I tried to use an onTouch
and OnClicklistener
to turn the light on and off. It turns on the light, but doesn't turn it off again. I don't know what I'm doing wrong, because it turns on.
Here is my code:
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.content.pm.PackageManager;
import android.hardware.Camera;
import android.hardware.Camera.Parameters;
import android.os.Bundle;
import android.support.v7.app.ActionBarActivity;
import android.view.MotionEvent;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.view.View;
import android.view.WindowManager;
import android.widget.Button;
import android.widget.FrameLayout;
import android.widget.ImageButton;
import android.widget.TextView;
import java.util.List;
public class MainActivity extends ActionBarActivity {
public Camera camera;
private Camera.Parameters params;
ImageButton flashlightSwitchImg;
private boolean isFlashlightOn;
private boolean isFlashLightOff;
TextView textViewbutton;
private boolean hasCam;
private SurfaceHolder mHolder;
public boolean hasFlash() {
if (camera == null) {
return false;
}
Camera.Parameters parameters = camera.getParameters();
if (parameters.getFlashMode() == null) {
return false;
}
List<String> supportedFlashModes = parameters.getSupportedFlashModes();
if (supportedFlashModes == null || supportedFlashModes.isEmpty() || supportedFlashModes.size() == 1 && supportedFlashModes.get(0).equals(Camera.Parameters.FLASH_MODE_OFF)) {
return false;
}
return true;
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
flashlightSwitchImg = (ImageButton) findViewById(R.id.imageButton);
textViewbutton = (TextView) findViewById(R.id.textView2);
try {
//Log.d("TORCH", "Check cam");
// Get CAM reference
camera = Camera.open();
params = camera.getParameters();
camera.startPreview();
hasCam = true;
//Log.d("TORCH", "HAS CAM ["+hasCam+"]");
} catch (Throwable t) {
t.printStackTrace();
}
if (hasFlash()) {
} else {
AlertDialog.Builder alertDialog = new AlertDialog.Builder(MainActivity.this);
alertDialog.setCancelable(false);
// Setting Dialog Title
alertDialog.setTitle("Flashlight not available...");
// Setting Dialog Message
alertDialog.setMessage("Your device is not compatible with this app or doesn't have a flashlight. DO YOU WANT TO USE YOUR SCREEN AS A TORCH INSTEAD?");
// Setting Positive "Yes" Button
alertDialog.setPositiveButton("Yes, of course", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
FrameLayout legacy = (FrameLayout) findViewById(R.id.legacy);
// Write your code here to invoke YES event
legacy.setVisibility(View.VISIBLE);
WindowManager.LayoutParams layout = getWindow().getAttributes();
layout.screenBrightness = 1F;
getWindow().setAttributes(layout);
}
});
// Setting Negative "NO" Button
alertDialog.setNegativeButton("No, thanks", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
// Write your code here to invoke NO event
System.exit(0);
}
});
// Showing Alert Message
alertDialog.show();
}
flashlightSwitchImg.setOnTouchListener(new View.OnTouchListener() {
@Override
public boolean onTouch(View v, MotionEvent event) {
if (isFlashlightOn) {
turnOff();
} else {
turnOn();
}
return false;
}
});
}
public void turnOn() {
params.setFlashMode(Camera.Parameters.FLASH_MODE_TORCH);
camera.setParameters(params);
camera.startPreview();
textViewbutton.setText(R.string.light_turn_off);
}
public void turnOff() {
params.setFlashMode(Camera.Parameters.FLASH_MODE_OFF);
camera.setParameters(params);
camera.stopPreview();
textViewbutton.setText(R.string.lo);
}
}
picking at the little things looks as thought you never change the value of "isFlashlightOn" or "isFlashlightOff". you are using "isFlashlightOn" in you if statement.
So i recomend removing "isFlashlightOff", and changing the "IsFlashlightOn" Value here.
like so:
By the way. it still runs without crashing but only turns on because the value defaults to false.