Audio android上声音播放器的改进_Audio_Media_Playback_Assets_Piano

Audio android上声音播放器的改进

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Audio android上声音播放器的改进,audio,media,playback,assets,piano,Audio,Media,Playback,Assets,Piano,我正在尝试制作一个简单的钢琴应用程序。我找到了这个教程我下载了这个链接上的文件并导入了它。我运行这个应用程序，上面有4个按钮，可以播放4个不同的笔记，这些笔记加载到资产文件中然后我试图修改这个项目来制作一个钢琴应用程序首先，我从xml中删除了这些红色按钮我在背景上加了一个钢琴图像然后我在每个键上创建了按钮 xml文件为 <?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http:

我正在尝试制作一个简单的钢琴应用程序。我找到了这个教程

我下载了这个链接上的文件并导入了它。我运行这个应用程序，上面有4个按钮，可以播放4个不同的笔记，这些笔记加载到资产文件中

然后我试图修改这个项目来制作一个钢琴应用程序

首先，我从xml中删除了这些红色按钮

我在背景上加了一个钢琴图像

然后我在每个键上创建了按钮

xml文件为

  <?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:layout_gravity="fill_vertical"
    android:background="@drawable/images"
    android:orientation="vertical" >

    <Button
        android:id="@+id/buttonC4"
        android:layout_width="294dp"
        android:layout_height="60dp"
        android:background="@android:color/transparent"
        android:gravity="center_vertical|center_horizontal" />

    <Button
        android:id="@+id/buttonD4"
        android:layout_width="294dp"
        android:layout_height="60dp"
        android:background="@android:color/transparent"
        android:gravity="center_vertical|center_horizontal" />

    <Button
        android:id="@+id/buttonE4"
        android:layout_width="294dp"
        android:layout_height="60dp"
        android:background="@android:color/transparent"
        android:gravity="center_vertical|center_horizontal" />

    <Button
        android:id="@+id/buttonF4"
        android:layout_width="294dp"
        android:layout_height="58dp"
        android:background="@android:color/transparent"
        android:gravity="center_vertical|center_horizontal" />


    <Button
        android:id="@+id/buttonG4"
        android:layout_width="294dp"
        android:layout_height="58dp"
        android:background="@android:color/transparent"
        android:gravity="center_vertical|center_horizontal" />

    <Button
        android:id="@+id/buttonA4"
        android:layout_width="294dp"
        android:layout_height="60dp"
        android:background="@android:color/transparent"
        android:gravity="center_vertical|center_horizontal" />

    <Button
        android:id="@+id/buttonB4"
        android:layout_width="294dp"
        android:layout_height="58dp"
        android:background="@android:color/transparent"
        android:gravity="center_vertical|center_horizontal" />

    <Button
         android:id="@+id/buttonC5"
        android:layout_width="294dp"
        android:layout_height="58dp"
        android:background="@android:color/transparent"
        android:gravity="center_vertical|center_horizontal" />

    <Button
        android:id="@+id/buttonD5"
        android:layout_width="294dp"
        android:layout_height="58dp"
        android:background="@android:color/transparent"
        android:gravity="center_vertical|center_horizontal" />


    <Button
        android:id="@+id/buttonE5"
        android:layout_width="294dp"
        android:layout_height="58dp"
        android:background="@android:color/transparent"
        android:gravity="center_vertical|center_horizontal" />

</LinearLayout>

然后我换了音轨课。我将格式更改为wav文件

public void run()
    {
        try
        {
            String path = note + ".wav";

