将文本设置为整数值

Question

我想将a设置TextView为整数的值,希望如此:

tv.setText(int)

我试过这个,我得到了这个错误.

另外,我的整数值在另一个类中

D/AndroidRuntime: Shutting down VM
E/AndroidRuntime: FATAL EXCEPTION: main
  Process: com.example.application, PID: 29603
  java.lang.IllegalStateException: Could not execute method for android:onClick
      at android.support.v7.app.AppCompatViewInflater$DeclaredOnClickListener.onClick(AppCompatViewInflater.java:293)
      at android.view.View.performClick(View.java:5207)
      at android.view.View$PerformClick.run(View.java:21168)
      at android.os.Handler.handleCallback(Handler.java:746)
      at android.os.Handler.dispatchMessage(Handler.java:95)
      at android.os.Looper.loop(Looper.java:148)
      at android.app.ActivityThread.main(ActivityThread.java:5443)
      at java.lang.reflect.Method.invoke(Native Method)
      at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:728)
      at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618)
   Caused by: java.lang.reflect.InvocationTargetException
      at java.lang.reflect.Method.invoke(Native Method)
      at android.support.v7.app.AppCompatViewInflater$DeclaredOnClickListener.onClick(AppCompatViewInflater.java:288)
      at android.view.View.performClick(View.java:5207) 
      at android.view.View$PerformClick.run(View.java:21168) 
      at android.os.Handler.handleCallback(Handler.java:746) 
      at android.os.Handler.dispatchMessage(Handler.java:95) 
      at android.os.Looper.loop(Looper.java:148) 
      at android.app.ActivityThread.main(ActivityThread.java:5443) 
      at java.lang.reflect.Method.invoke(Native Method) 
      at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:728) 
      at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618) 
   Caused by: android.content.res.Resources$NotFoundException: String resource ID #0x1
      at android.content.res.Resources.getText(Resources.java:312)
      at android.widget.TextView.setText(TextView.java:4427)

Answer 1

通常,

tv.setText(String.valueOf(int));

如果值在另一个类中？您可以为该类中所需的值创建一个getter:

public int getValue() {
    return value;
}

这样你就可以从另一个访问它了:

但是如果将TextView设置为int,则会将其解释为Android 资源ID.如果您希望int的值作为您的文本(而不是它指向的资源),请首先将其设为String.

tv.setText(String.valueOf(theOtherClassInstance.getValue()));

编辑如果您的int firstResult符合下面的评论,则getter将变为:

public int getFirstResult() {
    return firstResult;
}

Answer 2

执行setText(int)是指从XML文件中引用应用程序资源,而不是值本身.

要设置属性属性,请执行以下操作:

tv.setText(""+integer);

或更好的解决方案

tv.setText(String.valueOf(integer));