我想检查密码,并且在Android中有一个密码字段
package com.example.berk4;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.app.Activity;
import android.app.AlertDialog;
import android.content.Intent;
public class MainActivity extends Activity implements OnClickListener{
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
EditText et = (EditText)findViewById(R.id.editText1);
Button buttonEnter = (Button)findViewById(R.id.button1);
buttonEnter.setOnClickListener(this);
}
@Override
public void onClick(View v) {
EditText et = (EditText)findViewById(R.id.editText1);
String password = et.getText().toString();
et.getEditableText().toString();
if (password.equals("admin")) {
Intent intent2 = new Intent("com.example.berk4.screen2");
startActivity(intent2);
}else{
AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setTitle("you suck");
builder.setMessage("try again");
builder.setPositiveButton("ok", null);
AlertDialog dialog = builder.show();
}
}
}
当我输入随机的错误密码时,它可以正常工作,但是当我输入正确的密码时,应用程序将关闭,为什么它对我不起作用? (顺便说一句,我还有另一个班级屏幕2.)
解决方法:
好像密码正确一样开始新活动:
if (password.equals("admin")) {
Intent intent2 = new Intent(MainActivity.this,screen2.class);
startActivity(intent2);
}else{
// your code here
}
并确保已将您的“下一个活动”添加到AndroidManifest.xml中,如下所示:
.....
<activity android:name=".screen2"></activity>
</application>
.....