其他所有内容与原始项目中的内容相同

但是这个应用程序不能正常工作

当我运行该应用程序并单击某个键上的透明按钮时，它会播放一个声音，但声音与实际不同

听起来有些不同。我可以说是电子版的音符

当我单击其他一些键时，应用程序崩溃。它说应用程序意外停止

怎么了？我该怎么做才能让它工作？原因可能是我下载的文件。我需要找什么样的笔记？这个项目的比特数或持续时间是否有特殊格式

这对我来说非常重要，如果你可以从链接下载文件并运行，你可以看到它是如何工作的。你可以建议我修改它的方法。我希望你能帮助我。这是logcat：

05-13 19:49:55.580: D/AndroidRuntime(485): Shutting down VM
05-13 19:49:55.580: W/dalvikvm(485): threadid=1: thread exiting with uncaught exception (group=0x4001d800)
05-13 19:49:55.600: E/AndroidRuntime(485): FATAL EXCEPTION: main
05-13 19:49:55.600: E/AndroidRuntime(485): java.lang.RuntimeException: Unable to start activity ComponentInfo{net.martinhoeller/net.martinhoeller.PianoTestActivity}: android.view.InflateException: Binary XML file line #9: Error inflating class ButtonView
05-13 19:49:55.600: E/AndroidRuntime(485):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2663)
05-13 19:49:55.600: E/AndroidRuntime(485):  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679)
05-13 19:49:55.600: E/AndroidRuntime(485):  at android.app.ActivityThread.access$2300(ActivityThread.java:125)
05-13 19:49:55.600: E/AndroidRuntime(485):  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033)
05-13 19:49:55.600: E/AndroidRuntime(485):  at android.os.Handler.dispatchMessage(Handler.java:99)
05-13 19:49:55.600: E/AndroidRuntime(485):  at android.os.Looper.loop(Looper.java:123)
05-13 19:49:55.600: E/AndroidRuntime(485):  at android.app.ActivityThread.main(ActivityThread.java:4627)
05-13 19:49:55.600: E/AndroidRuntime(485):  at java.lang.reflect.Method.invokeNative(Native Method)
05-13 19:49:55.600: E/AndroidRuntime(485):  at java.lang.reflect.Method.invoke(Method.java:521)
05-13 19:49:55.600: E/AndroidRuntime(485):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
05-13 19:49:55.600: E/AndroidRuntime(485):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
05-13 19:49:55.600: E/AndroidRuntime(485):  at dalvik.system.NativeStart.main(Native Method)
05-13 19:49:55.600: E/AndroidRuntime(485): Caused by: android.view.InflateException: Binary XML file line #9: Error inflating class ButtonView
05-13 19:49:55.600: E/AndroidRuntime(485):  at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:576)
05-13 19:49:55.600: E/AndroidRuntime(485):  at android.view.LayoutInflater.rInflate(LayoutInflater.java:618)
05-13 19:49:55.600: E/AndroidRuntime(485):  at android.view.LayoutInflater.inflate(LayoutInflater.java:407)
05-13 19:49:55.600: E/AndroidRuntime(485):  at android.view.LayoutInflater.inflate(LayoutInflater.java:320)
05-13 19:49:55.600: E/AndroidRuntime(485):  at android.view.LayoutInflater.inflate(LayoutInflater.java:276)
05-13 19:49:55.600: E/AndroidRuntime(485):  at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:198)
05-13 19:49:55.600: E/AndroidRuntime(485):  at android.app.Activity.setContentView(Activity.java:1647)
05-13 19:49:55.600: E/AndroidRuntime(485):  at net.martinhoeller.PianoTestActivity.onCreate(PianoTestActivity.java:23)
