Android Dev: preview camera liscio

activity_ce_fake_reveal.xml:

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

    android:orientation="vertical"

    android:layout_width="fill_parent"

    android:layout_height="fill_parent"

    android:weightSum="1">

    <SurfaceView

        android:id="@+id/camerapreview"

        android:layout_width="fill_parent"

        android:layout_height="fill_parent" />

</LinearLayout>

Manifest:

<?xml version="1.0" encoding="utf-8"?>

<manifest xmlns:android="http://schemas.android.com/apk/res/android"

    package="com.example.marco.cefakereveal" >

    <application

        android:allowBackup="true"

        android:icon="@mipmap/ic_launcher"

        android:theme="@style/AppTheme" >

        <activity

            android:name=".CE_Fake_Reveal"

           android:label="@string/app_name" >

            <intent-filter>

                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />

            </intent-filter>

        </activity>

    </application>

    <uses-permission android:name="android.permission.CAMERA"></uses-permission>

</manifest>

CE_Fake_Reveal.java

package com.example.marco.cefakereveal;

import java.io.IOException;

import android.app.Activity;

import android.content.pm.ActivityInfo;

import android.graphics.PixelFormat;

import android.hardware.Camera;

import android.os.Bundle;

import android.view.SurfaceHolder;

import android.view.SurfaceView;

import android.view.Window;

import android.view.WindowManager;

public class CE_Fake_Reveal extends Activity implements SurfaceHolder.Callback{

    Camera camera;

    SurfaceView surfaceView;

    SurfaceHolder surfaceHolder;

    boolean previewing = false;

    /** Called when the activity is first created. */

    @Override

    public void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        requestWindowFeature(Window.FEATURE_NO_TITLE);

        getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);

        setContentView(R.layout.activity_ce__fake__reveal);

        setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);

        getWindow().setFormat(PixelFormat.UNKNOWN);

        surfaceView = (SurfaceView)findViewById(R.id.camerapreview);

        surfaceHolder = surfaceView.getHolder();

        surfaceHolder.addCallback(this);

     //   surfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);

    }

    @Override

    public void surfaceChanged(SurfaceHolder holder, int format, int width,

                               int height) {

// TODO Auto-generated method stub

        if(previewing){

            camera.stopPreview();

            previewing = false;

        }

        if (camera != null){

            try {

                camera.setPreviewDisplay(surfaceHolder);

                Camera.Parameters parameters = camera.getParameters();

                parameters.setFocusMode(Camera.Parameters.FOCUS_MODE_CONTINUOUS_PICTURE);

                camera.setParameters(parameters);

                camera.startPreview();

                previewing = true;

            } catch (IOException e) {

                // TODO Auto-generated catch block

                e.printStackTrace();

            }

        }

    }

    @Override

    public void surfaceCreated(SurfaceHolder holder) {

// TODO Auto-generated method stub

        camera = Camera.open();

    }

    @Override

    public void surfaceDestroyed(SurfaceHolder holder) {

// TODO Auto-generated method stub

        camera.stopPreview();

        camera.release();

        camera = null;

        previewing = false;

    }

}