【传感器】重力感应X轴 Y轴 Z轴 --- SensorManager

效果图：

 

切图：

 

编码：

main.xml

View Code

<?xml version="1.0" encoding="utf-8"?>
<ScrollView xmlns:android="http://schemas.android.com/apk/res/android" 
    android:id="@+id/screen"
    android:layout_width="fill_parent" 
    android:layout_height="fill_parent"
    android:orientation="vertical">
    <LinearLayout
        android:layout_width="fill_parent" 
        android:layout_height="fill_parent"
        android:orientation="vertical">
        <ImageView
         android:src="@drawable/jay"
         android:layout_width="fill_parent" 
         android:layout_height="fill_parent" />
    
    </LinearLayout>
</ScrollView>

SurfaceViewAcitvity.java

View Code

package cn.m15.xys;

import android.app.Activity;
import android.content.Context;
import android.content.pm.ActivityInfo;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.hardware.Sensor;
import android.hardware.SensorEvent;
import android.hardware.SensorEventListener;
import android.hardware.SensorManager;
import android.os.Bundle;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.view.Window;
import android.view.WindowManager;
import android.view.SurfaceHolder.Callback;

public class SurfaceViewAcitvity extends Activity {

    MyView mAnimView = null;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        // 全屏显示窗口
        requestWindowFeature(Window.FEATURE_NO_TITLE);
        getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
                WindowManager.LayoutParams.FLAG_FULLSCREEN);
        // 强制横屏
        setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);

        // 显示自定义的游戏View
        mAnimView = new MyView(this);
        setContentView(mAnimView);
    }

    public class MyView extends SurfaceView implements Callback, Runnable,
            SensorEventListener {

        /** 每10帧刷新一次屏幕 **/
        public static final int TIME_IN_FRAME = 10;

        /** 游戏画笔 **/
        Paint mPaint = null;
        Paint mTextPaint = null;
        SurfaceHolder mSurfaceHolder = null;

        /** 控制游戏更新循环 **/
        boolean mRunning = false;

        /** 游戏画布 **/
        Canvas mCanvas = null;

        /** 控制游戏循环 **/
        boolean mIsRunning = false;

        /** SensorManager管理器 **/
        private SensorManager mSensorMgr = null;
        Sensor mSensor = null;

        /** 手机屏幕宽高 **/
        int mScreenWidth = 0;
        int mScreenHeight = 0;

        /** 小球资源文件越界区域 **/
        private int mScreenBallWidth = 0;
        private int mScreenBallHeight = 0;

        /** 游戏背景文件 **/
        private Bitmap mbitmapBg;

        /** 小球资源文件 **/
        private Bitmap mbitmapBall;

        /** 小球的坐标位置 **/
        private float mPosX = 200;
        private float mPosY = 0;

        /** 重力感应X轴 Y轴 Z轴的重力值 **/
        private float mGX = 0;
        private float mGY = 0;
        private float mGZ = 0;

        public MyView(Context context) {
            super(context);
            /** 设置当前View拥有控制焦点 **/
            this.setFocusable(true);
            /** 设置当前View拥有触摸事件 **/
            this.setFocusableInTouchMode(true);
            /** 拿到SurfaceHolder对象 **/
            mSurfaceHolder = this.getHolder();
            /** 将mSurfaceHolder添加到Callback回调函数中 **/
            mSurfaceHolder.addCallback(this);
            /** 创建画布 **/
            mCanvas = new Canvas();
            /** 创建曲线画笔 **/
            mPaint = new Paint();
            mPaint.setColor(Color.WHITE);
            /** 加载小球资源 **/
            mbitmapBall = BitmapFactory.decodeResource(this.getResources(),
                    R.drawable.ball);
            /** 加载游戏背景 **/
            mbitmapBg = BitmapFactory.decodeResource(this.getResources(),
                    R.drawable.bg);

