Article directory
I. Introduction
- Description: Sensors are an important component of machine products. Only a product with sensors can be more "emotional". For example, map navigation products require the use of a variety of sensors (direction sensors, magnetic field sensors, acceleration sensors, etc.). The existence of sensors can better express users' needs that cannot be described in detail in words.
- Difficulty: Intermediate
- Knowledge points:
1. Direction sensor
2. Acceleration sensor
3. Animation animation - Examples: compass, shake
2. Design
The virtual machine does not have sensors, so the sensor functions need to be simulated using a real machine.
1. Compass (direction sensor)
(1) Effect
(2)UI design
Suggestion: Regarding the src picture path in ImageView, it is best to choose a picture with a sense of direction (such as arrows, isosceles triangles).
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="center"
tools:context=".MainActivity">
<ImageView
android:id="@+id/image_znz"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:scaleType="fitCenter"
android:src="@drawable/znz"/>
</RelativeLayout>
(3) Functional design
Register sensor listener
SensorManager mSensorManager; //管理器
@Override
protected void onResume(){
super.onResume();
mSensorManager.registerListener(mylistenner
, mSensorManager.getDefaultSensor(Sensor.TYPE_ORIENTATION), SensorManager.SENSOR_DELAY_GAME);
}
Sensor event listener
ImageView image; //指南针图片
float currentDegree = 0f; //指南针图片转过的角度
Mylistenner mylistenner =new Mylistenner();
public class Mylistenner implements SensorEventListener{
@Override
public void onAccuracyChanged(Sensor sensor, int accuracy) {
//传感器值改变
// TODO Auto-generated method stub
}
@Override
public void onSensorChanged(SensorEvent event) {
//精度改变
// TODO Auto-generated method stub
//获取触发event的传感器类型
int sensorType = event.sensor.getType();
switch(sensorType){
case Sensor.TYPE_ORIENTATION:
float degree = event.values[0]; //获取z转过的角度
//穿件旋转动画
RotateAnimation ra = new RotateAnimation(currentDegree,-degree,Animation.RELATIVE_TO_SELF,0.5f
,Animation.RELATIVE_TO_SELF,0.5f);
ra.setDuration(100);//动画持续时间
image.startAnimation(ra);
currentDegree = -degree;
break;
}
}
}
Initialization code
image = (ImageView)findViewById(R.id.image_znz);
mSensorManager = (SensorManager)getSystemService(SENSOR_SERVICE); //获取管理服务
2. Shake (acceleration sensor)
(1) Effect
(2)UI design
Suggestion: It is best to divide a complete picture into two parts.
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#404445"
android:gravity="center"
tools:context=".MainActivity">
<ImageView
android:id="@+id/image_sha"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="@drawable/sha"/>
<ImageView
android:id="@+id/image_xia"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="@drawable/xia"
android:layout_below="@+id/image_sha"/>
</RelativeLayout>
Animation one translate_anim.xml
<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android">
<translate
android:fromXDelta="0.0"
android:fromYDelta="0.0"
android:toXDelta="0.0"
android:toYDelta="100"
android:repeatCount="infinite"
android:repeatMode="reverse"
android:duration="1000"/>
</set>
Animation 2 translatex_anim.xml
<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android">
<translate
android:fromXDelta="0.0"
android:fromYDelta="0.0"
android:toXDelta="0.0"
android:toYDelta="-100"
android:repeatCount="infinite"
android:repeatMode="reverse"
android:duration="1000" />
</set>
(3) Functional design
AndroidManifest.xml registration permissions
<uses-permission android:name="android.permission.VIBRATE" />
Acceleration sensor registration listener
private SensorManager sensorManager; //定义传感器管理器
@Override
protected void onResume() {
super.onResume();
sensorManager.registerListener(this,sensor , SensorManager.SENSOR_DELAY_GAME);
}
Sensor event listener
@Override
public void onSensorChanged(SensorEvent event) {
float[] values = event.values; //获取传感器X、Y、Z三个轴的输出信息
int sensorType = event.sensor.getType(); // 获取传感器类型
if (sensorType == Sensor.TYPE_ACCELEROMETER) {
//如果是加速度传感器
//X轴输出信息>15,Y轴输出信息>15,Z轴输出信息>20
if (values[0] > 15 || values[1] > 15 || values[2] > 20) {
//动画向上
Animation translate_sha = AnimationUtils.loadAnimation(this,R.anim.translatex_anim);
sha.startAnimation(translate_sha);
//动画向下
Animation translate_xia = AnimationUtils.loadAnimation(this,R.anim.translate_anim);
xia.startAnimation(translate_xia);
Toast.makeText(MainActivity.this, "不好意思，摇晚了！！", Toast.LENGTH_SHORT).show();
vibrator.vibrate(500); //设置振动器频率
sensorManager.unregisterListener(this); //取消注册监听器
}
}
}
3. Accessories
(CSDN download address)
Orientation sensor: https://download.csdn.net/download/weixin_48916759/87916890
Acceleration sensor: https://download.csdn.net/download/weixin_48916759/87916891
(Gitee download address)
Orientation sensor: https ://gitee.com/xu-pq/android-demo/tree/master/zhinanzhenAcceleration
sensor: https://gitee.com/xu-pq/android-demo/tree/master/yaoyiyao