我尝试通过按钮激活手电筒，起初它刚刚崩溃，现在它没有崩溃，但没有发生任何事情，我尝试这个应用程序我的LG V10，没有什么好处，闪光剂量工作，我不知道该怎么办。 感谢。
//pulse check variebls
private CountDownTimer countDownTimer;
private Button pulse,start,cal;
private TextView time,tvah;
private EditText howmuch;
//eyes check variebls
private Camera camera;
private boolean isFlashOn;
private boolean hasFlash;
Parameters params;
private Button on;
private Button flash;
//breath check
private Button breath;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
hasFlash = getApplicationContext().getPackageManager().hasSystemFeature(PackageManager.FEATURE_CAMERA_FLASH);
//pulse test variebles
howmuch = (EditText) findViewById(R.id.Howmuch);
cal = (Button) findViewById(R.id.cal);
pulse = (Button) findViewById(R.id.pulse);
start = (Button) findViewById(R.id.start);
time = (TextView) findViewById(R.id.time);
tvah = (TextView) findViewById(R.id.tvah);
//pulse check start
pulse.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
tvah.setVisibility(View.INVISIBLE);
time.setVisibility(View.INVISIBLE);
howmuch.setVisibility(View.INVISIBLE);
cal.setVisibility(View.INVISIBLE);
start.setVisibility(View.VISIBLE);
time.setVisibility(View.VISIBLE);
on.setVisibility(View.INVISIBLE);
time.setText("00:15:00");
//start button
start.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if (start.getText().equals("התחל!")) {
//start
start.setBackgroundColor(Color.RED);
start.setText("עצור!");
countDownTimer = new CountDownTimer(15 * 1000, 100) {
@Override
public void onTick(long millisUntilFinished) {
time.setText("00:" + millisUntilFinished / 1000 + ":" + millisUntilFinished % (int) Math.pow(10, (int) Math.log10(millisUntilFinished))/10);
}
@Override
public void onFinish() {
time.setText("נגמר הזמן!");
start.setBackgroundColor(Color.GREEN);
start.setText("התחל!");
howmuch.setVisibility(View.VISIBLE);
cal.setVisibility(View.VISIBLE);
//cal start
cal.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
int num = Integer.parseInt(howmuch.getText().toString());
howmuch.setHint(num + " * 4 = " + num * 4);
howmuch.setText(null);
if (num * 4 >= 60 && num * 4 <= 100) {
tvah.setText("דופק תקין!");
tvah.setTextColor(Color.GREEN);
} else if (num * 4 > 100) {
tvah.setText("דופק לא תקין! גבוה.");
tvah.setTextColor(Color.RED);
} else {
tvah.setText("דופק לא תקין! נמוך.");
tvah.setTextColor(Color.RED);
}
tvah.setVisibility(View.VISIBLE);
}
});
//cal ends
}
};
countDownTimer.start();
} else {
//stop
start.setBackgroundColor(Color.GREEN);
start.setText("התחל!");
if (countDownTimer != null) {
countDownTimer.cancel();
countDownTimer = null;
}
}
}
});
//stop start button
}
});
//stop pulse check
//eyes check start
//breath start
breath = (Button) findViewById(R.id.breath);
breath.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
tvah.setVisibility(View.INVISIBLE);
time.setVisibility(View.INVISIBLE);
on.setVisibility(View.INVISIBLE);
howmuch.setVisibility(View.INVISIBLE);
cal.setVisibility(View.INVISIBLE);
start.setVisibility(View.VISIBLE);
time.setVisibility(View.VISIBLE);
time.setText("00:30:00");
//start button
start.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if (start.getText().equals("התחל!")) {
//start
start.setBackgroundColor(Color.RED);
start.setText("עצור!");
countDownTimer = new CountDownTimer(30 * 1000, 100) {
@Override
public void onTick(long millisUntilFinished) {
