我正在尝试制作一个使用加速度计来检测用户运动并触发一些事件的应用程序。该应用程序需要大量工作，但每次我在手机中运行该应用程序时，我都会收到错误“线程启动”，但似乎什么也没发生。
这是LogCat：
04-15 17:46:21.380: E/BANANA(2516): Before sensor
04-15 17:46:21.380: D/SensorManager(2516): registerListener :: handle = 0 name= K2DM delay= 200000 Listener= com.example.rockpaperaccelerate.UseSensor@413cdf98
04-15 17:46:21.380: E/SensorManager(2516): thread start
04-15 17:46:21.520: E/BANANA(2516): AFter sensor
04-15 17:46:21.680: D/libEGL(2516): loaded /system/lib/egl/libGLES_android.so
04-15 17:46:21.800: D/libEGL(2516): loaded /system/lib/egl/libGLES_rhea.so
04-15 17:46:21.960: D/BRCM_EGL(2516): eglCreateContext() config: 18 context: 0x12e0a0, VC context 1, Thread 2516
04-15 17:46:21.960: D/BRCM_EGL(2516): eglCreateWindowSurface() surface: 0x2aa080, VC surface: 1, Thread: 2516
04-15 17:46:21.960: D/BRCM_EGL(2516): eglMakeCurrent(0x12e0a0, 0x2aa080, 0x2aa080) Thread: 2516
04-15 17:46:21.980: D/OpenGLRenderer(2516): Enabling debug mode 0
04-15 17:46:22.441: D/CLIPBOARD(2516): Hide Clipboard dialog at Starting input: finished by someone else... !
这是发生一切的活动：
public class UseSensor extends Activity implements SensorEventListener{
private SensorManager mSensorManager;
private Sensor mSensor;
public int choice;
public WebView myWebView1;
public WebView myWebView2;
public TextView myTextView;
public String louts[]={"rock","paper","scissors"};
public int i=0;
public float gravity[]={0,0,0};
public float linear_acceleration[]={0,0,0};
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.rock_paper_accelerate_with_sensors);
Log.e("BANANA","Before sensor");
mSensorManager = (SensorManager) getSystemService(Context.SENSOR_SERVICE);
mSensor = mSensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER);
mSensorManager.registerListener(this, mSensor, SensorManager.SENSOR_DELAY_NORMAL);
Log.e("BANANA","AFter sensor");
}
public void onRadioButtonClicked(View view) {
// Is the button now checked?
boolean checked = ((RadioButton) view).isChecked();
// Check which radio button was clicked
switch(view.getId()) {
case R.id.radio1:
if (checked)
// player chose rock
choice=1;
break;
case R.id.radio2:
if (checked)
// player chose paper
choice=2;
break;
case R.id.radio3:
if (checked)
// player chose scissors
choice=3;
break;
}
}
public void checkWin(int choice){
Random generator = new Random();
int machine = generator.nextInt( 3 )+1;
setContentView(R.layout.show_results);
myWebView1 = (WebView) findViewById(R.id.webView1);
myWebView2 = (WebView) findViewById(R.id.webView2);
myTextView = (TextView) findViewById(R.id.textView1);
switch (machine){
case 1: myWebView1.loadUrl("file:///android_asset/1.jpg");
break;
case 2: myWebView1.loadUrl("file:///android_asset/2.jpg");
break;
case 3: myWebView1.loadUrl("file:///android_asset/3.jpg");
break;
}
switch (choice){
case 1: myWebView2.loadUrl("file:///android_asset/1.jpg");
break;
case 2: myWebView2.loadUrl("file:///android_asset/2.jpg");
break;
case 3: myWebView2.loadUrl("file:///android_asset/3.jpg");
break;
}
if (choice==machine){
myTextView.setText("This is a tie!");
}
