Advance version number to 1.3.0

Focus that exact spot a user taps on. Helps getting a clear
image on some devices. After 3 seconds the app will return
to the best possible auto focus.

CHANGELOG.md

@@ -1,5 +1,10 @@
 # Change Log
 
+## 1.3.0
+* Support tap to focus
+* Save chose zoom level permanently
+* Update ZXing to latest version (3.3.2)
+
 ## 1.2.0
 * Added a camera zoom slider
 * Added an unobtrusive wallpaper background

app/build.gradle

@@ -14,8 +14,8 @@ android {
 		minSdkVersion 9
 		targetSdkVersion sdk_version
 
-		versionCode 5
-		versionName '1.2.0'
+		versionCode 6
+		versionName '1.3.0'
 
 		renderscriptTargetApi 24
 		renderscriptSupportModeEnabled true

app/src/main/AndroidManifest.xml

@@ -17,6 +17,7 @@
 		tools:ignore="UnusedAttribute"
 		android:allowBackup="true"
 		android:fullBackupContent="true"
+		android:supportsRtl="true"
 		android:label="@string/app_name"
 		android:icon="@mipmap/ic_launcher"
 		android:theme="@style/AppTheme">

app/src/main/kotlin/de/markusfisch/android/binaryeye/activity/CameraActivity.kt

@@ -12,16 +12,19 @@ import de.markusfisch.android.binaryeye.R
 import android.content.Context
 import android.content.Intent
 import android.content.pm.PackageManager
+import android.content.SharedPreferences
 import android.hardware.Camera
 import android.net.Uri
 import android.os.Bundle
 import android.os.Vibrator
+import android.preference.PreferenceManager
 import android.support.v4.app.ActivityCompat
 import android.support.v4.content.ContextCompat
 import android.support.v7.app.AppCompatActivity
 import android.support.v7.widget.Toolbar
 import android.view.Menu
 import android.view.MenuItem
+import android.view.MotionEvent
 import android.view.View
 import android.widget.SeekBar
 import android.widget.Toast
@@ -45,6 +48,7 @@ class CameraActivity : AppCompatActivity() {
 		}
 	}
 
+	private lateinit var preferences: SharedPreferences
 	private lateinit var vibrator: Vibrator
 	private lateinit var cameraView: CameraView
 	private lateinit var zoomBar: SeekBar
@@ -80,20 +84,24 @@ class CameraActivity : AppCompatActivity() {
 		initSystemBars(this)
 		setSupportActionBar(findViewById(R.id.toolbar) as Toolbar)
 
-		yuvToGray = YuvToGray(this)
+		preferences = PreferenceManager.getDefaultSharedPreferences(this)
 		vibrator = getSystemService(Context.VIBRATOR_SERVICE) as Vibrator
+		yuvToGray = YuvToGray(this)
 
 		cameraView = findViewById(R.id.camera_view) as CameraView
 		zoomBar = findViewById(R.id.zoom) as SeekBar
 
 		initCameraView()
+		setTapToFocus()
 		initZoomBar()
+		restoreZoom()
 		initFlashFab(findViewById(R.id.flash))
 	}
 
 	override fun onDestroy() {
 		super.onDestroy()
 		yuvToGray.destroy()
+		saveZoom()
 	}
 
 	override fun onNewIntent(intent: Intent) {
@@ -106,7 +114,7 @@ class CameraActivity : AppCompatActivity() {
 		System.gc()
 		if (hasCameraPermission()) {
 			cameraView.openAsync(CameraView.findCameraId(
-				Camera.CameraInfo.CAMERA_FACING_BACK))
+					Camera.CameraInfo.CAMERA_FACING_BACK))
 			startDecoding()
 		}
 	}
@@ -118,6 +126,7 @@ class CameraActivity : AppCompatActivity() {
 	}
 
 	override fun onRestoreInstanceState(savedState: Bundle) {
+		super.onRestoreInstanceState(savedState)
 		zoomBar.max = savedState.getInt(ZOOM_MAX)
 		zoomBar.progress = savedState.getInt(ZOOM_LEVEL)
 	}
@@ -159,7 +168,7 @@ class CameraActivity : AppCompatActivity() {
 		}
 
 		var text = intent.getStringExtra(Intent.EXTRA_TEXT)
-		if (text.isEmpty()) {
+		if (text == null || text.isEmpty()) {
 			return
 		}
 
@@ -191,6 +200,7 @@ class CameraActivity : AppCompatActivity() {
 					if (zoomBar.max != max) {
 						zoomBar.max = max
 						zoomBar.progress = max / 3
+						saveZoom()
 					}
 					parameters.setZoom(zoomBar.progress)
 				} else {
@@ -224,6 +234,24 @@ class CameraActivity : AppCompatActivity() {
 		})
 	}
 
