Im新的Android Studio和Android開發。所以我按照developer.android.com給出的教程,我在這一行中有一個錯誤:EditText editText = (EditText) findViewById(R.id.editText);
錯誤是說:找不到符號變量editText。Android Studio:R.id.editText中的錯誤
這是我的整個代碼:import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.EditText;
import android.content.Intent;
public class MainActivity extends AppCompatActivity {
public static final String EXTRA_MESSAGE = "com.example.lunatello.bdsapp.MESSAGE";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_main, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
public void sendMessage(View view){
Intent intent = new Intent(this, DisplayMessageActivity.class);
EditText editText = (EditText) findViewById(R.id.editText);
String message = editText.getText().toString();
intent.putExtra(EXTRA_MESSAGE, message);
startActivity(intent);
}
}
'editText'不是一部分'activity_main' –
請複製完整的編譯器錯誤消息問題 – TmTron
添加你的xml文件 –