IMPORTANT_FOR_ACCESSIBILITY_NO);
            }
        }
    }

四、音量条布局则位于volume_dialog_row.xml中

对SeekBar音量条进行修改增加样式

android:thumb="@drawable/ic_launcher_round"
android:progressDrawable="@drawable/volume_row_seekbar"

其中icon progress 就是一张ic_launcher_round图片
而volume_row_seekbar.xml

五、待续