time.setText("00:" + millisUntilFinished / 1000 + ":" + millisUntilFinished % (int) Math.pow(10, (int) Math.log10(millisUntilFinished))/10);
}
@Override
public void onFinish() {
time.setText("נגמר הזמן!");
start.setBackgroundColor(Color.GREEN);
start.setText("התחל!");
howmuch.setVisibility(View.VISIBLE);
cal.setVisibility(View.VISIBLE);
//cal start
cal.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
int num = Integer.parseInt(howmuch.getText().toString());
howmuch.setHint(num + " * 2 = " + num * 2);
howmuch.setText(null);
if (num * 2 >= 12 && num * 2 <= 20) {
tvah.setText("נשימות תקינות!");
tvah.setTextColor(Color.GREEN);
} else if (num * 2 > 20) {
tvah.setText("נשימות לא תקינות! יותר מדי נשימות.");
tvah.setTextColor(Color.RED);
} else {
tvah.setText("נשימות לא תקינות! פחות מדי נשימות.");
tvah.setTextColor(Color.RED);
}
tvah.setVisibility(View.VISIBLE);
}
});
//cal ends
}
};
countDownTimer.start();
} else {
//stop
start.setBackgroundColor(Color.GREEN);
start.setText("התחל!");
if (countDownTimer != null) {
countDownTimer.cancel();
countDownTimer = null;
}
}
}
});
//stop start button
}
});
//breath ends
flash = (Button) findViewById(R.id.flash);
on = (Button) findViewById(R.id.on);
flash.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
start.setVisibility(View.INVISIBLE);
cal.setVisibility(View.INVISIBLE);
tvah.setVisibility(View.INVISIBLE);
time.setVisibility(View.INVISIBLE);
howmuch.setVisibility(View.INVISIBLE);
if (!hasFlash) {
AlertDialog.Builder builder = new AlertDialog.Builder(MainActivity.this);
builder.setTitle("שגיאה!");
builder.setMessage("במכשיר זה , לא קיימת אפשרות להדליק פנס!");
builder.setPositiveButton("Ok", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
dialog.dismiss();
}
});
AlertDialog alertDialog = builder.create();
alertDialog.show();
on.setVisibility(View.INVISIBLE);
}
else {
getCamera();
on.setBackgroundColor(Color.GREEN);
on.setVisibility(View.VISIBLE);
}
}
});
//flash start
on.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if (isFlashOn) {
turnOffFlash();
on.setBackgroundColor(Color.GREEN);
on.setText("הדלק פנס!");
}
else {
turnOnFlash();
on.setBackgroundColor(Color.RED);
on.setText("עצור פנס!");
}
}
});
//flash finished
}
private void getCamera() {
if (camera == null) {
try {
camera = Camera.open();
params = camera.getParameters();
}catch (Exception e) {
}
}
}
private void turnOnFlash() {
if(!isFlashOn) {
if(camera == null || params == null) {
return;
}
params = camera.getParameters();
params.setFlashMode(Parameters.FLASH_MODE_AUTO);
camera.setParameters(params);
isFlashOn = true;
}
}
private void turnOffFlash() {
if (isFlashOn) {
if (camera == null || params == null) {
return;
}
params = camera.getParameters();
params.setFlashMode(Parameters.FLASH_MODE_OFF);
camera.setParameters(params);
isFlashOn = false;
}
}
@Override
protected void onDestroy() {
super.onDestroy();
}
@Override
protected void onPause() {
super.onPause();
// on pause turn off the flash
turnOffFlash();
}
@Override
protected void onRestart() {
super.onRestart();
}
@Override
protected void onResume() {
super.onResume();
// on resume turn on the flash
if(hasFlash)
turnOnFlash();
}
@Override
protected void onStart() {
super.onStart();
// on starting the app get the camera params
getCamera();
}
@Override
protected void onStop() {
super.onStop();
// on stop release the camera
if (camera != null) {
camera.release();
camera = null;
}
}