There is a code that is to turn on the flash when you press the button, this is why it is not happening. Help me understand why this is not happening, please. Tested the application on samsung galaxy nexus and lg p970.
Activity:
package com.example.Flashlight;
import android.app.Activity;
import android.app.AlertDialog;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.DialogInterface;
import android.content.pm.PackageManager;
import android.hardware.Camera;
import android.hardware.Camera.Parameters;
import android.util.Log;
import android.view.View;
import android.widget.*;
public class MainActivity extends Activity {
Camera camera;
boolean isFlashOn;
boolean hasFlash;
Parameters params;
Button flashlightButton;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
checkFlashlight();
getCamera();
initFlashlightButton();
}
void checkFlashlight() {
hasFlash = getApplicationContext().getPackageManager()
.hasSystemFeature(PackageManager.FEATURE_CAMERA_FLASH);
if (!hasFlash) {
AlertDialog alert = new AlertDialog.Builder(
MainActivity.this).create(); alert.setTitle("Error");
alert.setMessage("Sorry, your device doesn't support flash light!");
alert.setButton("OK", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
finish();
}
});
alert.show();
return;
}
}
// initialization button and click listener
private void initFlashlightButton() {
flashlightButton = (Button) findViewById(R.id.flash_light);
flashlightButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
if (isFlashOn) turnOffFlash();
else turnOnFlash();
}
});
}
private void getCamera() {
if (camera == null) {
try {
camera = Camera.open();
params = camera.getParameters();
} catch (RuntimeException e) {
Log.e("Camera Error. Failed to Open. Error: ", e.getMessage());
}
}
}
// here must be of the flash (it is not clear why this is not happening)
private void turnOnFlash() {
if (!isFlashOn) {
if (camera == null || params == null) return;
params = camera.getParameters();
params.setFlashMode(Parameters.FLASH_MODE_TORCH);
camera.setParameters(params);
camera.startPreview();
isFlashOn = true;
}
}
// flash OFF
private void turnOffFlash() {
if (isFlashOn) {
if (camera == null || params == null) return;
params = camera.getParameters();
params.setFlashMode(Parameters.FLASH_MODE_OFF);
camera.setParameters(params);
camera.stopPreview();
isFlashOn = false;
}
}
Layout:
<?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_height="match_parent" android:layout_width="match_parent">
<Button
android:id="#+id/flash_light"
android:layout_height="wrap_content"
android:layout_width="wrap_content"
android:layout_centerHorizontal="true"
android:layout_centerVertical="true"
android:text="Flashlight"/>
</RelativeLayout>
Manifest:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.Flashlight"
android:versionCode="1"
android:versionName="1.0">
<uses-permission android:name="android.permission.CAMERA" />
<uses-feature android:name="android.hardware.camera" />
<uses-sdk android:minSdkVersion="8"/>
<application android:label="#string/app_name" android:icon="#drawable/ic_launcher">
<activity android:name=".MainActivity"
android:label="#string/app_name"
android:theme="#android:style/Theme.Black">
<intent-filter>
<action android:name="android.intent.action.MAIN"/>
<category android:name="android.intent.category.LAUNCHER"/>
</intent-filter>
</activity>
</application>
</manifest>
To turn on the Camera :
camera = Camera.open();
Parameters p = camera.getParameters();
p.setFlashMode(Parameters.FLASH_MODE_TORCH);
camera.setParameters(p);
camera.startPreview();
To turn off the Camera :
camera = Camera.open();
Parameters p = camera.getParameters();
p.setFlashMode(Parameters.FLASH_MODE_OFF);
camera.setParameters(p);
camera.stopPreview();
Also you'll need to put that in your manifest :
<uses-permission android:name="android.permission.CAMERA" />
<uses-feature android:name="android.hardware.camera" />
Try adding this to your manifest:
<uses-feature android:name="android.hardware.camera.flash" />
<uses-permission android:name="android.permission.FLASHLIGHT" />
Related
If i give permission manually than it works. Rather than that it doesn't work. Can any one help me. What change should i made. I am new to android development. I can't find anything on google.
