优化产品使用体验记录二

Q：Android上面比较好的摇一摇

A：来源于开源社区，在比较多的Android品牌手机上测试效果好

    private float lastX;
    private float lastY;
    private float lastZ;
    private long lastUpdateTime;
    private static final int SPEED_SHRESHOLD = 45;// 这个值越大需要越大的力气来摇晃手机
    private static final int UPTATE_INTERVAL_TIME = 50;


    @Override
    public void onSensorChanged(SensorEvent event) {
        long currentUpdateTime = System.currentTimeMillis();
        long timeInterval = currentUpdateTime - lastUpdateTime;
        if (timeInterval < UPTATE_INTERVAL_TIME) {
            return;
        }
        lastUpdateTime = currentUpdateTime;

        float x = event.values[0];
        float y = event.values[1];
        float z = event.values[2];

        float deltaX = x - lastX;
        float deltaY = y - lastY;
        float deltaZ = z - lastZ;

        lastX = x;
        lastY = y;
        lastZ = z;

        double speed = (Math.sqrt(deltaX * deltaX + deltaY * deltaY + deltaZ
                * deltaZ) / timeInterval) * 100;
        if (speed >= SPEED_SHRESHOLD && !isRequest) {
            mLayoutBottom.setVisibility(View.GONE);
            vibrator.vibrate(300);
            onShake();
        }
    }

 

 在接口中的方法，添加修饰语“public”是多余的

Q：使用Android Studio打包APK

A：http://blog.csdn.net/sunylat/article/details/9239595，打包时碰到如下问题时Error:Execution failed for task ':app:proguardRelease'. 解决办法：http://stackoverflow.com/questions/27506488/android-execution-failed-for-task-appproguardrelease/27575378；

打包时有如下错误时：Error:(5) Error: "xxx" is not translated in "xxx"  [MissingTranslation]，这是一个警告信息，修改参见http://www.codes51.com/article/detail_102407.html，更详细的tools介绍见http://blog.csdn.net/maosidiaoxian/article/details/41510581

 

Q：Android Studio常用功能介绍

A：http://ask.android-studio.org/?/article/23

 

Q：添加Android桌面快捷方式

A：参考：http://blog.csdn.net/liranke/article/details/23923693，注意权限添加

    <!-- 添加快捷方式 -->
    <uses-permission android:name="com.android.launcher.permission.INSTALL_SHORTCUT" />
    <!-- 移除快捷方式 -->
    <uses-permission android:name="com.android.launcher.permission.UNINSTALL_SHORTCUT" />
    <!-- 查询快捷方式 -->
    <uses-permission android:name="com.android.launcher.permission.READ_SETTINGS" />
    <uses-permission android:name="com.android.launcher3.permission.READ_SETTINGS" />