Camera preview : Camera « Hardware « Android

1. Android
2. Hardware
3. Camera

Camera preview

   



<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
  android:layout_width="fill_parent"
  android:layout_height="fill_parent">
  <SurfaceView
    android:id="@+id/preview"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
  />
</RelativeLayout>


import java.util.List;

import android.app.Activity;
import android.hardware.Camera;
import android.os.Bundle;
import android.util.Log;
import android.view.SurfaceHolder;
import android.view.SurfaceView;

public class PreviewActivity extends Activity implements SurfaceHolder.Callback {

    Camera mCamera;
    SurfaceView mPreview;
    
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        
        mPreview = (SurfaceView)findViewById(R.id.preview);
        mPreview.getHolder().addCallback(this);
        mPreview.getHolder().setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
        
        mCamera = Camera.open();
    }
    
    @Override
    public void onPause() {
        super.onPause();
        mCamera.stopPreview();
    }
    
    @Override
    public void onDestroy() {
        super.onDestroy();
        mCamera.release();
    }

    @Override
    public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
        Camera.Parameters params = mCamera.getParameters();
        List<Camera.Size> sizes = params.getSupportedPreviewSizes();
        Camera.Size selected = sizes.get(0);
        params.setPreviewSize(selected.width,selected.height);
        mCamera.setParameters(params);

        mCamera.startPreview();
    }

    @Override
    public void surfaceCreated(SurfaceHolder holder) {
        try {
            mCamera.setPreviewDisplay(mPreview.getHolder());
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    @Override
    public void surfaceDestroyed(SurfaceHolder holder) {
        Log.i("PREVIEW","surfaceDestroyed");
    }
}

   
    
    
  

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