else if ((choice==3 && machine==2)||(choice==2 && machine==1)||(choice==1 && machine==3)){
myTextView.setText("You Win!");
}
else{
myTextView.setText("You Lose!");
}
Button myButton = (Button)findViewById(R.id.button1);
myButton.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
i=0;
Intent intent= new Intent(v.getContext(), UseSensor.class);
startActivityForResult(intent, 0);
}
});
}
@Override
public void onAccuracyChanged(Sensor arg0, int arg1) {
// TODO Auto-generated method stub
}
@Override
public void onSensorChanged(SensorEvent event) {
final float alpha = (float) 0.8;
gravity[0] = alpha * gravity[0] + (1 - alpha) * event.values[0];
gravity[1] = alpha * gravity[1] + (1 - alpha) * event.values[1];
gravity[2] = alpha * gravity[2] + (1 - alpha) * event.values[2];
linear_acceleration[0] = event.values[0] - gravity[0];
linear_acceleration[1] = event.values[1] - gravity[1];
linear_acceleration[2] = event.values[2] - gravity[2];
if (linear_acceleration[1]<-4.0){
if(i<3){
int findId = this.getResources().getIdentifier("com.example.rockpaperaccelerate:layout/" + louts[i], null, null);
setContentView(findId);
i=i+1;}
if (i==3){
mSensorManager.unregisterListener(this);
i=0;
checkWin(choice);
}
}
}
}
在这种情况下可能是误报还是我做错了什么。活动继续进行而不停止。在调用 UseSensor 的主要活动中，我再次使用 SensorManager。代码片段是：
mSensorManager = (SensorManager) getSystemService(Context.SENSOR_SERVICE);
if (mSensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER) != null){
// Success! There's an accelerometer sensor
Intent intent= new Intent(this,UseSensor.class);
startActivity(intent);
}
这与错误有关吗？
感谢您的时间。
- - - - - 编辑 - - - - - - - - - - - -
错误仍然存在，但仅在我第一次从 eclipse 运行应用程序时出现。如果我停止应用程序并从手机的主屏幕再次运行它，它不会出现。应用程序有时会停止工作，但没有给我任何其他错误. 我稍微更改了我的代码，添加了另一个 if
if(choice !=0){
if (linear_acceleration[1]<-4.0){
if(i<3){
int findId = this.getResources().getIdentifier("com.example.rockpaperaccelerate:layout/" + louts[i], null, null);
setContentView(findId);
i=i+1;}
if (i==3){
mSensorManager.unregisterListener(this);
i=0;
checkWin(choice);
}
}
}
我还尝试了 Lukas在这里提出的建议，但没有成功。我还实现了我的应用程序的另一个版本，它只有一个活动，问题仍然存在。唯一发生的事情是，有时应用程序停止工作而没有任何其他 logCat 错误
第二次实施
public class RockPaper3 extends Activity implements SensorEventListener {
private SensorManager mSensorManager;
private Sensor mSensor;
public int choice=0;
public ImageView myImage1,myImage2;
public TextView myTextView;
public String louts[]={"rock","paper","scissors"};
public int i=0;
public float gravity[]={0,0,0};
public float linear_acceleration[]={0,0,0};
public boolean withSensor=true;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
mSensorManager = (SensorManager) getSystemService(Context.SENSOR_SERVICE);
mSensor = mSensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER);
mSensorManager.registerListener(this, mSensor, SensorManager.SENSOR_DELAY_NORMAL);
if (mSensor != null){
// Success! There's an accelerometer sensor
setContentView(R.layout.rock_paper_accelerate_with_sensors);
withSensor=true;
}
else {
mSensorManager.unregisterListener(this);
setContentView(R.layout.activity_rock_paper3);
withSensor=false;
}
}
public void onRadioButtonClicked(View view) {
// Is the button now checked?
