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POtakePicture failed after autofocus for the second time
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  1. POtakePicture failed after autofocus for the second time
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    copied!<p>I am developing an android camera app, using autofocus.</p> <p>The issue, i am able to capture for the first time, but when i am trying to capture for the second time the below exception occurs.</p> <pre><code>4-19 11:28:32.509: E/AndroidRuntime(4409): FATAL EXCEPTION: main 04-19 11:28:32.509: E/AndroidRuntime(4409): java.lang.RuntimeException: takePicture failed 04-19 11:28:32.509: E/AndroidRuntime(4409): at android.hardware.Camera.native_takePicture(Native Method) 04-19 11:28:32.509: E/AndroidRuntime(4409): at android.hardware.Camera.takePicture(Camera.java:878) 04-19 11:28:32.509: E/AndroidRuntime(4409): at android.hardware.Camera.takePicture(Camera.java:842) 04-19 11:28:32.509: E/AndroidRuntime(4409): at com.example.camerasample.MainActivity$4.onClick(MainActivity.java:60) 04-19 11:28:32.509: E/AndroidRuntime(4409): at android.view.View.performClick(View.java:2485) 04-19 11:28:32.509: E/AndroidRuntime(4409): at android.view.View$PerformClick.run(View.java:9080) 04-19 11:28:32.509: E/AndroidRuntime(4409): at android.os.Handler.handleCallback(Handler.java:587) 04-19 11:28:32.509: E/AndroidRuntime(4409): at android.os.Handler.dispatchMessage(Handler.java:92) 04-19 11:28:32.509: E/AndroidRuntime(4409): at android.os.Looper.loop(Looper.java:130) 04-19 11:28:32.509: E/AndroidRuntime(4409): at android.app.ActivityThread.main(ActivityThread.java:3687) 04-19 11:28:32.509: E/AndroidRuntime(4409): at java.lang.reflect.Method.invokeNative(Native Method) 04-19 11:28:32.509: E/AndroidRuntime(4409): at java.lang.reflect.Method.invoke(Method.java:507) 04-19 11:28:32.509: E/AndroidRuntime(4409): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:867) 04-19 11:28:32.509: E/AndroidRuntime(4409): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:625) 04-19 11:28:32.509: E/AndroidRuntime(4409): at dalvik.system.NativeStart.main(Native Method) </code></pre> <p>But works fine while capturig in a camera without autofocus functionality.</p> <p>Below i have attached my codes</p> <p>MainActivity.java</p> <pre><code>package com.example.camerasample; import java.io.FileNotFoundException; import java.io.FileOutputStream; import java.io.IOException; import com.example.camerasample.R; import android.app.Activity; import android.content.Context; import android.hardware.Camera; import android.hardware.Camera.AutoFocusCallback; import android.hardware.Camera.PictureCallback; import android.hardware.Camera.ShutterCallback; import android.os.Bundle; import android.util.Log; import android.view.SurfaceView; import android.view.View; import android.view.View.OnClickListener; import android.view.View.OnLongClickListener; import android.view.ViewGroup.LayoutParams; import android.view.Window; import android.view.WindowManager; import android.widget.Button; import android.widget.FrameLayout; public class MainActivity extends Activity { private static final String TAG = "CamTestActivity"; Preview preview; Button buttonClick; Camera camera; String fileName; Activity act; Context ctx; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); ctx = this; act = this; requestWindowFeature(Window.FEATURE_NO_TITLE); getWindow().addFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN); setContentView(R.layout.activity_main); preview = new Preview(this, (SurfaceView)findViewById(R.id.surfaceView)); preview.setLayoutParams(new LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT)); ((FrameLayout) findViewById(R.id.preview)).addView(preview); preview.setKeepScreenOn(true); buttonClick = (Button) findViewById(R.id.buttonClick); buttonClick.setOnClickListener(new OnClickListener() { public void onClick(View v) { camera.takePicture(shutterCallback, rawCallback, jpegCallback); } }); buttonClick.setOnLongClickListener(new OnLongClickListener(){ @Override public boolean onLongClick(View arg0) { camera.autoFocus(new AutoFocusCallback(){ @Override public void onAutoFocus(boolean arg0, Camera arg1) { } }); return true; } }); } @Override protected void onResume() { super.onResume(); camera = Camera.open(); camera.startPreview(); preview.setCamera(camera); } @Override protected void onPause() { if(camera != null) { camera.stopPreview(); preview.setCamera(null); camera.release(); camera = null; } super.onPause(); } private void resetCam() { camera.startPreview(); preview.setCamera(camera); } ShutterCallback shutterCallback = new ShutterCallback() { public void onShutter() { // Log.d(TAG, "onShutter'd"); } }; PictureCallback rawCallback = new PictureCallback() { public void onPictureTaken(byte[] data, Camera camera) { // Log.d(TAG, "onPictureTaken - raw"); } }; PictureCallback jpegCallback = new PictureCallback() { public void onPictureTaken(byte[] data, Camera camera) { FileOutputStream outStream = null; try { // Write to SD Card fileName = String.format("/sdcard/camtest/%d.jpg", System.currentTimeMillis()); outStream = new FileOutputStream(fileName); outStream.write(data); outStream.close(); Log.d(TAG, "onPictureTaken - wrote bytes: " + data.length); resetCam(); } catch (FileNotFoundException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } finally { } Log.d(TAG, "onPictureTaken - jpeg"); } }; } </code></pre> <p>Preview.java</p> <pre><code>package com.example.camerasample; import