Manifest:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.plutianclub.flashlight">
<uses-permission android:name="android.permission.CAMERA" />
<uses-permission android:name="android.permission.FLASHLIGHT" />
<uses-feature android:name="android.hardware.camera" />
<uses-feature android:name="android.hardware.camera.flash" />
<application
android:allowBackup="true"
android:icon="#mipmap/ic_flashlight_launcher"
android:label="#string/app_name"
android:roundIcon="#mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="#style/AppTheme">
<activity android:name=".MainActivity"
android:screenOrientation="portrait">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
Main Activity:
package com.plutianclub.flashlight;
import android.content.DialogInterface;
import android.content.pm.PackageManager;
import android.hardware.Camera;
import android.os.Bundle;
import android.support.v7.app.AlertDialog;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.ImageButton;
public class MainActivity extends AppCompatActivity {
ImageButton imageButton;
Camera camera;
Camera.Parameters parameters;
boolean isFlash = false;
boolean isOn = false;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
imageButton = (ImageButton) findViewById(R.id.offButton);
if (getApplicationContext().getPackageManager().hasSystemFeature(PackageManager.FEATURE_CAMERA_FLASH)){
camera = Camera.open();
parameters = camera.getParameters();
isFlash = true;
}
imageButton.setOnClickListener(new View.OnClickListener(){
#Override
public void onClick(View v) {
if (isFlash == true){
if (isOn == false ){
imageButton.setImageResource(R.drawable.on);
parameters.setFlashMode(Camera.Parameters.FLASH_MODE_TORCH);
camera.setParameters(parameters);
camera.startPreview();
isOn = true;
}else {
imageButton.setImageResource(R.drawable.off);
parameters.setFlashMode(Camera.Parameters.FLASH_MODE_OFF);
camera.setParameters(parameters);
camera.stopPreview();
isOn = false;
}
}else {
AlertDialog.Builder builder = new AlertDialog.Builder(MainActivity.this);
builder.setTitle("Error....");
builder.setMessage("Flashlight is not avilable on this device.");
builder.setPositiveButton("Ok", new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialog, int which) {
dialog.dismiss();
finish();
}
});
AlertDialog alertDialog = builder.create();
alertDialog.show();
}
}
});
}
#Override
protected void onStop() {
super.onStop();
if (camera != null){
camera.release();
camera = null;
}
}
}
From Android 6.0 (Marshmallow) Android requires that you ask permission by code at runtime or at the time when the feature are gonna be used.
There are more about here with examples. https://developer.android.com/training/permissions/requesting.html
Anything below Android 6.0 will just require as you already have done it in the manifest
I tried to set an Android camera preview on my Activity but failed. There's nothing but black screen on my surface View. Seems to be too simple for others but I still cannot figure it out.
Here's my code:
package com.example.peterchen.camerapreviewexample;
import android.hardware.Camera;
import android.graphics.PixelFormat;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import java.io.IOException;
public class MainActivity extends AppCompatActivity implements SurfaceHolder.Callback {
Camera myCamera;
SurfaceView previewSurfaceView;
SurfaceHolder previewSurfaceHolder;
/** Called when the activity is first created. */
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
previewSurfaceView = (SurfaceView)findViewById(R.id.surfaceView);
previewSurfaceHolder = previewSurfaceView.getHolder();
previewSurfaceHolder.addCallback(this);
previewSurfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
}
#Override
public void onResume() {
super.onResume();
myCamera.open();
myCamera.startPreview();
}
#Override
public void onPause() {
myCamera.stopPreview();
myCamera.release();
myCamera=null;
super.onPause();
}
#Override
public void surfaceCreated(SurfaceHolder holder) {}
#Override
public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {}
#Override
public void surfaceDestroyed(SurfaceHolder holder) {}
}
my layout xml:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="#dimen/activity_vertical_margin"
android:paddingLeft="#dimen/activity_horizontal_margin"
android:paddingRight="#dimen/activity_horizontal_margin"
android:paddingTop="#dimen/activity_vertical_margin"
tools:context="com.example.peterchen.camerapreviewexample.MainActivity">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Hello World!"
android:id="#+id/textView" />
<SurfaceView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="#+id/surfaceView"
android:layout_alignParentRight="true"
android:layout_below="#+id/textView"
android:layout_alignParentLeft="true"
android:layout_alignParentBottom="true" />
</RelativeLayout>
and my manifest xml:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.peterchen.camerapreviewexample">
<application
android:allowBackup="true"
android:icon="#mipmap/ic_launcher"
android:label="#string/app_name"
android:supportsRtl="true"
android:theme="#style/AppTheme">
<activity android:name=".MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
<uses-sdk android:minSdkVersion="7" />
<uses-permission android:name="android.permission.CAMERA"></uses-permission>
Great thanks to all of you guys.
