Android custom cameras implement autofocus and manual focus:
The system camera is not called because the interface presented by different machines that open the camera is not unified and cannot meet the needs.
Therefore, in order to make the program present a unified interface on different machines and be laid out according to needs, this demo was made.
The program implementation code is as follows:
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@SuppressWarnings("deprecation")
public class PhotographActivity extends BaseActivity implements OnClickListener, {
private SurfaceView surfaceView;
private Camera camera;
private parameters;
private Button btn_goback, btn_takephoto;
private SurfaceHolder surfaceHolder;
@Override
protected void onDestroy() {
();
if(camera != null){
();
();
camera = null;
}
}
@Override
protected void onCreate(Bundle savedInstanceState) {
(savedInstanceState);
setContentView(.classes_activity_takephoto);
initView();
}
@Override
protected void onResume() {
();
initCamera();
}
private void initView(){
btn_goback = (Button) findViewById(.btn_goback);
btn_goback.setOnClickListener(this);
btn_takephoto = (Button) findViewById(.btn_takephoto);
btn_takephoto.setOnClickListener(this);
surfaceView = (SurfaceView) findViewById();
(true);
(this);
(TRIM_MEMORY_BACKGROUND);
surfaceHolder = ();
(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
(true);
(400, 300);
(this);
}
@Override
public void surfaceDestroyed(SurfaceHolder holder) {
// TODO Auto-generated method stub
();
();
camera = null;
}
@Override
public void surfaceCreated(SurfaceHolder holder) {
// TODO Auto-generated method stub
try {
(surfaceHolder);
} catch (IOException e) {
();
}
}
@Override
public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
// Implement autofocus (new AutoFocusCallback() {
@Override
public void onAutoFocus(boolean success, Camera camera) {
if (success) {
();// Only by adding this sentence will it be automatically focused doAutoFocus();
}
}
});
}
// Initialization settings of camera parameters private void initCamera() {
if (null == camera) {
camera = ();
}
parameters = ();
();
(Parameters.FLASH_MODE_TORCH);
if (!("KORIDY H30")) {
(.FOCUS_MODE_CONTINUOUS_PICTURE);// 1 Continuous focus }else{
(.FOCUS_MODE_AUTO);
}
(parameters);
setDispaly(camera);
();
();// 2 If you want to achieve continuous autofocus, this sentence must be added }
// Control the correct display direction of the image private void setDispaly(Camera camera) {
if (() >= 8) {
setDisplayOrientation(camera, -90);
} else {
(-90);
}
}
// The correct display of the image implemented private void setDisplayOrientation(Camera camera, int i) {
Method downPolymorphic;
try {
downPolymorphic = ().getMethod("setDisplayOrientation", new Class[] { });
if (downPolymorphic != null) {
(camera, new Object[] { i });
}
} catch (Exception e) {
("Came_e", "Image error");
}
}
@Override
public void onClick(View v) {
switch (()) {
case :
doAutoFocus();
break;
case .btn_takephoto:
takePicture();
break;
case .btn_goback:
finish();
break;
default:
break;
}
}
// handle button auto focus
private void doAutoFocus() {
parameters = ();
(.FOCUS_MODE_AUTO);
(parameters);
(new AutoFocusCallback() {
@Override
public void onAutoFocus(boolean success, Camera camera) {
if (success) {
();// Only by adding this sentence will it be automatically focused. if (!("KORIDY H30")) {
parameters = ();
(.FOCUS_MODE_CONTINUOUS_PICTURE);// 1 Continuous focus (parameters);
}else{
parameters = ();
(.FOCUS_MODE_AUTO);
(parameters);
}
}
}
});
}
private void takePicture() {
(shutterCallback, rawCallback, jpegCallback);
}
// define shutterCallback
ShutterCallback shutterCallback = new ShutterCallback() {
public void onShutter() {
// TODO Do something when the shutter closes.
}
};
PictureCallback rawCallback = new PictureCallback() {
public void onPictureTaken(byte[] data, Camera camera) {
// TODO Do something with the image RAW data.
}
};
// stroe the picture in format jpeg
PictureCallback jpegCallback = new PictureCallback() {
public void onPictureTaken(byte[] data, Camera camera) {
// Save the image JPEG data to the SD card
FileOutputStream outStream = null;
try {
//Modify the image path and name String tempFilename = (()) + ".jpg";
File folder = Constants.CACHE_FOLDER;
if (!()) {
();
}
String path = Constants.CACHE_FOLDER + + tempFilename;
outStream = new FileOutputStream(path);
(data);
();
();
(new BitmapDrawable((data, 0, )));
} catch (FileNotFoundException e) {
("TAG", "File Note Found", e);
} catch (IOException e) {
("TAG", "IO Exception", e);
}
}
};
}
The code for classes_activity_takephoto.xml is as follows:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:andro
android:layout_width="match_parent"
android:layout_height="match_parent" >
<SurfaceView
android:
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_alignParentLeft="true"
android:layout_toLeftOf="@+id/rlright" />
<LinearLayout
android:
android:layout_width="40dp"
android:layout_height="match_parent"
android:layout_alignParentRight="true"
android:background="#2b2b2b"
android:gravity="center_horizontal"
android:orientation="vertical" >
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="0dip"
android:layout_weight="1"
android:gravity="center" >
<Button
android:
style="@style/PETextButton"
android:text="return"/>
</LinearLayout>
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="0dip"
android:layout_weight="1"
android:gravity="center" >
<Button
android:
style="@style/PETextButton"
android:text="Photograph" />
</LinearLayout>
</LinearLayout>
</RelativeLayout>
The corresponding permissions need to be added in the manifest file:
<uses-permission android:name=""/> <uses-feature android:name=""/> <uses-feature android:name=""/>
The above is all the content of this article. I hope it will be helpful to everyone's study and I hope everyone will support me more.