seekbar | 易学教程

Android a seekbar for adjusting bitmap brightness

阅读更多关于 Android a seekbar for adjusting bitmap brightness

问题 I have tryed many codes, and looked at Android developers but couldn't make it work. I want the seek bar to adjust my bitmap image brightness 回答1: check the example given at Increase/Decrease Brightness of Image and do as shown below on seekbar progress changes int brightness; SeekBar seekbarbrightness=(SeekBar)findViewById(R.id.seekBar1); seekbarbrightness.setOnSeekBarChangeListener(new OnSeekBarChangeListener() { @Override public void onStopTrackingTouch(SeekBar arg0) { // TODO Auto

Android a seekbar for adjusting bitmap brightness

阅读更多关于 Android a seekbar for adjusting bitmap brightness

Cannot resolve symbol 'OnSeekBarChangeListener'

阅读更多关于 Cannot resolve symbol 'OnSeekBarChangeListener'

问题 I'm trying to create a SeekBar listener, but for some reason the following: final SeekBar birthdaySlider = (SeekBar) findViewById(R.id.birthdaySlider); birthdaySlider.setOnSeekBarChangeListener(new birthdaySlider.OnSeekBarChangeListener() {}); Returns the error: Cannot resolve symbol 'OnSeekBarChangeListener' 回答1: Correct way to do : final SeekBar birthdaySlider = (SeekBar) findViewById(R.id.birthdaySlider); birthdaySlider.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {

seekTo restarting playback on exoplayer

阅读更多关于 seekTo restarting playback on exoplayer

问题 While trying to call seekTo function of exoplayer instance the playback is getting reset and playing from start after buffering live audio stream. As some blogs and gists suggest tried calling seekto after pausing exoplayer and then starting the playback again after calling seekto but got no effect on it, its just re-buffering playback and starting again. Below is how i tried so far: here is my onCreate event where the seekbar events are handled along with exoplayer seekto calls protected

seekTo restarting playback on exoplayer

阅读更多关于 seekTo restarting playback on exoplayer

How to prevent android talkback to speak seekbar progress

阅读更多关于 How to prevent android talkback to speak seekbar progress

来源： https://stackoverflow.com/questions/38740141/how-to-prevent-android-talkback-to-speak-seekbar-progress

android 10 seek bar on notification

阅读更多关于 android 10 seek bar on notification

问题 does anyone know about the seekbar function on notifications in android 10? I can't seem to get the position indicator to show the current position. the bar is just blank but I can seek the media clicking the bar in the notification. I have the normal notification builder code and I have added this to make the seekbar clickable in the "MediaPlayer.Event.Playing" event of libvlc MediaMetadataCompat.Builder metadataBuilder = new MediaMetadataCompat.Builder(); metadataBuilder.putLong

Android 能够暂停的录音功能

阅读更多关于 Android 能够暂停的录音功能

Android ApI提供了MediaRecorder和AudioRecord两个类给开发者来很方便地实现音视频的录制(前者可以实现音频和视频的录制，后者只能实现音频的录制)。这两个类都提供了start()和stop()方法用于开始和结束音频或视频的录制，但令人费解的是这两个类都没有提供pause()方法用于暂停录制音视频，因为在实际应用当中，暂停录制的功能是非常有必要的Android 实现能够暂停的录音功能需实现音频录制的暂停功能，并且生成的音频文件格式必须是m4a格式为什么项目中音频文件一定要采用m4a格式的呢？有以下几点原因： 1. 录制相同时间的音频，使用m4a格式存储的文件的大小要比使用其它格式类型存储的文件的大小要小(通过实验多次，在相同采样率16000的情况下，一般录制5分钟的音频，采用m4a格式存储的音频文件只有1.2Mb，而采用arm、mp3及其它格式的一般都有2-5Mb)，这样当用户需要下载或上传录制的音频文件时，可以节省流量，并且相同压缩率的前提下，m4a格式音频的音质相比其它格式的也更高； 2.产品同时拥有Android客户端和IOS客户端，那为了避免使用Android客户端的用户录制的音频上传到服务器之后，使用IOS客户端的用户下载下来发生无法播放的问题，我们需统一录制音频的存储格式

（四）Android：音乐特效控制

阅读更多关于（四）Android：音乐特效控制

Android提供了用于音乐播放时的音效控制器，比如均衡器、重低音以及显示音乐波形等。这些功能被定义在AudioEffect的子类中完成 [1] ： AcousticEchoCanceler:回声消除器 AutomaticGainControl:自动增强控制器 NoiseSuppressor:噪音抑制器 BassBoost:重低音调节器 Equalizer:均衡器 PresetReverb:预设音场控制器 Visualizer:示波器 Demo下载地址： Android：音乐特效控制demo 注意：Demo中如果跟该博客有冲突，以博客为准。在正文开始之前，我先说一声，我的音频文件(jay_qingtian.mp3)放在了手机的Music文件夹下。下面所有播放按钮的实现都是下面的样子，所以在下面各小节中我就省略不写播放的实现了 val music = "${Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_MUSIC).absolutePath}/jay_qingtian.mp3" private val mp = MediaPlayer() ... XXX.setOnClickListener { v -> v.isEnabled = false mp.setDataSource(music)

Android 进度条

阅读更多关于 Android 进度条

1 <?xml version="1.0" encoding="utf-8"?> 2 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 3 xmlns:tools="http://schemas.android.com/tools" 4 android:layout_width="match_parent" 5 android:layout_height="match_parent" 6 tools:context="com.example.administrator.android.TestActivity4" 7 android:orientation="vertical"> 8  9 <ProgressBar 10 android:layout_width="match_parent" 11 android:layout_height="wrap_content" 12 style="?android:attr/progressBarStyleHorizontal" 13 android:progress="30" 14 android:secondaryProgress="67" 15 android:max="100" 16 android:id="@+id