You can try to below code
main.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_weight="1"
android:gravity="center"
android:orientation="vertical" >
<SurfaceView
android:id="#+id/surfaceview"
android:layout_width="fill_parent"
android:layout_height="wrap_content" />
</LinearLayout>
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:weightSum="1" >
<Button
android:id="#+id/startcamerapreview"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="0.5"
android:text="Show Preview" />
<Button
android:id="#+id/stopcamerapreview"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="0.5"
android:text="Stop Preview" />
</LinearLayout>
</LinearLayout>
AndroidCamera.java
import android.app.Activity;
import android.hardware.Camera;
import android.os.Bundle;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
public class AndroidCamera extends Activity implements SurfaceHolder.Callback
{
Camera camera;
SurfaceView surfaceView;
SurfaceHolder surfaceHolder;
Button buttonStartCameraPreview, buttonStopCameraPreview;
boolean previewing = false;
/** Called when the activity is first created. */
#Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
buttonStartCameraPreview = (Button) findViewById(R.id.startcamerapreview);
buttonStopCameraPreview = (Button) findViewById(R.id.stopcamerapreview);
surfaceView = (SurfaceView) findViewById(R.id.surfaceview);
surfaceHolder = surfaceView.getHolder();
surfaceHolder.addCallback(this);
surfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
buttonStartCameraPreview.setOnClickListener(new OnClickListener()
{
#Override
public void onClick(View v)
{
// TODO Auto-generated method stub
if (!previewing)
{
camera = Camera.open();
if (camera != null)
{
try
{
camera.setPreviewDisplay(surfaceHolder);
camera.startPreview();
previewing = true;
} catch (IOException e)
{
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
}
});
buttonStopCameraPreview.setOnClickListener(new OnClickListener()
{
#Override
public void onClick(View v)
{
// TODO Auto-generated method stub
if (camera != null && previewing)
{
camera.stopPreview();
camera.release();
camera = null;
previewing = false;
}
}
});
}
#Override
public void surfaceChanged(SurfaceHolder holder, int format, int width, int height)
{
// TODO Auto-generated method stub
}
#Override
public void surfaceCreated(SurfaceHolder holder)
{
// TODO Auto-generated method stub
}
#Override
public void surfaceDestroyed(SurfaceHolder holder)
{
// TODO Auto-generated method stub
}
}
AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.camera.preview"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk android:minSdkVersion="8" />
<uses-permission android:name="android.permission.CAMERA" >
</uses-permission>
<application
android:icon="#drawable/ic_launcher"
android:label="#string/app_name" >
<activity
android:name=".AndroidCamera"
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>
</manifest>
Replace "AndroidCamera.java" your 90 Degree Screen Rotate Problem Solve
import android.app.Activity;
import android.hardware.Camera;
import android.os.Bundle;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
public class AndroidCamera extends Activity implements SurfaceHolder.Callback
{
Camera camera;
SurfaceView surfaceView;
SurfaceHolder surfaceHolder;
Button buttonStartCameraPreview, buttonStopCameraPreview;
boolean previewing = false;
/** Called when the activity is first created. */
#Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
buttonStartCameraPreview = (Button) findViewById(R.id.startcamerapreview);
buttonStopCameraPreview = (Button) findViewById(R.id.stopcamerapreview);
surfaceView = (SurfaceView) findViewById(R.id.surfaceview);
surfaceHolder = surfaceView.getHolder();
surfaceHolder.addCallback(this);
surfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
buttonStartCameraPreview.setOnClickListener(new OnClickListener()
{
#Override
public void onClick(View v)
{
// TODO Auto-generated method stub
if (!previewing)
{
camera = Camera.open();
if (camera != null)
{
try
{
camera.setDisplayOrientation(90);
camera.setPreviewDisplay(surfaceHolder);
camera.startPreview();
previewing = true;
} catch (IOException e)
{
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
}
});
buttonStopCameraPreview.setOnClickListener(new OnClickListener()
{
#Override
public void onClick(View v)
{
// TODO Auto-generated method stub
if (camera != null && previewing)
{
camera.stopPreview();
camera.release();
camera = null;
previewing = false;
}
}
});
}
#Override
public void surfaceChanged(SurfaceHolder holder, int format, int width, int height)
{
// TODO Auto-generated method stub
}
#Override
public void surfaceCreated(SurfaceHolder holder)
{
// TODO Auto-generated method stub
}
#Override
public void surfaceDestroyed(SurfaceHolder holder)
{
// TODO Auto-generated method stub
}
}
I'm new to Android Application Development, I was trying to build a basic Flashlight app but seems like most of the libraries are deprecated. I have tried doing Camera.Parameters camera; but still not working. Log shows the Exception : Caused by: java.lang.RuntimeException: Fail to connect to camera service.AndroidManifest.xml
<uses-permission android:name="android.permission.CAMERA"/>
<uses-feature android:name="android.hardware.camera" />
<uses-feature android:name="android.hardware.camera.autofocus"/>
MainActivity.java
package com.thenewboston.flashlight;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.content.pm.PackageManager;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.ImageButton;
import android.hardware.Camera.Parameters;
public class MainActivity extends AppCompatActivity {
private android.hardware.Camera camera = null;
Parameters params;
Boolean isOn;
ImageButton imageButton;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
imageButton = (ImageButton) findViewById(R.id.imageButton);
Boolean isCameraFlash = getApplication().getPackageManager()
.hasSystemFeature(PackageManager.FEATURE_CAMERA);
if(!isCameraFlash)
showNoCameraAlert();
else{
camera = android.hardware.Camera.open();
params = camera.getParameters();
}
}
private void showNoCameraAlert() {
new AlertDialog.Builder(this)
.setTitle("Error")
.setMessage("Sorry, your device doesn't support flash light!")
.setNeutralButton("OK", new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialog, int which) {
finish();
}
})
.show();
}
public void myButton(View view){
if (isOn){
setFlashOff();
}
else {
setFlashOn();
}
}
private void setFlashOn() {
params = camera.getParameters();
params.setFlashMode(Parameters.FLASH_MODE_TORCH);
camera.setParameters(params);
camera.startPreview();
isOn = true;
}
private void setFlashOff() {
params.setFlashMode(Parameters.FLASH_MODE_OFF);
camera.setParameters(params);
camera.stopPreview();
isOn = false;
}
#Override
protected void onStop() {
super.onStop();
if(camera != null){
camera.release();
camera = null;
}
}
}
activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="#dimen/activity_vertical_margin"
android:paddingLeft="#dimen/activity_horizontal_margin"
android:paddingRight="#dimen/activity_horizontal_margin"
android:paddingTop="#dimen/activity_vertical_margin"
tools:context="com.thenewboston.flashlight.MainActivity"
android:background="#000000">
<ImageButton
android:layout_width="150dp"
android:layout_height="150dp"
android:id="#+id/imageButton"
android:layout_centerVertical="true"
android:layout_centerHorizontal="true"
android:src="#drawable/mytoggle"
android:scaleType="fitCenter"
android:background="#null"
android:onClick="myButton" />
</RelativeLayout>
I know, I'm using outdated stuff in my code, but that's probably because I have not seen anyone building flashlight app for Marshmallow. If anyone can suggest new code it will be helpful or correct my code(given above) will be thankful.
I try to display camera preview on a surface. but it just display black surface. What should I do ? I put the code below
Thanks for your help
import android.graphics.PixelFormat;
import android.hardware.Camera;
import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import java.io.IOException;
public class MainActivity extends ActionBarActivity implements SurfaceHolder.Callback {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
getWindow().setFormat(PixelFormat.UNKNOWN);
SurfaceView surfaceView = (SurfaceView) findViewById(R.id.surfaceView);
SurfaceHolder surfaceHolder = surfaceView.getHolder();
surfaceHolder.addCallback(this);
surfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
Camera camera = Camera.open();
try {
camera.setPreviewDisplay(surfaceHolder);
camera.startPreview();
} catch (IOException e) {
e.printStackTrace();
}
}
#Override
public void surfaceCreated(SurfaceHolder holder) {
}
#Override
public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
}
#Override
public void surfaceDestroyed(SurfaceHolder holder) {
}
}
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent"
android:layout_height="match_parent" android:paddingLeft="#dimen/activity_horizontal_margin"
android:paddingRight="#dimen/activity_horizontal_margin"
android:paddingTop="#dimen/activity_vertical_margin"
android:paddingBottom="#dimen/activity_vertical_margin" tools:context=".MainActivity">
<SurfaceView
android:id="#+id/surfaceView"
android:layout_width="match_parent"
android:layout_height="match_parent" />
</RelativeLayout>
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="test.frontcamerateststartup" >
<uses-permission android:name="android.permission.CAMERA"/>
<application
android:allowBackup="true"
android:icon="#drawable/ic_launcher"
android:label="#string/app_name"
android:theme="#style/AppTheme" >
<activity
android:name=".MainActivity"
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>
</manifest>
............................................................................................................................................................................
put the following code in surfaceCreated()
try {
camera.setPreviewDisplay(surfaceHolder);
camera.startPreview();
} catch (IOException e) {
e.printStackTrace();
}
The surface needs to be setup before use
I'm following this tutorial to learn Android's Camera API. I made it the end of the first section (right before "Providing an overlay" begins), and I'm getting the following error:
06-20 23:33:50.903: ERROR/AndroidRuntime(1114): at android.hardware.Camera.startPreview(Native Method)
06-20 23:33:50.903: ERROR/AndroidRuntime(1114): at com.sobel.Sobel.startCamera(Sobel.java:73)
06-20 23:33:50.903: ERROR/AndroidRuntime(1114): at com.sobel.Sobel.surfaceChanged(Sobel.java:36)
(Full trace)
Git repo here. Main Activity here. Manifest here.
I checked and re-checked my code and have followed the tutorial to a t, so what could be causing this error?
Try setting the type of Surface in initCamera().
private void initCamera() {
mCamSV = (SurfaceView)findViewById(R.id.surface_camera);
mCamSH = mCamSV.getHolder();
mCamSH.addCallback(this);
**mCamSH.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);**
}
EDIT 1
I am copying all the files here which worked for me with android 2.2 sdk
Activity
package com.stack.camera;
import java.io.IOException;
import android.app.Activity;
import android.hardware.Camera;
import android.os.Bundle;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.view.WindowManager;
import android.widget.FrameLayout;
public class CameraStackActivity extends Activity implements SurfaceHolder.Callback {
private Camera mCam;
private SurfaceView mCamSV;
private SurfaceHolder mCamSH;
/** Called when the activity is first created. */
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
WindowManager.LayoutParams.FLAG_FULLSCREEN);
setContentView(R.layout.main);
initCamera();
}
#Override
public void onDestroy() {
stopCamera();
}
public void surfaceChanged(SurfaceHolder holder, int format, int width,
int height) {
startCamera(holder, width, height);
}
public void surfaceCreated(SurfaceHolder holder) {
// TODO Auto-generated method stub
mCam = Camera.open();
try {
mCam.setPreviewDisplay(holder);
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
public void surfaceDestroyed(SurfaceHolder holder) {
// TODO Auto-generated method stub
}
private void initCamera() {
mCamSV = (SurfaceView)findViewById(R.id.surface_camera);
mCamSH = mCamSV.getHolder();
mCamSH.addCallback(this);
mCamSH.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
}
private void startCamera(SurfaceHolder sh, int width, int height) {
Camera.Parameters p = mCam.getParameters();
// Camera.Size s = p.getSupportedPreviewSizes().get(0);
p.setPreviewSize(width, height);
mCam.setParameters(p);
try {
mCam.setPreviewDisplay(sh);
} catch (Exception e) {
}
mCam.startPreview();
}
private void stopCamera() {
mCamSH.removeCallback(this);
mCam.stopPreview();
mCam.release();
}
}
Layout
<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="fill_parent"
android:layout_height="fill_parent">
<SurfaceView android:id="#+id/surface_camera"
android:layout_width="fill_parent" android:layout_height="fill_parent" />
</FrameLayout>
Manifest File
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.stack.camera"
android:versionCode="1"
android:versionName="1.0">
<uses-permission android:name="android.permission.CAMERA" />
<uses-feature android:name="android.hardware.camera" />
<uses-feature android:name="android.hardware.camera.autofocus" />
<application android:icon="#drawable/icon" android:label="#string/app_name">
<activity android:name="CameraStackActivity"
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>
</manifest>
Check if it still doesnt work out for you.