2 o19830015 o19830015 于 2012.11.28 17:03 提问

从EditText中获取单个字符
String PT = pt.getText().toString(); 
int len = PT.length(); 
char chars[] = PT.toCharArray(); 
for(int i=0;i<len;i++)
{ Toast.makeText(encrypt.this,chars[i], 0).show(); }

这段代码是用在EditText中读取字符串,获取单个字符的。但是结果出了一个logcat错误信息:

11-28 12:41:01.228: E/AndroidRuntime(1632):     at android.app.ActivityThread.main(ActivityThread.java:3683)
11-28 12:41:01.228: E/AndroidRuntime(1632):     at java.lang.reflect.Method.invokeNative(Native Method)
11-28 12:41:01.228: E/AndroidRuntime(1632):     at java.lang.reflect.Method.invoke(Method.java:507)
11-28 12:41:01.228: E/AndroidRuntime(1632):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
11-28 12:41:01.228: E/AndroidRuntime(1632):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
11-28 12:41:01.228: E/AndroidRuntime(1632):     at dalvik.system.NativeStart.main(Native Method)
11-28 12:46:43.688: W/KeyCharacterMap(1674): No keyboard for id 0
11-28 12:46:43.688: W/KeyCharacterMap(1674): Using default keymap: /system/usr/keychars/qwerty.kcm.bin
11-28 12:46:54.442: W/ResourceType(1674): No package identifier when getting value for resource number 0x00000061
11-28 12:46:54.448: D/AndroidRuntime(1674): Shutting down VM
11-28 12:46:54.448: W/dalvikvm(1674): threadid=1: thread exiting with uncaught exception (group=0x40015560)
11-28 12:46:54.459: E/AndroidRuntime(1674): FATAL EXCEPTION: main
11-28 12:46:54.459: E/AndroidRuntime(1674): android.content.res.Resources$NotFoundException: String resource ID #0x61
11-28 12:46:54.459: E/AndroidRuntime(1674):     at android.content.res.Resources.getText(Resources.java:201)
11-28 12:46:54.459: E/AndroidRuntime(1674):     at android.widget.Toast.makeText(Toast.java:258)
11-28 12:46:54.459: E/AndroidRuntime(1674):     at com.project.DENCrypt.encrypt$1.onClick(encrypt.java:33)
11-28 12:46:54.459: E/AndroidRuntime(1674):     at android.view.View.performClick(View.java:2485)
11-28 12:46:54.459: E/AndroidRuntime(1674):     at android.view.View$PerformClick.run(View.java:9080)
11-28 12:46:54.459: E/AndroidRuntime(1674):     at android.os.Handler.handleCallback(Handler.java:587)
11-28 12:46:54.459: E/AndroidRuntime(1674):     at android.os.Handler.dispatchMessage(Handler.java:92)
11-28 12:46:54.459: E/AndroidRuntime(1674):     at android.os.Looper.loop(Looper.java:123)
11-28 12:46:54.459: E/AndroidRuntime(1674):     at android.app.ActivityThread.main(ActivityThread.java:3683)
11-28 12:46:54.459: E/AndroidRuntime(1674):     at java.lang.reflect.Method.invokeNative(Native Method)
11-28 12:46:54.459: E/AndroidRuntime(1674):     at java.lang.reflect.Method.invoke(Method.java:507)
11-28 12:46:54.459: E/AndroidRuntime(1674):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
11-28 12:46:54.459: E/AndroidRuntime(1674):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
11-28 12:46:54.459: E/AndroidRuntime(1674):     at dalvik.system.NativeStart.main(Native Method)

2个回答

cytown
cytown   2012.11.29 15:15
已采纳
Toast.makeText(encrypt.this,chars[i] + "", 0).show();

原错误在于char会转换成int导致寻找int对应的resource。

allwefantasy
allwefantasy 回答完全正确。
大约 5 年之前 回复
suannai0314
suannai0314 代码部分可以用code sample,刚帮你编辑了一下,你也可以自己试试这个功能~
大约 5 年之前 回复
mistbow
mistbow   2012.11.29 16:03
Toast.makeText(encrypt.this,chars[i] + "", 0).show();

makeText第二个参数可以是int类型的,和CharSequence类型的。char转型成int了,所以像cytown所的,会去找资源。

如果写成chars[i]+""。转型成string类型的了。直接显示字符串内容。最后一个参数是持续时间。

ps:

public final class String implements Serializable, Comparable<String>, CharSequence
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