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网站建设的要求有哪些方面,谷歌play商店,在哪个网站有兼职做,公司门户官网一、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_d…

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

<!--Copyright (C) 2015 The Android Open Source ProjectLicensed under the Apache License, Version 2.0 (the "License");you may not use this file except in compliance with the License.You may obtain a copy of the License athttp://www.apache.org/licenses/LICENSE-2.0Unless required by applicable law or agreed to in writing, softwaredistributed under the License is distributed on an "AS IS" BASIS,WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.See the License for the specific language governing permissions andlimitations under the License.
-->
<FrameLayoutxmlns:android="http://schemas.android.com/apk/res/android"android:tag="row"android:layout_height="wrap_content"android:layout_width="@dimen/volume_dialog_panel_width"android:clipChildren="false"android:clipToPadding="false"android:gravity="center"android:paddingTop="@dimen/volume_dialog_ringer_rows_padding"android:paddingBottom="@dimen/volume_dialog_ringer_rows_padding"android:background="@drawable/volume_row_rounded_background"android:theme="@style/volume_dialog_theme"><LinearLayoutandroid:layout_height="wrap_content"android:layout_width="@dimen/volume_dialog_panel_width"android:gravity="center"android:layout_gravity="center"android:orientation="vertical" ><TextViewandroid:id="@+id/volume_row_header"android:layout_width="wrap_content"android:layout_height="wrap_content"android:ellipsize="end"android:maxLength="10"android:maxLines="1"android:visibility="gone"android:textColor="?android:attr/colorControlNormal"android:textAppearance="@style/TextAppearance.Volume.Header" /><FrameLayoutandroid:id="@+id/volume_row_slider_frame"android:layout_width="match_parent"android:layout_height="@dimen/volume_row_slider_height"><SeekBarandroid:id="@+id/volume_row_slider"android:paddingLeft="0dp"android:paddingRight="0dp"android:paddingStart="0dp"android:paddingEnd="0dp"android:clickable="true"android:layout_width="@dimen/volume_row_slider_height"android:layout_height="match_parent"android:layout_gravity="center"android:thumb="@null"android:splitTrack="false"android:progressDrawable="@drawable/volume_row_seekbar"android:background="@null"android:layoutDirection="ltr"android:rotation="270" /><include layout="@layout/volume_dnd_icon"/></FrameLayout><com.android.keyguard.AlphaOptimizedImageButtonandroid:visibility="gone"android:id="@+id/volume_row_icon"style="@style/VolumeButtons"android:layout_width="@dimen/volume_dialog_tap_target_size"android:layout_height="@dimen/volume_dialog_tap_target_size"android:background="@drawable/ripple_drawable_20dp"android:layout_marginBottom="@dimen/volume_dialog_row_margin_bottom"android:tint="@color/accent_tint_color_selector"android:soundEffectsEnabled="false" /></LinearLayout></FrameLayout>

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

<layer-list xmlns:android="http://schemas.android.com/apk/res/android"><item android:id="@android:id/background"android:gravity="center_vertical|fill_horizontal"><shape android:shape="rectangle"><size android:height="@dimen/seek_bar_height" /><solid android:color="#eeeeee" /><corners android:radius="@dimen/seek_bar_corner_radius" /></shape></item><item android:id="@android:id/progress"android:gravity="center_vertical|fill_horizontal"><scale android:scaleWidth="100%"><shape android:shape="rectangle"><size android:height="@dimen/seek_bar_height" /><solid android:color="#0091ff" /><corners android:radius="@dimen/seek_bar_corner_radius" /></shape></scale></item>
</layer-list>

五、待续

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