Android从编辑文本中获取int？

Question

我试图从编辑文本集中获取一个int到inputType ="number"然后输出它(我稍后会用它做一些事情)我不能这样做,这是我有的代码,我被告知尝试但它不起作用

Button go;
EditText num;
TextView OP, ST;
String OPS;
int oer;

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);
    initalize();
    go.setOnClickListener(new View.OnClickListener() {

        public void onClick(View v) {

            int myNum = 0;

            OPS = num.getText().toString();

            try {
                myNum = Integer.parseInt(OPS);
            } catch(NumberFormatException nfe) {
                System.out.println("Could not parse " + nfe);
            }
            OP.setText(myNum);
        }

在我运行之后它强行关闭.这是LOG CAT:

09-09 16:53:00.400: W/ResourceType(20145): No package identifier when getting value for resource number 0x00000008
09-09 16:53:00.400: D/AndroidRuntime(20145): Shutting down VM
09-09 16:53:00.400: W/dalvikvm(20145): threadid=1: thread exiting with uncaught exception (group=0x40a411f8)
09-09 16:53:00.561: E/AndroidRuntime(20145): FATAL EXCEPTION: main
09-09 16:53:00.561: E/AndroidRuntime(20145): android.content.res.Resources$NotFoundException: String resource ID #0x8
09-09 16:53:00.561: E/AndroidRuntime(20145):    at android.content.res.Resources.getText(Resources.java:248)
09-09 16:53:00.561: E/AndroidRuntime(20145):    at android.widget.TextView.setText(TextView.java:3473)
09-09 16:53:00.561: E/AndroidRuntime(20145):    at com.Nutty.studios.randnumgen.free.RandomNumberGenActivity$1.onClick(RandomNumberGenActivity.java:42)
09-09 16:53:00.561: E/AndroidRuntime(20145):    at android.view.View.performClick(View.java:3511)
09-09 16:53:00.561: E/AndroidRuntime(20145):    at android.view.View$PerformClick.run(View.java:14105)
09-09 16:53:00.561: E/AndroidRuntime(20145):    at android.os.Handler.handleCallback(Handler.java:605)
09-09 16:53:00.561: E/AndroidRuntime(20145):    at android.os.Handler.dispatchMessage(Handler.java:92)
09-09 16:53:00.561: E/AndroidRuntime(20145):    at android.os.Looper.loop(Looper.java:137)
09-09 16:53:00.561: E/AndroidRuntime(20145):    at android.app.ActivityThread.main(ActivityThread.java:4575)
09-09 16:53:00.561: E/AndroidRuntime(20145):    at java.lang.reflect.Method.invokeNative(Native Method)
09-09 16:53:00.561: E/AndroidRuntime(20145):    at java.lang.reflect.Method.invoke(Method.java:511)
09-09 16:53:00.561: E/AndroidRuntime(20145):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:789)
09-09 16:53:00.561: E/AndroidRuntime(20145):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:556)
09-09 16:53:00.561: E/AndroidRuntime(20145):    at dalvik.system.NativeStart.main(Native Method)

如果我尝试输出字符串而不是整数,它工作正常吗？

Answer 1

1.您永远不会 int从EditText 获得,InputType提供正确的softKeyboard ...

2.您可以使用此方法将 EditText中的文本转换为整数.

int i = Integer.parseInt(editText.getText().toString());

此外,setText你会期望你提供String....所以你需要这样做......

OP.setText(myNum+"");

toString()只适用于Object类型,并且如您所声明的myNum那样int,这是一种原始类型 ....您需要使用+ ""