AutoFocusCallback.java

package com.wisedu.scc.love.widget.qrcode.camera;

import android.hardware.Camera;
import android.os.Handler;
import android.os.Message;
import android.util.Log;

/**
 * 自动对焦回调函数
 */
final class AutoFocusCallback implements Camera.AutoFocusCallback {

    private static final String TAG = AutoFocusCallback.class.getSimpleName();
    private static final long AUTO_FOCUS_INTERVAL_MS = 1500L;

    private Handler autoFocusHandler;
    private int autoFocusMessage;

    /**
     * 设置处理器
     * @param autoFocusHandler
     * @param autoFocusMessage
     */
    void setHandler(Handler autoFocusHandler, int autoFocusMessage) {
        this.autoFocusHandler = autoFocusHandler;
        this.autoFocusMessage = autoFocusMessage;
    }

    /**
     * 自动对焦完成
     * @param success
     * @param camera
     */
    public void onAutoFocus(boolean success, Camera camera) {
        if (autoFocusHandler != null) {
            Message message = autoFocusHandler.obtainMessage(autoFocusMessage, success);
            autoFocusHandler.sendMessageDelayed(message, AUTO_FOCUS_INTERVAL_MS);
            autoFocusHandler = null;
        } else {
            Log.d(TAG, "Got auto-focus callback, but no handler for it");
        }
    }

}