相关疑难解决方法(0)

我正在尝试从Android相机读取焦距(照片中的主体距离).即使正确自动对焦,我的HTC Desire上的所有焦距仍然保持为0.这是整个应用程序,仅适用于v2.3.3及更高版本.

ImageCapture.java

package test.test;

import java.io.IOException;
import java.io.OutputStream;
import java.text.SimpleDateFormat;

import android.app.Activity;
import android.content.Intent;
import android.graphics.PixelFormat;
import android.hardware.Camera;
import android.hardware.Camera.AutoFocusCallback;
import android.hardware.Camera.PictureCallback;
import android.net.Uri;
import android.os.Bundle;
import android.provider.MediaStore.Images.Media;
import android.util.Log;
import android.view.KeyEvent;
import android.view.MenuItem;
import android.view.SurfaceHolder;
import android.view.SurfaceView;

//THIS CLASS READS THE FOCUS DISTANCES
class ImageFocusCallback implements AutoFocusCallback {
    @Override
    public void onAutoFocus(boolean success, Camera camera) {
        //READ FOCUS DISTANCES HERE
        Camera.Parameters parameters = camera.getParameters();
        float[] distances = new float[3];
        if (success) {
            // Only available with Android 9 …