+	private fun setTapToFocus() {
+		val runnable = Runnable {
+			cameraView.setFocusArea(null)
+		}
+		cameraView.setOnTouchListener({ v: View, event: MotionEvent ->
+			val camera = cameraView.getCamera()
+			camera?.cancelAutoFocus()
+			cameraView.setFocusArea(cameraView.calculateFocusRect(
+					event.getX(), event.getY(), 100))
+			camera?.autoFocus({ _: Boolean, _: Camera ->
+				cameraView.removeCallbacks(runnable)
+				cameraView.postDelayed(runnable, 3000)
+			})
+			v.performClick()
+			true
+		})
+	}
+
 	private fun initZoomBar() {
 		zoomBar.setOnSeekBarChangeListener(object :
 				SeekBar.OnSeekBarChangeListener {
@@ -251,6 +279,18 @@ class CameraActivity : AppCompatActivity() {
 		}
 	}
 
+	private fun saveZoom() {
+		val editor = preferences.edit()
+		editor.putInt(ZOOM_MAX, zoomBar.max)
+		editor.putInt(ZOOM_LEVEL, zoomBar.progress)
+		editor.apply()
+	}
+
+	private fun restoreZoom() {
+		zoomBar.max = preferences.getInt(ZOOM_MAX, zoomBar.max)
+		zoomBar.progress = preferences.getInt(ZOOM_LEVEL, zoomBar.progress)
+	}
+
 	private fun initFlashFab(fab: View) {
 		if (!packageManager.hasSystemFeature(
 				PackageManager.FEATURE_CAMERA_FLASH)) {

app/src/main/kotlin/de/markusfisch/android/binaryeye/activity/MainActivity.kt

@@ -21,7 +21,7 @@ class MainActivity : AppCompatActivity() {
 		private val DECODE = "decode"
 		private val DECODE_FORMAT = "decode_format"
 
-		fun getEncodeIntent(context: Context, text: String = ""): Intent {
+		fun getEncodeIntent(context: Context, text: String? = ""): Intent {
 			val intent = Intent(context, MainActivity::class.java)
 			intent.putExtra(ENCODE, text)
 			return intent

build.gradle

@@ -1,5 +1,5 @@
 buildscript {
-	ext.kotlin_version = '1.1.4-2'
+	ext.kotlin_version = '1.1.51'
 	ext.tools_version = '2.3.3'
 	ext.build_tools_version = '26.0.0'
 	ext.sdk_version = 26

cameraview/build.gradle

@@ -18,8 +18,8 @@ android {
 		minSdkVersion 9
 		targetSdkVersion sdk_version
 
-		versionCode 4
-		versionName '1.2.1'
+		versionCode 5
+		versionName '1.3.0'
 	}
 }
 

cameraview/src/main/java/de/markusfisch/android/cameraview/widget/CameraView.java

@@ -15,6 +15,7 @@ import android.view.WindowManager;
 import android.widget.FrameLayout;
 
 import java.io.IOException;
+import java.util.ArrayList;
 import java.util.List;
 
 public class CameraView extends FrameLayout {
@@ -183,6 +184,43 @@ public class CameraView extends FrameLayout {
 		return frameOrientation;
 	}
 
+	public Rect calculateFocusRect(float x, float y, int radius) {
+		int cx = Math.round(2000f / viewWidth * x - 1000f);
+		int cy = Math.round(2000f / viewHeight * y - 1000f);
+		return new Rect(
+				Math.max(-1000, cx - radius),
+				Math.max(-1000, cy - radius),
+				Math.min(1000, cx + radius),
+				Math.min(1000, cy + radius));
+	}
+
+	@TargetApi(Build.VERSION_CODES.ICE_CREAM_SANDWICH)
+	public boolean setFocusArea(Rect area) {
+		if (camera == null || Build.VERSION.SDK_INT <
+				Build.VERSION_CODES.ICE_CREAM_SANDWICH) {
+			return false;
+		}
+		try {
+			Camera.Parameters parameters = camera.getParameters();
+			if (parameters.getMaxNumFocusAreas() > 0) {
+				if (area != null) {
+					List<Camera.Area> focusAreas =
+							new ArrayList<Camera.Area>();
+					focusAreas.add(new Camera.Area(area, 1000));
+					parameters.setFocusAreas(focusAreas);
+					parameters.setFocusMode(Camera.Parameters.FOCUS_MODE_AUTO);
+				} else {
+					parameters.setFocusAreas(null);
+					CameraView.setAutoFocus(parameters);
+				}
+			}
+			camera.setParameters(parameters);
+			return true;
+		} catch (RuntimeException e) {
+			return false;
+		}
+	}
+
 	@Override
 	protected void onLayout(
 			boolean changed,