            /** 得到SensorManager对象 **/
            mSensorMgr = (SensorManager) getSystemService(SENSOR_SERVICE);
            mSensor = mSensorMgr.getDefaultSensor(Sensor.TYPE_ACCELEROMETER);
            // 注册listener，第三个参数是检测的精确度
            // SENSOR_DELAY_FASTEST 最灵敏 因为太快了没必要使用
            // SENSOR_DELAY_GAME 游戏开发中使用
            // SENSOR_DELAY_NORMAL 正常速度
            // SENSOR_DELAY_UI 最慢的速度
            mSensorMgr.registerListener(this, mSensor,
                    SensorManager.SENSOR_DELAY_GAME);
        }

        private void Draw() {
            /** 绘制游戏背景 **/
            mCanvas.drawBitmap(mbitmapBg, 0, 0, mPaint);
            /** 绘制小球 **/
            mCanvas.drawBitmap(mbitmapBall, mPosX, mPosY, mPaint);
            /** X轴 Y轴 Z轴的重力值 **/
            mCanvas.drawText("X轴重力值 ：" + mGX, 0, 20, mPaint);
            mCanvas.drawText("Y轴重力值 ：" + mGY, 0, 40, mPaint);
            mCanvas.drawText("Z轴重力值 ：" + mGZ, 0, 60, mPaint);
        }

        @Override
        public void surfaceChanged(SurfaceHolder holder, int format, int width,
                int height) {

        }

        @Override
        public void surfaceCreated(SurfaceHolder holder) {
            /** 开始游戏主循环线程 **/
            mIsRunning = true;
            new Thread(this).start();
            /** 得到当前屏幕宽高 **/
            mScreenWidth = this.getWidth();
            mScreenHeight = this.getHeight();

            /** 得到小球越界区域 **/
            mScreenBallWidth = mScreenWidth - mbitmapBall.getWidth();
            mScreenBallHeight = mScreenHeight - mbitmapBall.getHeight();
        }

        @Override
        public void surfaceDestroyed(SurfaceHolder holder) {
            mIsRunning = false;
        }

        @Override
        public void run() {
            while (mIsRunning) {
                /** 取得更新游戏之前的时间 **/
                long startTime = System.currentTimeMillis();
                /** 在这里加上线程安全锁 **/
                synchronized (mSurfaceHolder) {
                    /** 拿到当前画布 然后锁定 **/
                    mCanvas = mSurfaceHolder.lockCanvas();
                    Draw();
                    /** 绘制结束后解锁显示在屏幕上 **/
                    mSurfaceHolder.unlockCanvasAndPost(mCanvas);
                }

                /** 取得更新游戏结束的时间 **/
                long endTime = System.currentTimeMillis();

                /** 计算出游戏一次更新的毫秒数 **/
                int diffTime = (int) (endTime - startTime);

                /** 确保每次更新时间为50帧 **/
                while (diffTime <= TIME_IN_FRAME) {
                    diffTime = (int) (System.currentTimeMillis() - startTime);
                    /** 线程等待 **/
                    Thread.yield();
                }

            }

        }

        @Override
        public void onAccuracyChanged(Sensor arg0, int arg1) {
            // TODO Auto-generated method stub

        }

        @Override
        public void onSensorChanged(SensorEvent event) {
            mGX = event.values[SensorManager.DATA_X];
            mGY = event.values[SensorManager.DATA_Y];
            mGZ = event.values[SensorManager.DATA_Z];

            // 这里乘以2是为了让小球移动的更快
            mPosX -= mGX * 2;
            mPosY += mGY * 2;

            // 检测小球是否超出边界
            if (mPosX < 0) {
                mPosX = 0;
            } else if (mPosX > mScreenBallWidth) {
                mPosX = mScreenBallWidth;
            }
            if (mPosY < 0) {
                mPosY = 0;
            } else if (mPosY > mScreenBallHeight) {
                mPosY = mScreenBallHeight;
            }
        }
    }
}

 配置文件

View Code

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
      package="cn.m15.xys"
      android:versionCode="1"
      android:versionName="1.0">
    <application android:icon="@drawable/icon" android:label="@string/app_name">
        
        <activity android:name=".SurfaceViewAcitvity"
                    android:configChanges="orientation|keyboardHidden"
                  android:label="@string/app_name">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        
    </application>
</manifest>