Android中奇怪的类型转换错误

我有一个android布局，如下所示：

Bit pattern --> aaa
在运行时对多行字符串的更改内容将导致Send命令按钮下移。为了将按钮保持在同一位置，我更改了组件的位置，如下所示：

在这两种情况下，xml文件的内容似乎都相同（LinearLayout如果有区别，则使用该文件）

<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:gravity="clip_horizontal"
    android:orientation="vertical" >

    <TextView
        android:id="@+id/freqIndxTextView_id"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/freqIndxTextView_string" />

    <TextView
        android:id="@+id/freqIndxValTextView_id"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/freqIndxValTextView_string" />

    <SeekBar
        android:id="@+id/freqIndxSeekBar_id"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginLeft="20dp" />

    <TextView
        android:id="@+id/gainLevelTextView_id"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/gainLevelTextView_string" />

    <TextView
        android:id="@+id/gainLevelValTextView_id"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/gainLevelValTextView_string" />

    <SeekBar
        android:id="@+id/gainLevelSeekBar_id"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginLeft="20dp" />

    <Button
        android:id="@+id/btnInSituActivitySend_id"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:onClick="InSituActivitySend_click"
        android:text="@string/btnInSituActivitySend_string" />

    <TextView
        android:id="@+id/bitPatternTextView_id"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/bitPatternTextView_string" />

    <TextView
        android:id="@+id/bitPatternValTextView_id"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/bitPatternValTextView_string" />

</LinearLayout>  

但是，在第二种情况下，当此活动开始时，出现错误，应用程序关闭：

01-30 10:38:43.351: E/AndroidRuntime(3097): FATAL EXCEPTION: main
01-30 10:38:43.351: E/AndroidRuntime(3097): Process: com.example.fourcommandmenu, PID: 3097
01-30 10:38:43.351: E/AndroidRuntime(3097): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.fourcommandmenu/com.example.fourcommandmenu.InSituActivity}: java.lang.ClassCastException: android.widget.TextView cannot be cast to android.widget.Button
01-30 10:38:43.351: E/AndroidRuntime(3097):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2184)
01-30 10:38:43.351: E/AndroidRuntime(3097):     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2233)
01-30 10:38:43.351: E/AndroidRuntime(3097):     at android.app.ActivityThread.access$800(ActivityThread.java:135)
01-30 10:38:43.351: E/AndroidRuntime(3097):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1196)
01-30 10:38:43.351: E/AndroidRuntime(3097):     at android.os.Handler.dispatchMessage(Handler.java:102)
01-30 10:38:43.351: E/AndroidRuntime(3097):     at android.os.Looper.loop(Looper.java:136)
01-30 10:38:43.351: E/AndroidRuntime(3097):     at android.app.ActivityThread.main(ActivityThread.java:5001)
01-30 10:38:43.351: E/AndroidRuntime(3097):     at java.lang.reflect.Method.invokeNative(Native Method)
01-30 10:38:43.351: E/AndroidRuntime(3097):     at java.lang.reflect.Method.invoke(Method.java:515)
01-30 10:38:43.351: E/AndroidRuntime(3097):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:785)
01-30 10:38:43.351: E/AndroidRuntime(3097):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:601)
01-30 10:38:43.351: E/AndroidRuntime(3097):     at dalvik.system.NativeStart.main(Native Method)
01-30 10:38:43.351: E/AndroidRuntime(3097): Caused by: java.lang.ClassCastException: android.widget.TextView cannot be cast to android.widget.Button
01-30 10:38:43.351: E/AndroidRuntime(3097):     at com.example.fourcommandmenu.InSituActivity.onCreate(InSituActivity.java:70)
01-30 10:38:43.351: E/AndroidRuntime(3097):     at android.app.Activity.performCreate(Activity.java:5231)
01-30 10:38:43.351: E/AndroidRuntime(3097):     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087)
01-30 10:38:43.351: E/AndroidRuntime(3097):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2148)
01-30 10:38:43.351: E/AndroidRuntime(3097):     ... 11 more

主要错误似乎是这样的：

01-30 10:38:43.351: E/AndroidRuntime(3097): Caused by: java.lang.ClassCastException: android.widget.TextView cannot be cast to android.widget.Button
01-30 10:38:43.351: E/AndroidRuntime(3097):     at com.example.fourcommandmenu.InSituActivity.onCreate(InSituActivity.java:70)

有问题的行onCreate()是这样的：

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_in_situ);
    freqIndxTextView = (TextView)findViewById(R.id.freqIndxTextView_id);
    gainLevelTextView = (TextView)findViewById(R.id.gainLevelTextView_id);
    freqIndxValTextView = (TextView)findViewById(R.id.freqIndxValTextView_id);
    gainLevelValTextView = (TextView)findViewById(R.id.gainLevelValTextView_id);
    bitPatternTextView = (TextView)findViewById(R.id.bitPatternTextView_id);
    bitPatternValTextView = (TextView)findViewById(R.id.bitPatternValTextView_id);
    freqIndxSeekBar = (SeekBar)findViewById(R.id.freqIndxSeekBar_id);
    gainLevelSeekBar = (SeekBar)findViewById(R.id.gainLevelSeekBar_id);
    btnInSituActivitySend = (Button)findViewById(R.id.btnInSituActivitySend_id);
    freqIndxValTextView.setText(Integer.toString(freqIndxSeekBar.getProgress()));
    gainLevelValTextView.setText(Integer.toString(gainLevelSeekBar.getProgress()));  
 .  
 .  
 .  

在行

btnInSituActivitySend = (Button)findViewById(R.id.btnInSituActivitySend_id);

btnInSituActivitySend被定义为，Button btnInSituActivitySend;并且btnInSituActivitySend_id在xml文件中被定义为

<Button
    android:id="@+id/btnInSituActivitySend_id"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:onClick="InSituActivitySend_click"
    android:text="@string/btnInSituActivitySend_string" />  

摘要：
我没有将TextView类型转换为按钮。那我为什么会收到这个错误？

编辑（适用于以后的Google伙伴）：
这似乎是一个非常普遍的问题，但由于错误描述的含糊性以及发现该问题并没有给出关于什么搜索的想法这一事实，很难找到解决方案在Google上使用的条款。解决的办法是清理项目。

Android.widget，textView无法转换为android.widget，button
android.widget.Button无法转换为android.widget.EditText
java.lang.ClassCastException：android.widget.TextView。我为什么得到这个？
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