05-13 19:49:55.600: E/AndroidRuntime(485):  at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
05-13 19:49:55.600: E/AndroidRuntime(485):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2627)
05-13 19:49:55.600: E/AndroidRuntime(485):  ... 11 more
05-13 19:49:55.600: E/AndroidRuntime(485): Caused by: java.lang.ClassNotFoundException: android.view.ButtonView in loader dalvik.system.PathClassLoader[/data/app/net.martinhoeller-1.apk]
05-13 19:49:55.600: E/AndroidRuntime(485):  at dalvik.system.PathClassLoader.findClass(PathClassLoader.java:243)
05-13 19:49:55.600: E/AndroidRuntime(485):  at java.lang.ClassLoader.loadClass(ClassLoader.java:573)
05-13 19:49:55.600: E/AndroidRuntime(485):  at java.lang.ClassLoader.loadClass(ClassLoader.java:532)
05-13 19:49:55.600: E/AndroidRuntime(485):  at android.view.LayoutInflater.createView(LayoutInflater.java:466)
05-13 19:49:55.600: E/AndroidRuntime(485):  at android.view.LayoutInflater.onCreateView(LayoutInflater.java:544)
05-13 19:49:55.600: E/AndroidRuntime(485):  at com.android.internal.policy.impl.PhoneLayoutInflater.onCreateView(PhoneLayoutInflater.java:66)
05-13 19:49:55.600: E/AndroidRuntime(485):  at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:563)
05-13 19:49:55.600: E/AndroidRuntime(485):  ... 20 more
05-13 19:52:22.293: D/AndroidRuntime(513): Shutting down VM
05-13 19:52:22.293: W/dalvikvm(513): threadid=1: thread exiting with uncaught exception (group=0x4001d800)
05-13 19:52:22.309: E/AndroidRuntime(513): FATAL EXCEPTION: main
05-13 19:52:22.309: E/AndroidRuntime(513): java.lang.ArrayIndexOutOfBoundsException
05-13 19:52:22.309: E/AndroidRuntime(513):  at net.martinhoeller.PianoTestActivity.onTouchEvent(PianoTestActivity.java:66)
05-13 19:52:22.309: E/AndroidRuntime(513):  at android.app.Activity.dispatchTouchEvent(Activity.java:2089)
05-13 19:52:22.309: E/AndroidRuntime(513):  at com.android.internal.policy.impl.PhoneWindow$DecorView.dispatchTouchEvent(PhoneWindow.java:1655)
05-13 19:52:22.309: E/AndroidRuntime(513):  at android.view.ViewRoot.handleMessage(ViewRoot.java:1785)
05-13 19:52:22.309: E/AndroidRuntime(513):  at android.os.Handler.dispatchMessage(Handler.java:99)
05-13 19:52:22.309: E/AndroidRuntime(513):  at android.os.Looper.loop(Looper.java:123)
05-13 19:52:22.309: E/AndroidRuntime(513):  at android.app.ActivityThread.main(ActivityThread.java:4627)
05-13 19:52:22.309: E/AndroidRuntime(513):  at java.lang.reflect.Method.invokeNative(Native Method)
05-13 19:52:22.309: E/AndroidRuntime(513):  at java.lang.reflect.Method.invoke(Method.java:521)
05-13 19:52:22.309: E/AndroidRuntime(513):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
05-13 19:52:22.309: E/AndroidRuntime(513):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
05-13 19:52:22.309: E/AndroidRuntime(513):  at dalvik.system.NativeStart.main(Native Method)

