[英]Activate proximity sensor on button click
I am trying to register the proximity sensor listener only when a button is clicked. 我试图仅在单击按钮时注册接近传感器侦听器。 But nothing seems to happen.
但是似乎什么也没发生。 I ahve tried exploring the internet for something of the sort but could not get anything.
我曾尝试过在互联网上进行某种搜索,但无法获得任何信息。 What am I doing wrong?
我究竟做错了什么? Please help!
请帮忙!
The xml file : xml文件 :
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/RelativeLayout1"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@drawable/pushupbg"
android:orientation="vertical" >
<TextView
android:id="@+id/tvTitlePU"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:text="Push Up Counter"
android:textColor="#98f5ff"
android:textSize="25sp"
android:padding="10sp"
android:textAppearance="?android:attr/textAppearanceLarge" />
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_above="@+id/fragment1"
android:layout_centerHorizontal="true"
android:layout_marginBottom="20dp"
android:orientation="horizontal" >
<Button
android:id="@+id/bStart"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:padding="10dp"
android:typeface="serif"
android:onClick="startCounter"
android:text="Start" />
<Button
android:id="@+id/bStop"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:padding="10dp"
android:typeface="serif"
android:onClick="stopCounter"
android:text="Stop" />
<Button
android:id="@+id/bSave"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:padding="10dp"
android:typeface="serif"
android:onClick="saveData"
android:text="Save" />
</LinearLayout>
<TextView
android:id="@+id/tvCount"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@+id/tvTitlePU"
android:layout_centerHorizontal="true"
android:layout_marginTop="22dp"
android:text=""
android:textColor="#ffffff"
android:textAppearance="?android:attr/textAppearanceLarge" />
</RelativeLayout>
And here is the java file : 这是java文件 :
public class PushUp_Counter extends Activity implements SensorEventListener {
SensorManager smgr;
Sensor sensor;
Button start,stop,save;
TextView title,count;
int counter=0;
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.pushup_layout);
start=(Button)findViewById(R.id.bStart);
stop=(Button)findViewById(R.id.bStop);
save=(Button)findViewById(R.id.bSave);
title=(TextView)findViewById(R.id.tvTitlePU);
count=(TextView)findViewById(R.id.tvCount);
stop.setEnabled(false);
save.setEnabled(false);
}
public void startCounter(View v) {
// TODO Auto-generated method stub
smgr=(SensorManager)getSystemService(SENSOR_SERVICE);
sensor=smgr.getDefaultSensor(Sensor.TYPE_PROXIMITY);
smgr.registerListener(this, sensor,SensorManager.SENSOR_DELAY_NORMAL);
stop.setEnabled(true);
}
public void stopCounter(View v) {
// TODO Auto-generated method stub
smgr.unregisterListener(this);
save.setEnabled(true);
}
public void saveData(View v) {
// TODO Auto-generated method stub
}
@Override
public void onAccuracyChanged(Sensor arg0, int arg1) {
// TODO Auto-generated method stub
}
@Override
public void onSensorChanged(SensorEvent arg0) {
// TODO Auto-generated method stub
if (arg0.values[0] == 0){
counter++;
count.setText("Your count is: "+counter);
}
}
}