boolean checked = ((RadioButton) view).isChecked();
// Check which radio button was clicked
switch(view.getId()) {
case R.id.radio1:
if (checked)
// player chose rock
choice=1;
break;
case R.id.radio2:
if (checked)
// player chose paper
choice=2;
break;
case R.id.radio3:
if (checked)
// player chose scissors
choice=3;
break;
}
if (withSensor==false){
checkWin(choice);
}
}
public void checkWin(int choice){
Random generator = new Random();
int machine = generator.nextInt( 3 )+1;
setContentView(R.layout.show_results);
myImage1 = (ImageView) findViewById(R.id.imageView1);
myImage2 = (ImageView) findViewById(R.id.imageView2);
myTextView = (TextView) findViewById(R.id.textView1);
switch (machine){
case 1: myImage1.setImageResource(R.drawable.rock);
break;
case 2: myImage1.setImageResource(R.drawable.paper);
break;
case 3: myImage1.setImageResource(R.drawable.scissors);
break;
}
switch (choice){
case 1: myImage2.setImageResource(R.drawable.rock);
break;
case 2: myImage2.setImageResource(R.drawable.paper);
break;
case 3: myImage2.setImageResource(R.drawable.scissors);
break;
}
if (choice==machine){
myTextView.setText("This is a tie!");
}
else if ((choice==3 && machine==2)||(choice==2 && machine==1)||(choice==1 && machine==3)){
myTextView.setText("You Win!");
}
else{
myTextView.setText("You Lose!");
}
Button myButton = (Button)findViewById(R.id.button1);
myButton.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
i=0;
Intent intent= new Intent(v.getContext(), RockPaper3.class);
intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
finish();
startActivity(intent);
}
});
}
/*
public void checkWin(int choice){
Random generator = new Random();
int machine = generator.nextInt( 3 )+1;
setContentView(R.layout.show_results);
myWebView1 = (WebView) findViewById(R.id.webView1);
myWebView2 = (WebView) findViewById(R.id.webView2);
myTextView = (TextView) findViewById(R.id.textView1);
switch (machine){
case 1: myWebView1.loadUrl("file:///android_asset/1.jpg");
break;
case 2: myWebView1.loadUrl("file:///android_asset/2.jpg");
break;
case 3: myWebView1.loadUrl("file:///android_asset/3.jpg");
break;
}
switch (choice){
case 1: myWebView2.loadUrl("file:///android_asset/1.jpg");
break;
case 2: myWebView2.loadUrl("file:///android_asset/2.jpg");
break;
case 3: myWebView2.loadUrl("file:///android_asset/3.jpg");
break;
}
if (choice==machine){
myTextView.setText("This is a tie!");
}
else if ((choice==3 && machine==2)||(choice==2 && machine==1)||(choice==1 && machine==3)){
myTextView.setText("You Win!");
}
else{
myTextView.setText("You Lose!");
}
Button myButton = (Button)findViewById(R.id.button1);
myButton.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
i=0;
Intent intent= new Intent(v.getContext(), RockPaper3.class);
intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
finish();
startActivity(intent);
}
});
}*/
@Override
protected void onResume(){
mSensorManager = (SensorManager) getSystemService(Context.SENSOR_SERVICE);
mSensor = mSensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER);
mSensorManager.registerListener(this, mSensor, SensorManager.SENSOR_DELAY_NORMAL);
super.onResume();
}
@Override
protected void onPause(){
mSensorManager.unregisterListener(this);
super.onPause();
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.rock_paper3, menu);
return true;
}
@Override
public void onAccuracyChanged(Sensor arg0, int arg1) {
// TODO Auto-generated method stub
}
@Override
public void onSensorChanged(SensorEvent event) {
final float alpha = (float) 0.8;
gravity[1] = alpha * gravity[1] + (1 - alpha) * event.values[1];
linear_acceleration[1] = event.values[1] - gravity[1];
if(choice !=0){
if (linear_acceleration[1]<-4.0){
if(i<3){
int findId = this.getResources().getIdentifier("com.example.rockpaperv3:layout/" + louts[i], null, null);
setContentView(findId);
i=i+1;}
if (i==3){
mSensorManager.unregisterListener(this);
i=0;
checkWin(choice);
}
}
}
}
}
任何想法这个错误意味着什么以及为什么我的应用程序有时会崩溃而没有任何错误？我突然想到，对于我的手机来说，处理这个写得很糟糕的应用程序和所有加速度计注册可能太重了。
编辑2
当我注册监听器时发生错误
编辑3
改了很多，app运行流畅，但一直报错，注册监听一定是虚惊一场