你似乎有很多问题。让我们先尝试修复充气碰撞的布局

List<Button> buttons;
...
buttons = new ArrayList<Button>();
buttons.add((Button)findViewById(R.id.buttonC4));
buttons.add((Button)findViewById(R.id.buttonD4));
...
for (Button button : buttons) {
    button.setOnClickListener(this);
}

这将正确地转换布局的按钮视图，并为每个视图设置OnClickListener。

您的活动需要实现View.OnClickListener才能使用setOnClickListenerthis。如果将单击处理分离，则替换为相应的类。在这种情况下，该类将实现OnClickListener，而不是您的活动。

我们需要查看logcat stacktraces以了解崩溃情况以及您至少用于播放注释的方法，以提供帮助。您在版面中使用文本视图而不是按钮视图类型有什么特别的原因吗？谢谢您的评论。如何在这里添加logcat？我没有更改任何其他内容。其余代码部分与原始代码部分相同。资产文件夹中有注释文件C4.wav、E4。wav等…您试图使用一个名为ButtonView的类，但该类不存在或未正确导入到您的项目中。你确定这就是正在使用的布局吗？请从您的活动中添加onCreate。不，这是在我将每个textview更改为buttonview后发生的。谢谢，但您检查了链接吗？我快速浏览了一下，但我不打算通读整个内容，也不打算自己尝试创建一个工作实现。你需要精心设计你的问题，这样它就包含了人们帮助你所需的所有信息，而无需花费大量时间重新创建你的所有代码。清晰，简洁，完整和直接的方式。实际上，原来的项目工程，因为有4个声音文件，我只想添加3个以上，并创建一个简单的钢琴应用程序与7个音符。原来的项目4个音符正在播放，但我下载的其他3个文件没有正常播放或有时从未播放过。我刚刚添加了3个以上的原始文件。我在项目中给他们打电话，就像原来的一样。但是这三个音符听起来不像音符，它们就像汽车的喇叭。我是认真的。他们被当作别的东西来玩。我不知道为什么