Logcat: Logcat:
06-19 00:01:21.780: W/EGL_genymotion(1493): eglSurfaceAttrib not implemented 06-19 00:01:29.396: I/ActivityManager(401): START u0 {cmp=com.example.fitgo/.PushUp_Counter} from pid 1493 06-19 00:01:29.412: W/genymotion_audio(125): out_write() limiting sleep time 44149 to 23219 06-19 00:01:29.452: W/genymotion_audio(125): out_write() limiting sleep time 55759 to 23219 06-19 00:01:29.472: W/genymotion_audio(125): out_write() limiting sleep time 67369 to 23219 06-19 00:01:29.504: W/genymotion_audio(125): out_write() limiting sleep time 58979 to 23219 06-19 00:01:29.524: W/genymotion_audio(125): out_write() limiting sleep time 40589 to 23219 06-19 00:01:29.548: W/genymotion_audio(125): out_write() limiting sleep time 32199 to 23219 06-19 00:01:29.572: W/genymotion_audio(125): out_write() limiting sleep time 23809 to 23219 06-19 00:01:29.856: D/dalvikvm(401): GC_FOR_ALLOC freed 441K, 17% free 13865K/16596K, paused 25ms, total 25ms 06-19 00:01:29.884: D/dalvikvm(401): GC_FOR_ALLOC freed 748K, 19% free 13487K/16596K, paused 22ms, total 22ms 06-19 00:01:29.884: D/MobileDataStateTracker(401): default: setPolicyDataEnable(enabled=true) 06-19 00:01:30.152: W/EGL_genymotion(1493): eglSurfaceAttrib not implemented 06-19 00:01:30.360: I/ActivityManager(401): Displayed com.example.fitgo/.PushUp_Counter: +458ms 06-19 00:01:34.372: W/genymotion_audio(125): out_write() limiting sleep time 44149 to 23219 06-19 00:01:34.396: W/genymotion_audio(125): out_write() limiting sleep time 55759 to 23219 06-19 00:01:34.424: W/genymotion_audio(125): out_write() limiting sleep time 47369 to 23219 06-19 00:01:34.448: W/genymotion_audio(125): out_write() limiting sleep time 38979 to 23219 06-19 00:01:34.492: W/genymotion_audio(125): out_write() limiting sleep time 31178 to 23219 06-19 00:01:38.448: W/genymotion_audio(125): out_write() limiting sleep time 44149 to 23219 06-19 00:01:38.468: W/genymotion_audio(125): out_write() limiting sleep time 55759 to 23219 06-19 00:01:38.496: W/genymotion_audio(125): out_write() limiting sleep time 47369 to 23219 06-19 00:01:38.516: W/genymotion_audio(125): out_write() limiting sleep time 38979 to 23219 06-19 00:01:38.564: W/genymotion_audio(125): out_write() limiting sleep time 31178 to 23219
Add the onClickListener like this start.setOnClickListener(startCounter)
像这样添加
start.setOnClickListener(startCounter)
Or also you can do it by this way 或者你也可以这样
bStart.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
startCounter(v);
}
});
Let's make a change on your code to see if it's about your code or not. 让我们对您的代码进行更改,以查看它是否与您的代码有关。
First of all delete this line of code : 首先删除以下代码行:
android:onClick="startCounter"
Then on your PushUp_Counter
class change the header to this : 然后在您的
PushUp_Counter
类上,将标头更改为:
public class PushUp_Counter extends Activity implements SensorEventListener, OnClickListener {
You have to add on your onCreate()
this line of code : 您必须在
onCreate()
上添加以下代码行:
start.setOnClickListener(this);
Then you have to add the method onClick()
that looks like : 然后,您必须添加如下所示的
onClick()
方法:
@Override
public void onClick(View v) {
// getId() returns this view's identifier.
