我在android平台上做了一个平方根计算器。我在我的应用程序中添加了不同的语言，我的问题从这里开始。
在具有不同符号的语言中，例如中文，我可以打印符号。但是当我触摸计算按钮时，应用程序关闭。我认为问题始于 native 符号计算。
部分代码
Double result;
textview show_result
result = Math.sqrt(Double.parseDouble(process.getText().toString()));
show_result.setText(result.toString());
Logcat
10-29 03:26:34.946 11031-11031/ahmetgoksu.com.squareroot E/AndroidRuntime: FATAL EXCEPTION: main
10-29 03:26:34.946 11031-11031/ahmetgoksu.com.squareroot E/AndroidRuntime: Process: ahmetgoksu.com.squareroot, PID: 11031
10-29 03:26:34.946 11031-11031/ahmetgoksu.com.squareroot E/AndroidRuntime: java.lang.NumberFormatException: Invalid double: "١"
10-29 03:26:34.946 11031-11031/ahmetgoksu.com.squareroot E/AndroidRuntime: at java.lang.StringToReal.invalidReal(StringToReal.java:63)
10-29 03:26:34.946 11031-11031/ahmetgoksu.com.squareroot E/AndroidRuntime: at java.lang.StringToReal.parseDouble(StringToReal.java:269)
10-29 03:26:34.946 11031-11031/ahmetgoksu.com.squareroot E/AndroidRuntime: at java.lang.Double.parseDouble(Double.java:295)
10-29 03:26:34.946 11031-11031/ahmetgoksu.com.squareroot E/AndroidRuntime: at ahmetgoksu.com.squareroot.SquareRootSecondPage$1.onClick(SquareRootSecondPage.java:66)
10-29 03:26:34.946 11031-11031/ahmetgoksu.com.squareroot E/AndroidRuntime: at android.view.View.performClick(View.java:4438)
10-29 03:26:34.946 11031-11031/ahmetgoksu.com.squareroot E/AndroidRuntime: at android.view.View$PerformClick.run(View.java:18422)
10-29 03:26:34.946 11031-11031/ahmetgoksu.com.squareroot E/AndroidRuntime: at android.os.Handler.handleCallback(Handler.java:733)
10-29 03:26:34.946 11031-11031/ahmetgoksu.com.squareroot E/AndroidRuntime: at android.os.Handler.dispatchMessage(Handler.java:95)
10-29 03:26:34.946 11031-11031/ahmetgoksu.com.squareroot E/AndroidRuntime: at android.os.Looper.loop(Looper.java:136)
10-29 03:26:34.946 11031-11031/ahmetgoksu.com.squareroot E/AndroidRuntime: at android.app.ActivityThread.main(ActivityThread.java:5001)
10-29 03:26:34.946 11031-11031/ahmetgoksu.com.squareroot E/AndroidRuntime: at java.lang.reflect.Method.invokeNative(Native Method)
10-29 03:26:34.946 11031-11031/ahmetgoksu.com.squareroot E/AndroidRuntime: at java.lang.reflect.Method.invoke(Method.java:515)
10-29 03:26:34.946 11031-11031/ahmetgoksu.com.squareroot E/AndroidRuntime: at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:785)
10-29 03:26:34.946 11031-11031/ahmetgoksu.com.squareroot E/AndroidRuntime: at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:601)
10-29 03:26:34.946 11031-11031/ahmetgoksu.com.squareroot E/AndroidRuntime: at dalvik.system.NativeStart.main(Native Method)
10-29 03:26:34.950 705-865/system_process D/: HostConnection::get() New Host Connection established 0xb840c870, did 865
最佳答案
Double.Parse 不适用于 native 语言，因为通过检查字符串中的每个字符是否包含“0”、“1”、“2”字符，将字符串解析为 double 。
你必须自己解析它，计算并解析回 native 并打印
关于java - 如何在 Android 应用程序上打印 native 符号？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/33408279/