java.io.IOException; import java.util.List; import android.content.Context; import android.hardware.Camera; import android.hardware.Camera.Size; import android.util.Log; import android.view.SurfaceHolder; import android.view.SurfaceView; import android.view.View; import android.view.ViewGroup; class Preview extends ViewGroup implements SurfaceHolder.Callback { private final String TAG = "Preview"; SurfaceView mSurfaceView; SurfaceHolder mHolder; Size mPreviewSize; List&lt;Size&gt; mSupportedPreviewSizes; Camera mCamera; @SuppressWarnings("deprecation") Preview(Context context, SurfaceView sv) { super(context); mSurfaceView = sv; mHolder = mSurfaceView.getHolder(); mHolder.addCallback(this); mHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS); } public void setCamera(Camera camera) { mCamera = camera; if (mCamera != null) { mSupportedPreviewSizes = mCamera.getParameters().getSupportedPreviewSizes(); requestLayout(); // get Camera parameters Camera.Parameters params = mCamera.getParameters(); List&lt;String&gt; focusModes = params.getSupportedFocusModes(); if (focusModes.contains(Camera.Parameters.FOCUS_MODE_AUTO)) { // set the focus mode params.setFocusMode(Camera.Parameters.FOCUS_MODE_AUTO); // set Camera parameters mCamera.setParameters(params); } } } @Override protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { // We purposely disregard child measurements because act as a // wrapper to a SurfaceView that centers the camera preview instead // of stretching it. final int width = resolveSize(getSuggestedMinimumWidth(), widthMeasureSpec); final int height = resolveSize(getSuggestedMinimumHeight(), heightMeasureSpec); setMeasuredDimension(width, height); if (mSupportedPreviewSizes != null) { mPreviewSize = getOptimalPreviewSize(mSupportedPreviewSizes, width, height); } } @Override protected void onLayout(boolean changed, int l, int t, int r, int b) { if (changed &amp;&amp; getChildCount() &gt; 0) { final View child = getChildAt(0); final int width = r - l; final int height = b - t; int previewWidth = width; int previewHeight = height; if (mPreviewSize != null) { previewWidth = mPreviewSize.width; previewHeight = mPreviewSize.height; } // Center the child SurfaceView within the parent. if (width * previewHeight &gt; height * previewWidth) { final int scaledChildWidth = previewWidth * height / previewHeight; child.layout((width - scaledChildWidth) / 2, 0, (width + scaledChildWidth) / 2, height); } else { final int scaledChildHeight = previewHeight * width / previewWidth; child.layout(0, (height - scaledChildHeight) / 2, width, (height + scaledChildHeight) / 2); } } } public void surfaceCreated(SurfaceHolder holder) { // The Surface has been created, acquire the camera and tell it where // to draw. try { if (mCamera != null) { mCamera.setPreviewDisplay(holder); } } catch (IOException exception) { Log.e(TAG, "IOException caused by setPreviewDisplay()", exception); } } public void surfaceDestroyed(SurfaceHolder holder) { // Surface will be destroyed when we return, so stop the preview. if (mCamera != null) { mCamera.stopPreview(); } } private Size getOptimalPreviewSize(List&lt;Size&gt; sizes, int w, int h) { final double ASPECT_TOLERANCE = 0.1; double targetRatio = (double) w / h; if (sizes == null) return null; Size optimalSize = null; double minDiff = Double.MAX_VALUE; int targetHeight = h; // Try to find an size match aspect ratio and size for (Size size : sizes) { double ratio = (double) size.width / size.height; if (Math.abs(ratio - targetRatio) &gt; ASPECT_TOLERANCE) continue; if (Math.abs(size.height - targetHeight) &lt; minDiff) { optimalSize = size; minDiff = Math.abs(size.height - targetHeight); } } // Cannot find the one match the aspect ratio, ignore the requirement if (optimalSize == null) { minDiff = Double.MAX_VALUE; for (Size size : sizes) { if (Math.abs(size.height - targetHeight) &lt; minDiff) { optimalSize = size; minDiff = Math.abs(size.height - targetHeight); } } } return optimalSize; } public void surfaceChanged(SurfaceHolder holder, int format, int w, int h) { if(mCamera != null) { Camera.Parameters parameters = mCamera.getParameters(); parameters.setPreviewSize(mPreviewSize.width, mPreviewSize.height); requestLayout(); mCamera.setParameters(parameters); mCamera.startPreview(); } } } </code></pre> <p>Manifest:</p> <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt; &lt;manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.example.camerasample" android:versionCode="1" android:versionName="1.0" &gt; &lt;uses-sdk android:minSdkVersion="8" /&gt; &lt;uses-feature android:name="android.hardware.camera" /&gt; &lt;uses-permission android:name="android.permission.CAMERA" /&gt; &lt;uses-permission android:name="android.hardware.camera.autofocus" /&gt; &lt;uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" /&gt; &lt;uses-permission android:name="android.permission.INTERNET" /&gt; &lt;uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" /&gt; &lt;application android:icon="@drawable/ic_launcher" android:label="@string/app_name" &gt; &lt;activity android:label="@string/app_name" android:name=".MainActivity" android:screenOrientation="landscape" &gt; &lt;intent-filter &gt; &lt;action android:name="android.intent.action.MAIN" /&gt; &lt;category android:name="android.intent.category.LAUNCHER" /&gt; &lt;/intent-filter&gt; &lt;/activity&gt; &lt;/application&gt; &lt;/manifest&gt; </code></pre> <p>I couldnt find exact solution anywhere, please help.</p>
 

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