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ElyDantas/FlashLightBlinkerFragment.java

Created September 14, 2017 00:49
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Example of code to turn on/off a android flashlight in a particular sequence and speed
Raw
FlashLightBlinkerFragment.java
package esmaltec.etalk;
import android.content.pm.PackageManager;
import android.hardware.Camera;
import android.hardware.camera2.CameraAccessException;
import android.hardware.camera2.CameraCharacteristics;
import android.hardware.camera2.CameraManager;
import android.os.Build;
import android.os.Bundle;
import android.os.Handler;
import android.support.v4.app.Fragment;
import android.support.v4.content.ContextCompat;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.EditText;
import android.widget.SeekBar;
import android.widget.TextView;
import android.widget.ToggleButton;
import java.util.Random;
import java.util.Timer;
import java.util.TimerTask;
import static android.content.Context.CAMERA_SERVICE;
import static java.lang.Integer.MIN_VALUE;
/**
* A placeholder fragment containing a simple view.
*/
public class MainActivityFragment extends Fragment {
private View view;
private SeekBar seekBar;
private View flashView;
private ToggleButton toggleButtonFlashHardware;
private ToggleButton toggleButtonFlashView;
private EditText textViewSeekBarValue;
private Camera mCamera;
private Camera.Parameters mParams;
private CameraManager mManager;
private EditText editTextCodigo;
private Thread mThread;
public MainActivityFragment() {
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
view = inflater.inflate(R.layout.fragment_main, container, false);
textViewSeekBarValue = (EditText) view.findViewById(R.id.textViewSeekBarValue);
editTextCodigo = (EditText) view.findViewById(R.id.editTextCodigo);
seekBar = (SeekBar) view.findViewById(R.id.seekBar);
flashView = (View) view.findViewById(R.id.flashView);
toggleButtonFlashHardware = (ToggleButton) view.findViewById(R.id.toggleButtonFlashHardware);
toggleButtonFlashView = (ToggleButton) view.findViewById(R.id.toggleButtonFlashView);
if (seekBar.getProgress() < MIN_VALUE) {
seekBar.setProgress(1);
}
seekBar.setProgress(100);
textViewSeekBarValue.setText("100");
seekBar.setMax(1000);
turnOffFlashView();
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
mManager = (CameraManager) getActivity().getSystemService(CAMERA_SERVICE);
} else {
mCamera = Camera.open();
mParams = mCamera.getParameters();
}
seekBar.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
@Override
public void onProgressChanged(SeekBar seekBar, int i, boolean b) {
textViewSeekBarValue.setText(String.valueOf(seekBar.getProgress()));
}
@Override
public void onStartTrackingTouch(SeekBar seekBar) {
}
@Override
public void onStopTrackingTouch(SeekBar seekBar) {
}
});
toggleButtonFlashView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
if (toggleButtonFlashView.isChecked()) {
mThread = new Thread(new Runnable() {
@Override
public void run() {
try {
Thread.sleep(3000);
for (int i = 0; i < editTextCodigo.getText().length(); i++) {
if (editTextCodigo.getText().charAt(i) == '0') {
getActivity().runOnUiThread(new Runnable() {
@Override
public void run() {
turnOffFlashView();
}
});
} else {
getActivity().runOnUiThread(new Runnable() {
@Override
public void run() {
turnOnFlashView();
}
});
}
if (i == editTextCodigo.getText().length()-1) {
getActivity().runOnUiThread(new Runnable() {
@Override
public void run() {
toggleButtonFlashView.setChecked(false);
turnOffFlashView();
}
});
return;
}
Thread.sleep(Integer.valueOf(textViewSeekBarValue.getText().toString()));
}
} catch (Exception e) {
e.getLocalizedMessage();
}
}
});
mThread.start();
} else {
mThread.interrupt();
turnOffFlashView();
}
}
});
toggleButtonFlashHardware.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
if (toggleButtonFlashHardware.isChecked()) {
long blinkDelay = Integer.valueOf(textViewSeekBarValue.getText().toString()); //Delay in ms
for (int i = 0; i < editTextCodigo.getText().length(); i++) {
if (editTextCodigo.getText().charAt(i) == '0') {
turnOffCameraFlash();
} else {
turnOnCameraFlash();
}
try {
