de la classe ou de l'interface attendue

J'ai l'habitude d'utiliser eclipse avec le kit sdk d'android, mais je viens de télécharger android studio. Je voulais l'utilisation de l'accéléromètre, mais pour une raison que je reçois le même problème."De la classe ou de l'Interface attendue" je joins le code ci-dessous,si quelqu'un peut me donner une solution pour le problème, je vais être obligé.

   package com.example.symbox.myapplication;
import android.app.Activity;
import android.content.Context;
import android.hardware.Sensor;
import android.hardware.SensorEvent;
import android.hardware.SensorEventListener;
import android.hardware.SensorManager;
import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.ImageView;
import android.widget.TextView;
public class MainActivity extends ActionBarActivity implements SensorEventListener {
private float mLastX, mLastY, mLastZ;
private boolean mInitialized;
private SensorManager mSensorManager;
private Sensor mAccelerometer;
private final float NOISE = (float) 2.0;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mInitialized = false;
mSensorManager = (SensorManager) getSystemService(Context.SEARCH_SERVICE);
mAccelerometer = mSensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER);
mSensorManager.registerListener(this, mAccelerometer, SensorManager.SENSOR_DELAY_NORMAL);
}
}
protected void onResume(){
super.onResume();
mSensorManager.registerListener(this,mAccelerometer,SensorManager.SENSOR_DELAY_NORMAL);
}
protected void onPause(){
super.onPause();
mSensorManager.unregisterListener(this);
}
public void onAccuracyChanged(Sensor sensor,int accuracy){
}
public void onSensorChanged(SensorEvent event){
TextView tvX= (TextView)findViewById(R.id.x_axis);
TextView tvY= (TextView)findViewById(R.id.y_axis);
TextView tvZ= (TextView)findViewById(R.id.z_axis);
ImageView iv = (ImageView)findViewById(R.id.image);
float x = event.values[0];
float y = event.values[1];
float z = event.values[2];
if(!mInitialized){
mLastX = x;
mLastY = y;
mLastZ = z ;
tvX.setText("0.0");
tvY.setText("0.0");
tvZ.setText("0.0");
mInitialized = true;
} else {
float deltaX = Math.abs(mLastX - x);
float deltaY = Math.abs(mLastY - y);
float deltaZ = Math.abs(mLastZ - z);
if (deltaX < NOISE) deltaX = (float)0.0;
if (deltaY < NOISE) deltaY = (float)0.0;
if (deltaZ < NOISE) deltaZ = (float)0.0;
mLastX = x;
mLastY = y;
mLastZ = z;
tvX.setText(Float.toString(deltaX));
tvY.setText(Float.toString(deltaY));
tvZ.setText(Float.toString(deltaZ));
iv.setVisibility(View.VISIBLE);
if (deltaX > deltaY) {
iv.setImageResource(R.drawable.horizontal);
} else if (deltaY > deltaX) {
iv.setImageResource(R.drawable.vertical);
} else {
iv.setVisibility(View.INVISIBLE);
}
}
}
@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);
}
}

Ce sont les journaux que je continue à voir en raison de l'erreur "de la Classe ou de l'Interface attendue"

C:\Users\Abeer\AndroidStudioProjects\test_one\app\src\main\java\com\example\symbox\test_one\MainActivity.java:38: error: class, interface, or enum expected
public boolean onCreateOptionsMenu(Menu menu) {
^
C:\Users\Abeer\AndroidStudioProjects\test_one\app\src\main\java\com\example\symbox\test_one\MainActivity.java:41: error: class, interface, or enum expected
return true;
^
C:\Users\Abeer\AndroidStudioProjects\test_one\app\src\main\java\com\example\symbox\test_one\MainActivity.java:42: error: class, interface, or enum expected
}
^
C:\Users\Abeer\AndroidStudioProjects\test_one\app\src\main\java\com\example\symbox\test_one\MainActivity.java:45: error: class, interface, or enum expected
public boolean onOptionsItemSelected(MenuItem item) {
^
C:\Users\Abeer\AndroidStudioProjects\test_one\app\src\main\java\com\example\symbox\test_one\MainActivity.java:52: error: class, interface, or enum expected
if (id == R.id.action_settings) {
^
C:\Users\Abeer\AndroidStudioProjects\test_one\app\src\main\java\com\example\symbox\test_one\MainActivity.java:54: error: class, interface, or enum expected
}
^
C:\Users\Abeer\AndroidStudioProjects\test_one\app\src\main\java\com\example\symbox\test_one\MainActivity.java:57: error: class, interface, or enum expected
}
^
C:\Users\Abeer\AndroidStudioProjects\test_one\app\src\main\java\com\example\symbox\test_one\MainActivity.java:60: error: class, interface, or enum expected
public void onSensorChanged(SensorEvent event) {
^
C:\Users\Abeer\AndroidStudioProjects\test_one\app\src\main\java\com\example\symbox\test_one\MainActivity.java:65: error: class, interface, or enum expected
public void onAccuracyChanged(Sensor sensor, int accuracy) {

OriginalL'auteur safiulm | 2015-03-11