switch(v.getId()){
case R.id.bStart;
// TODO Auto-generated method stub
smgr=(SensorManager)getSystemService(SENSOR_SERVICE);
sensor=smgr.getDefaultSensor(Sensor.TYPE_PROXIMITY);
smgr.registerListener(this, sensor,SensorManager.SENSOR_DELAY_NORMAL);
stop.setEnabled(true);
break;
}
}
Comment the rest of code if it gives you any error, just try this button and let me know if it works. 如果其余代码有任何错误,请注释其余的代码,只需尝试此按钮,让我知道它是否有效。
您必须在onCreateView()方法中分配onClick侦听器
start.setOnClickListener( startCounter);
The sensor listener seems to work when registered in the onResume()
method. 在
onResume()
方法中注册后,传感器侦听器似乎可以工作。 What i have done is let the sensor listener be activated but not start the counter until the button is clicked. 我所做的是让传感器侦听器被激活,但是直到单击按钮后才启动计数器。 As soon as the button is clicked, a boolean variable turns true , which is checked in
onSensorChanged()
. 单击按钮后,布尔变量将变为true ,这将在
onSensorChanged()
进行检查。
The xml: xml:
<?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:id="@+id/RelativeLayout1" android:layout_width="match_parent" android:layout_height="match_parent" android:background="@drawable/pushupbg" android:orientation="vertical" > <fragment android:id="@+id/fragment1" android:name="com.example.fitgo.Frag_Pushup" android:layout_width="wrap_content" android:layout_height="250dp" android:layout_alignParentBottom="true" android:layout_alignParentLeft="true" /> <TextView android:id="@+id/tvTitlePU" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentTop="true" android:layout_centerHorizontal="true" android:text="Push Up Counter" android:textColor="#98f5ff" android:textSize="25sp" android:padding="10sp" android:textAppearance="?android:attr/textAppearanceLarge" /> <LinearLayout android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_above="@+id/fragment1" android:layout_centerHorizontal="true" android:layout_marginBottom="20dp" android:orientation="horizontal" > <Button android:id="@+id/bStart" android:layout_width="wrap_content" android:layout_height="wrap_content" android:padding="10dp" android:onClick="startCounter" android:typeface="serif" android:text="Start" /> <Button android:id="@+id/bStop" android:layout_width="wrap_content" android:layout_height="wrap_content" android:padding="10dp" android:typeface="serif" android:onClick="stopCounter" android:text="Stop" /> <Button android:id="@+id/bSave" android:layout_width="wrap_content" android:layout_height="wrap_content" android:padding="10dp" android:typeface="serif" android:onClick="saveData" android:text="Save" /> </LinearLayout> <TextView android:id="@+id/tvCount" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_below="@+id/tvTitlePU" android:layout_centerHorizontal="true" android:layout_marginTop="22dp" android:text="" android:textColor="#ffffff" android:textAppearance="?android:attr/textAppearanceLarge" /> </RelativeLayout>
The java file: Java文件:
public class PushUp_Counter extends Activity implements SensorEventListener { private SensorManager smgr; private Sensor sensor; Button start,stop,save; TextView title,count; int counter=0; boolean check; @Override protected void onCreate(Bundle savedInstanceState) { // TODO Auto-generated method stub super.onCreate(savedInstanceState); setContentView(R.layout.pushup_layout); start=(Button)findViewById(R.id.bStart); stop=(Button)findViewById(R.id.bStop); save=(Button)findViewById(R.id.bSave); title=(TextView)findViewById(R.id.tvTitlePU); count=(TextView)findViewById(R.id.tvCount); check=false; smgr=(SensorManager)getSystemService(SENSOR_SERVICE); sensor=smgr.getDefaultSensor(Sensor.TYPE_PROXIMITY); stop.setEnabled(false); save.setEnabled(false); } @Override protected void onResume() { // TODO Auto-generated method stub super.onResume(); smgr.registerListener(this, sensor,SensorManager.SENSOR_DELAY_NORMAL); } @Override protected void onPause() { // TODO Auto-generated method stub super.onPause(); smgr.unregisterListener(this); } public void startCounter(View v) { // TODO Auto-generated method stub check=true; stop.setEnabled(true); } public void stopCounter(View v) { // TODO Auto-generated method stub check=false; save.setEnabled(true); } public void saveData(View v) { // TODO Auto-generated method stub } @Override public void onAccuracyChanged(Sensor arg0, int arg1) { // TODO Auto-generated method stub } @Override public void onSensorChanged(SensorEvent arg0) { // TODO Auto-generated method stub if(check==true) { if (arg0.values[0] == 0){ counter++; count.setText("Your count is: "+counter); } } }}
I hope this would help someone like me. 我希望这会对像我这样的人有所帮助。
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