Android 无法在模拟器中运行
我是一个新的android开发者,我不知道是什么问题。请帮助Android 无法在模拟器中运行,android,android-emulator,Android,Android Emulator,我是一个新的android开发者,我不知道是什么问题。请帮助 public class MainActivity extends Activity { private EditText studentid, password; private ImageView login, reset; @Override protected void onCreate(Bundle savedInstanceState) { studentid = (E
public class MainActivity extends Activity {
private EditText studentid, password;
private ImageView login, reset;
@Override
protected void onCreate(Bundle savedInstanceState) {
studentid = (EditText) findViewById(R.id.studentid);
password = (EditText) findViewById(R.id.password);
login = (ImageView) findViewById(R.id.login);
login.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
String un = studentid.getText().toString();
String pw = password.getText().toString();
String setun = "s123";
String setpw = "456";
if (un.equals(setun) && pw.equals(setpw)) {
loginsuccess();
} else {
studentid.setText("");
password.setText("");
Toast toast = Toast.makeText(v.getContext(),
"Wrong username or password...", Toast.LENGTH_LONG);
toast.show();
}
}
});
}
private void loginsuccess() {
Intent intent = new Intent(MainActivity.this, edit.class);
startActivity(intent);
}
}
它无法在emulator中运行。您缺少
setContentView(R.layout.your\u layout)
在studentid=(EditText)findViewById(R.id.studentid)之前添加上一行代码>
应该是这样的
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.your_layout); // this line is missing
studentid = (EditText) findViewById(R.id.studentid);
您缺少setContentView(R.layout.your\u布局)
在studentid=(EditText)findViewById(R.id.studentid)之前添加上一行代码>
应该是这样的
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.your_layout); // this line is missing
studentid = (EditText) findViewById(R.id.studentid);
是否设置了仿真器?是否设置了仿真器?java.lang.RuntimeException:无法启动活动组件信息{com.example.slp/com.example.slp.MainActivity}:android.view.Inflate异常:二进制XML文件行#1:错误膨胀类发布有问题的完整logcat错误,而不仅仅是单行。并指出显示error.java.lang.RuntimeException:无法启动activity ComponentInfo{com.example.slp/com.example.slp.MainActivity}:android.view.Inflate Exception:二进制XML文件行#1:错误膨胀类发布有关的完整logcat错误,而不仅仅是单行。并指出显示错误的线条。