Question

我编写了代码来获取加速度计返回的坐标，并在单击按钮时将其打印在TextViews上。但是，我只获得0.0作为所有标签上的值。我还在onSensorChange（）方法中添加了setText部分，以检查每次移动设备稍微动摇时值是否会改变。我也在Manifest中添加了必要的权限。请帮我完成这项工作。

代码：

package com.example.lol;

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.os.Bundle;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.TextView;

public class MainActivity extends Activity implements SensorEventListener{

    private SensorManager senSensorManager;
    private Sensor senAccelerometer;
    private long lastUpdate = 0;
    private float last_x, last_y, last_z;
    public float dummy_x, dummy_y,dummy_z;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        Button button1 = (Button)findViewById(R.id.button1);
        button1.setOnClickListener(onClickListener);

        senSensorManager = (SensorManager) getSystemService(Context.SENSOR_SERVICE);
        senAccelerometer = senSensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER);
        senSensorManager.registerListener(this, senAccelerometer , SensorManager.SENSOR_DELAY_NORMAL);
    }

    protected void onPause() {
        super.onPause();
        senSensorManager.unregisterListener(this);
    }
    protected void onResume() {
        super.onResume();
        senSensorManager.registerListener(this, senAccelerometer, SensorManager.SENSOR_DELAY_NORMAL);
    }

    public void onSensorChange(SensorEvent sensorEvent) {
        Sensor mySensor = sensorEvent.sensor;

        if (mySensor.getType() == Sensor.TYPE_ACCELEROMETER) {
            float x = sensorEvent.values[0];
            float y = sensorEvent.values[1];
            float z = sensorEvent.values[2];
            dummy_x=x;
            dummy_y=y;
            dummy_z=z;
            TextView textView1 = (TextView)findViewById(R.id.textView1);
            TextView textView2 = (TextView)findViewById(R.id.textView2);
            TextView textView3 = (TextView)findViewById(R.id.textView3);
            textView1.setText(Float.toString(x));
            textView2.setText(Float.toString(y));
            textView3.setText(Float.toString(z));
        }
    }

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

    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }

    private OnClickListener onClickListener = new OnClickListener() {
        @Override
        public void onClick(final View v) {
            switch(v.getId()){
                case R.id.button1:
                    TextView textView1 = (TextView)findViewById(R.id.textView1);
                    TextView textView2 = (TextView)findViewById(R.id.textView2);
                    TextView textView3 = (TextView)findViewById(R.id.textView3);
                    textView1.setText(Float.toString(dummy_x));
                    textView2.setText(Float.toString(dummy_y));
                    textView3.setText(Float.toString(dummy_z));
                break;
            }
        }
    };

    @Override
    public void onSensorChanged(SensorEvent event) {

    }

}

Answer 1

您有2个OnSensorChange函数。第一个包含所有TextView代码的内容不会覆盖任何内容。底部的那个（空）是值将来的那个。

Android加速度计返回0.0

1 个答案: