Android相机代码
我正在试图制作一款使用相机的Android应用程序。 但不知何故这个代码不起作用。 任何帮助将不胜感激。 提前致谢。
这是我的应用程序的代码。
aractivity.java package com.tanuj.myarapp;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.Bundle;
import android.app.Activity;
import android.hardware.Camera;
import android.hardware.Sensor;
import android.hardware.SensorEvent;
import android.hardware.SensorEventListener;
import android.hardware.SensorManager;
import android.util.Log;
import android.view.Menu;
import android.view.MenuItem;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.support.v4.app.NavUtils;
public class Aractivity extends Activity {
SurfaceView cameraPreview;
SurfaceHolder previewHolder;
Camera camera;
boolean inPreview;
final static String TAG = "PAAR";
SensorManager sensorManager;
int orientationSensor;
int accelerometerSensor;
float headingAngle;
float pitchAngle;
float rollAngle;
float xAxis;
float yAxis;
float zAxis;
LocationManager locationManager;
double latitude;
double longitude;
double altitude;
final SensorEventListener sensorEventListener = new SensorEventListener() {
public void onSensorChanged(SensorEvent sensorEvent) {
if (sensorEvent.sensor.getType() == Sensor.TYPE_ORIENTATION)
{
headingAngle = sensorEvent.values[0];
pitchAngle = sensorEvent.values[1];
rollAngle = sensorEvent.values[2];
Log.d(TAG, "Heading: " + String.valueOf(headingAngle));
Log.d(TAG, "Pitch: " + String.valueOf(pitchAngle));
Log.d(TAG, "Roll: " + String.valueOf(rollAngle));
}
else if (sensorEvent.sensor.getType() == Sensor.TYPE_ACCELEROMETER)
{
xAxis = sensorEvent.values[0];
yAxis = sensorEvent.values[1];
zAxis = sensorEvent.values[2];
Log.d(TAG, "X Axis: " + String.valueOf(xAxis));
Log.d(TAG, "Y Axis: " + String.valueOf(yAxis));
Log.d(TAG, "Z Axis: " + String.valueOf(zAxis));
}
}
public void onAccuracyChanged (Sensor senor, int accuracy) {
//Not used
}
};
LocationListener locationListener = new LocationListener() {
public void onLocationChanged(Location location) {
latitude = location.getLatitude();
longitude = location.getLongitude();
altitude = location.getAltitude();
Log.d(TAG, "Latitude: " + String.valueOf(latitude));
Log.d(TAG, "Longitude: " + String.valueOf(longitude));
Log.d(TAG, "Altitude: " + String.valueOf(altitude));
}
public void onProviderDisabled(String arg0) {
// TODO Auto-generated method stub
}
public void onProviderEnabled(String arg0) {
// TODO Auto-generated method stub
}
public void onStatusChanged(String arg0, int arg1, Bundle arg2) {
// TODO Auto-generated method stub
}
};
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_aractivity);
inPreview = false;
cameraPreview = (SurfaceView)findViewById(R.id.cameraPreview);
previewHolder = cameraPreview.getHolder();
previewHolder.addCallback(surfaceCallback);
previewHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
sensorManager = (SensorManager) getSystemService(SENSOR_SERVICE);
orientationSensor = Sensor.TYPE_ORIENTATION;
accelerometerSensor = Sensor.TYPE_ACCELEROMETER;
sensorManager.registerListener(sensorEventListener,
sensorManager.getDefaultSensor(orientationSensor),
SensorManager.SENSOR_DELAY_NORMAL);
sensorManager.registerListener(sensorEventListener, sensorManager
.getDefaultSensor(accelerometerSensor), SensorManager.SENSOR_DELAY_NORMAL);
locationManager = (LocationManager) getSystemService(LOCATION_SERVICE);
locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 2000, 2,
locationListener);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.activity_aractivity, menu);
return true;
}
@Override
public void onResume() {
super.onResume();
locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 2000,
2, locationListener);
sensorManager.registerListener(sensorEventListener, sensorManager
.getDefaultSensor(orientationSensor), SensorManager.SENSOR_DELAY_NORMAL);
sensorManager.registerListener(sensorEventListener, sensorManager
.getDefaultSensor(accelerometerSensor), SensorManager.SENSOR_DELAY_NORMAL);
camera=Camera.open();
}
@Override
public void onPause() {
if (inPreview) {
camera.stopPreview();
}
locationManager.removeUpdates(locationListener);
sensorManager.unregisterListener(sensorEventListener);
camera.release();
camera=null;
inPreview=false;
super.onPause();
}
SurfaceHolder.Callback surfaceCallback=new SurfaceHolder.Callback() {
public void surfaceCreated(SurfaceHolder holder) {
try {
camera.setPreviewDisplay(previewHolder);
}
catch (Throwable t) {
Log.e("ProAndroidAR2Activity", "Exception i");
}
}
public void surfaceChanged(SurfaceHolder holder, int format, int width, int
height) {
Camera.Parameters parameters=camera.getParameters();
Camera.Size size=getBestPreviewSize(width, height, parameters);
if (size!=null) {
parameters.setPreviewSize(size.width, size.height);
camera.setParameters(parameters);
camera.startPreview();
inPreview=true;
}
}
public void surfaceDestroyed(SurfaceHolder holder) {
/*camera.stopPreview();
camera.release();
camera=null;
*/
}
};
private Camera.Size getBestPreviewSize(int width, int height,
Camera.Parameters parameters) {
Camera.Size result=null;
for (Camera.Size size : parameters.getSupportedPreviewSizes()) {
if (size.width<=width && size.height<=height) {
if (result==null) {
result=size;
}
else {
int resultArea=result.width*result.height;
int newArea=size.width*size.height;
if (newArea>resultArea) {
result=size;
}
}
}
}
return(result);
}
}
清单文件<manifest xmlns：android =“http://schemas.android.com/apk/res/android”package =“com.tanuj.myarapp”android：versionCode =“1”android：versionName =“1.0”>
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="15" />
<application
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name=".Aractivity"
android:label="@string/title_activity_aractivity"
android:screenOrientation = "landscape"
android:configChanges = "keyboardHidden|orientation"
>
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
<uses-feature android:name="android.hardware.camera" />
<uses-permission android:name="android.permission.CAMERA" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
</manifest>
activity_aractivity.xml（布局）
<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.view.SurfaceView
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/cameraPreview"
android:layout_width="fill_parent"
android:layout_height="fill_parent" >
</android.view.SurfaceView>
</RelativeLayout>
output of logcat
'11-10 17:56:04.153: W/IInputConnectionWrapper(386): showStatusIcon on inactive InputConnection
11-10 17:56:16.732: D/er(386): in open()
11-10 17:56:17.442: D/er(386): inOnresune'
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