用Android stdio写一个程序，包含传感器及通知服务功能，写出Java代码和xml代码，及具体步骤，及具体步骤

好的，以下是具体步骤以及Java代码和xml代码。

步骤：

1. 创建一个Android Studio项目，选择Empty Activity模板。
2. 在AndroidManifest.xml文件中添加传感器和通知服务的权限声明。

<uses-permission android:name="android.permission.VIBRATE"/>
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>

3. 在activity_main.xml文件中添加一个TextView和一个Button。

<!-- activity_main.xml -->
<LinearLayout
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

    <TextView
        android:id="@+id/textView"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Shake your phone to trigger a notification"/>

    <Button
        android:id="@+id/button"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Stop"/>

</LinearLayout>

4. 在MainActivity.java文件中实现传感器和通知服务的功能。

// MainActivity.java
import androidx.appcompat.app.AppCompatActivity;

import android.app.NotificationChannel;
import android.app.NotificationManager;
import android.content.Context;
import android.content.Intent;
import android.hardware.Sensor;
import android.hardware.SensorEvent;
import android.hardware.SensorEventListener;
import android.hardware.SensorManager;
import android.os.Build;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity implements SensorEventListener {

    private SensorManager sensorManager;
    private Sensor sensor;
    private long lastUpdateTime = 0;
    private float lastX = 0, lastY = 0, lastZ = 0;
    private static final float SHAKE_THRESHOLD = 800;
    private boolean isShakeDetected = false;

    private NotificationManager notificationManager;
    private static final String CHANNEL_ID = "channel_id";
    private static final String CHANNEL_NAME = "channel_name";
    private static final String CHANNEL_DESC = "channel_desc";

    private TextView textView;
    private Button button;

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

        // 初始化传感器
        sensorManager = (SensorManager) getSystemService(Context.SENSOR_SERVICE);
        sensor = sensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER);

        // 初始化通知服务
        createNotificationChannel();

        // 初始化UI组件
        textView = findViewById(R.id.textView);
        button = findViewById(R.id.button);
        button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                stopShakeDetection();
            }
        });
    }

    @Override
    protected void onResume() {
        super.onResume();
        sensorManager.registerListener(this, sensor, SensorManager.SENSOR_DELAY_NORMAL);
    }

    @Override
    protected void onPause() {
        super.onPause();
        sensorManager.unregisterListener(this);
    }

    @Override
    public void onSensorChanged(SensorEvent sensorEvent) {
        // 计算加速度变化
        long currentTime = System.currentTimeMillis();
        long timeDifference = currentTime - lastUpdateTime;
        if (timeDifference > 0) {
            float x = sensorEvent.values[0];
            float y = sensorEvent.values[1];
            float z = sensorEvent.values[2];
            float speed = Math.abs(x + y + z - lastX - lastY - lastZ) / timeDifference * 10000;

            // 判断是否达到摇晃阈值
            if (speed > SHAKE_THRESHOLD) {
                if (!isShakeDetected) {
                    isShakeDetected = true;
                    showNotification();
                }
            } else {
                isShakeDetected = false;
            }

            lastUpdateTime = currentTime;
            lastX = x;
            lastY = y;
            lastZ = z;
        }
    }

    @Override
    public void onAccuracyChanged(Sensor sensor, int i) {

    }

    private void createNotificationChannel() {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
            NotificationChannel channel = new NotificationChannel(CHANNEL_ID, CHANNEL_NAME, NotificationManager.IMPORTANCE_DEFAULT);
            channel.setDescription(CHANNEL_DESC);
            notificationManager = getSystemService(NotificationManager.class);
            notificationManager.createNotificationChannel(channel);
        }
    }

    private void showNotification() {
        Toast.makeText(this, "Shake detected!", Toast.LENGTH_SHORT).show();

        Intent intent = new Intent(this, MainActivity.class);
        intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TASK);
        android.app.PendingIntent pendingIntent = android.app.PendingIntent.getActivity(this, 0, intent, 0);

        android.app.NotificationCompat.Builder builder = new android.app.NotificationCompat.Builder(this, CHANNEL_ID)
                .setSmallIcon(R.drawable.ic_launcher_foreground)
                .setContentTitle("Shake detected!")
                .setContentText("Shake your phone again to trigger another notification.")
                .setPriority(android.app.NotificationCompat.PRIORITY_DEFAULT)
                .setContentIntent(pendingIntent)
                .setAutoCancel(true);
        notificationManager.notify(0, builder.build());
    }

    private void stopShakeDetection() {
        isShakeDetected = false;
        notificationManager.cancelAll();
    }
}

这个程序会监听加速度传感器，在检测到摇晃时触发一个通知，并在用户点击通知时打开应用程序。用户也可以点击按钮停止摇晃检测并取消所有通知。