Thread.sleep(blinkDelay);
} catch (InterruptedException e) {
e.printStackTrace();
}
if (i == editTextCodigo.getText().length() - 1)
toggleButtonFlashHardware.setChecked(false);
if (!toggleButtonFlashHardware.isChecked()) {
break;
}
}
} else {
turnOffCameraFlash();
}
}
});
return view;
}
private void turnOnFlashView() {
flashView.setBackgroundColor(ContextCompat.getColor(getContext(), android.R.color.white));
}
private void turnOffFlashView() {
flashView.setBackgroundColor(ContextCompat.getColor(getContext(), android.R.color.black));
}
private void turnOnCameraFlash() {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
try {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
mManager.setTorchMode(getCameraInstanceV2(), true);
}
} catch (CameraAccessException e) {
e.printStackTrace();
}
} else {
mParams.setFlashMode(Camera.Parameters.FLASH_MODE_TORCH);
mCamera.setParameters(mParams);
mCamera.startPreview();
}
}
private void turnOffCameraFlash() {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
try {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
mManager.setTorchMode(getCameraInstanceV2(), false);
}
} catch (CameraAccessException e) {
e.printStackTrace();
}
} else {
mParams.setFlashMode(Camera.Parameters.FLASH_MODE_OFF);
mCamera.setParameters(mParams);
mCamera.stopPreview();
}
}
/**
* Check if this device has a camera
*/
private boolean checkCameraFlashHardware() {
if (getActivity().getPackageManager().hasSystemFeature(PackageManager.FEATURE_CAMERA_FLASH)) {
// this device has a camera flash
return true;
} else {
// no camera flash on this device
return false;
}
}
/**
* A safe way to get an instance of the android.hardware.camera2 object.
*/
public String getCameraInstanceV2() {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
try {
for (String cameraId : mManager.getCameraIdList()) {
CameraCharacteristics chars = mManager.getCameraCharacteristics(cameraId);
if (chars.get(CameraCharacteristics.FLASH_INFO_AVAILABLE)) {
// Retorna a primeira camera com flash disponivel
return cameraId;
}
}
} catch (CameraAccessException e) {
e.printStackTrace();
}
}
return "-1";
}
/**
* A safe way to get an instance of the android.hardware.camera object.
*/
public static Camera getCameraInstanceV1() {
Camera c = null;
try {
c = Camera.open(); // attempt to get a Camera instance
} catch (Exception e) {
// Camera is not available (in use or does not exist)
}
return c; // returns null if camera is unavailable
}
@Override
public void onPause() {
super.onPause();
releaseCamera(); // release the camera immediately on pause event
}
private void releaseCamera() {
if (mCamera != null) {
mCamera.release(); // release the camera for other applications
mCamera = null;
}
}
}
Raw
fragment_main.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
>
<View
android:id="@+id/flashView"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="@color/colorAccent"
android:layout_above="@+id/textViewSeekBarValue" />
<EditText
android:id="@+id/textViewSeekBarValue"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="0.0"
android:inputType="numberDecimal"
android:layout_margin="10dp"
android:textAlignment="center"
android:layout_above="@+id/seekBar"
/>
<SeekBar
android:id="@+id/seekBar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margin="30dp"
android:layout_above="@+id/editTextCodigo"
/>
<EditText
android:id="@+id/editTextCodigo"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margin="10dp"
android:text="01010101010101010101010101010100110011001100110011000111000114000111000111000111000111000111000111000000111111000000111111000000111111000000111111"
android:layout_above="@+id/linearLayoutBottom"
/>
<LinearLayout
android:id="@+id/linearLayoutBottom"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="10dp"
android:layout_marginBottom="40dp"
android:layout_alignParentBottom="true"
android:gravity="center"
android:orientation="horizontal">
<ToggleButton
android:id="@+id/toggleButtonFlashView"
android:layout_width="match_parent"
android:layout_height="80dp"
android:textOn="ON"
android:textOff="OFF"
android:text="Tela"
/>
</LinearLayout>
</RelativeLayout>
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