05-13 19:49:55.580: D/AndroidRuntime(485): Shutting down VM
05-13 19:49:55.580: W/dalvikvm(485): threadid=1: thread exiting with uncaught exception (group=0x4001d800)
05-13 19:49:55.600: E/AndroidRuntime(485): FATAL EXCEPTION: main
05-13 19:49:55.600: E/AndroidRuntime(485): java.lang.RuntimeException: Unable to start activity ComponentInfo{net.martinhoeller/net.martinhoeller.PianoTestActivity}: android.view.InflateException: Binary XML file line #9: Error inflating class ButtonView
05-13 19:49:55.600: E/AndroidRuntime(485):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2663)
05-13 19:49:55.600: E/AndroidRuntime(485):  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679)
05-13 19:49:55.600: E/AndroidRuntime(485):  at android.app.ActivityThread.access$2300(ActivityThread.java:125)
05-13 19:49:55.600: E/AndroidRuntime(485):  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033)
05-13 19:49:55.600: E/AndroidRuntime(485):  at android.os.Handler.dispatchMessage(Handler.java:99)
05-13 19:49:55.600: E/AndroidRuntime(485):  at android.os.Looper.loop(Looper.java:123)
05-13 19:49:55.600: E/AndroidRuntime(485):  at android.app.ActivityThread.main(ActivityThread.java:4627)
05-13 19:49:55.600: E/AndroidRuntime(485):  at java.lang.reflect.Method.invokeNative(Native Method)
05-13 19:49:55.600: E/AndroidRuntime(485):  at java.lang.reflect.Method.invoke(Method.java:521)
05-13 19:49:55.600: E/AndroidRuntime(485):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
05-13 19:49:55.600: E/AndroidRuntime(485):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
05-13 19:49:55.600: E/AndroidRuntime(485):  at dalvik.system.NativeStart.main(Native Method)
05-13 19:49:55.600: E/AndroidRuntime(485): Caused by: android.view.InflateException: Binary XML file line #9: Error inflating class ButtonView
05-13 19:49:55.600: E/AndroidRuntime(485):  at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:576)
05-13 19:49:55.600: E/AndroidRuntime(485):  at android.view.LayoutInflater.rInflate(LayoutInflater.java:618)
05-13 19:49:55.600: E/AndroidRuntime(485):  at android.view.LayoutInflater.inflate(LayoutInflater.java:407)
05-13 19:49:55.600: E/AndroidRuntime(485):  at android.view.LayoutInflater.inflate(LayoutInflater.java:320)
05-13 19:49:55.600: E/AndroidRuntime(485):  at android.view.LayoutInflater.inflate(LayoutInflater.java:276)
05-13 19:49:55.600: E/AndroidRuntime(485):  at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:198)
05-13 19:49:55.600: E/AndroidRuntime(485):  at android.app.Activity.setContentView(Activity.java:1647)
05-13 19:49:55.600: E/AndroidRuntime(485):  at net.martinhoeller.PianoTestActivity.onCreate(PianoTestActivity.java:23)
05-13 19:49:55.600: E/AndroidRuntime(485):  at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
05-13 19:49:55.600: E/AndroidRuntime(485):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2627)
05-13 19:49:55.600: E/AndroidRuntime(485):  ... 11 more
05-13 19:49:55.600: E/AndroidRuntime(485): Caused by: java.lang.ClassNotFoundException: android.view.ButtonView in loader dalvik.system.PathClassLoader[/data/app/net.martinhoeller-1.apk]
05-13 19:49:55.600: E/AndroidRuntime(485):  at dalvik.system.PathClassLoader.findClass(PathClassLoader.java:243)
05-13 19:49:55.600: E/AndroidRuntime(485):  at java.lang.ClassLoader.loadClass(ClassLoader.java:573)
05-13 19:49:55.600: E/AndroidRuntime(485):  at java.lang.ClassLoader.loadClass(ClassLoader.java:532)
05-13 19:49:55.600: E/AndroidRuntime(485):  at android.view.LayoutInflater.createView(LayoutInflater.java:466)
05-13 19:49:55.600: E/AndroidRuntime(485):  at android.view.LayoutInflater.onCreateView(LayoutInflater.java:544)
05-13 19:49:55.600: E/AndroidRuntime(485):  at com.android.internal.policy.impl.PhoneLayoutInflater.onCreateView(PhoneLayoutInflater.java:66)
05-13 19:49:55.600: E/AndroidRuntime(485):  at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:563)
05-13 19:49:55.600: E/AndroidRuntime(485):  ... 20 more
05-13 19:52:22.293: D/AndroidRuntime(513): Shutting down VM
05-13 19:52:22.293: W/dalvikvm(513): threadid=1: thread exiting with uncaught exception (group=0x4001d800)
05-13 19:52:22.309: E/AndroidRuntime(513): FATAL EXCEPTION: main
05-13 19:52:22.309: E/AndroidRuntime(513): java.lang.ArrayIndexOutOfBoundsException
05-13 19:52:22.309: E/AndroidRuntime(513):  at net.martinhoeller.PianoTestActivity.onTouchEvent(PianoTestActivity.java:66)
05-13 19:52:22.309: E/AndroidRuntime(513):  at android.app.Activity.dispatchTouchEvent(Activity.java:2089)
05-13 19:52:22.309: E/AndroidRuntime(513):  at com.android.internal.policy.impl.PhoneWindow$DecorView.dispatchTouchEvent(PhoneWindow.java:1655)
05-13 19:52:22.309: E/AndroidRuntime(513):  at android.view.ViewRoot.handleMessage(ViewRoot.java:1785)
05-13 19:52:22.309: E/AndroidRuntime(513):  at android.os.Handler.dispatchMessage(Handler.java:99)
05-13 19:52:22.309: E/AndroidRuntime(513):  at android.os.Looper.loop(Looper.java:123)
05-13 19:52:22.309: E/AndroidRuntime(513):  at android.app.ActivityThread.main(ActivityThread.java:4627)
05-13 19:52:22.309: E/AndroidRuntime(513):  at java.lang.reflect.Method.invokeNative(Native Method)
05-13 19:52:22.309: E/AndroidRuntime(513):  at java.lang.reflect.Method.invoke(Method.java:521)
05-13 19:52:22.309: E/AndroidRuntime(513):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
05-13 19:52:22.309: E/AndroidRuntime(513):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
05-13 19:52:22.309: E/AndroidRuntime(513):  at dalvik.system.NativeStart.main(Native Method)

List<Button> buttons;
...
buttons = new ArrayList<Button>();
buttons.add((Button)findViewById(R.id.buttonC4));
buttons.add((Button)findViewById(R.id.buttonD4));
...
for (Button button : buttons) {
    button.setOnClickListener(this);
}