java - EditText 错误不起作用

Question

如果 EditText 中的文本不等于“1”，我会尝试显示 EditText 错误。当我输入“1”以外的任何文本时，不会出现错误!这是源代码:

import android.app.Activity;
import android.os.Bundle;
import android.view.KeyEvent;
import android.view.Menu;
import android.view.inputmethod.EditorInfo;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.TextView.OnEditorActionListener;
import android.widget.Toast;

 public class MainActivity extends Activity {

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    final EditText editText = (EditText) findViewById(R.id.edit);

    editText.setOnEditorActionListener(new OnEditorActionListener() {

        @Override
        public boolean onEditorAction(TextView v, int actionId, KeyEvent event) {
            if (actionId==EditorInfo.IME_ACTION_NEXT) {
                if(editText.getText().toString() != "1") {
                    editText.setError("Please enter some information!");
                }
                else {
                    Toast.makeText(getApplicationContext(), "Not null", Toast.LENGTH_SHORT).show();
                }
            }
            return false;
        }
    });
}
}

XML 代码:

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context=".MainActivity" >

<EditText
    android:id="@+id/edit"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content" />

我究竟做错了什么？任何帮助将不胜感激!

Answer 1

这就是错误:

editText.getText().toString() != "1"

你需要做:

!(editText.getText().toString().equals("1"));