Question

我的要求是：

浏览图库中的图片
识别从图库中挑选的图像上的条形码及其类型。

截至目前，我尝试使用以下代码从图库中获取图像并且工作正常，但在获得图像后，我究竟应该如何进行？

请帮帮我。提前致谢，洁

package com.example.testapp;

import android.app.Activity;
import android.content.Intent;
import android.database.Cursor;
import android.net.Uri;
import android.os.Bundle;
import android.provider.MediaStore;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;

public class BrowsePictureActivity extends Activity {

// this is the action code we use in our intent, 
// this way we know we're looking at the response from our own action
private static final int SELECT_PICTURE = 1;

private String selectedImagePath;

public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_browse_picture);

    ((Button) findViewById(R.id.Button01))
            .setOnClickListener(new OnClickListener() {

                public void onClick(View arg0) {

                    // in onCreate or any event where your want the user to
                    // select a file
                    Intent intent = new Intent();
                    intent.setType("image/*");
                    intent.setAction(Intent.ACTION_GET_CONTENT);
                    startActivityForResult(Intent.createChooser(intent,
                            "Select Picture"), SELECT_PICTURE);
                }
            });
}

public void onActivityResult(int requestCode, int resultCode, Intent data) {
    if (resultCode == RESULT_OK) {
        if (requestCode == SELECT_PICTURE) {
            Uri selectedImageUri = data.getData();
            selectedImagePath = getPath(selectedImageUri);
        }
    }
}

/**
 * helper to retrieve the path of an image URI
 */
public String getPath(Uri uri) {
        // just some safety built in 
        if( uri == null ) {
            // TODO perform some logging or show user feedback
            return null;
        }
        // try to retrieve the image from the media store first
        // this will only work for images selected from gallery
        String[] projection = { MediaStore.Images.Media.DATA };
        Cursor cursor = managedQuery(uri, projection, null, null, null);
        if( cursor != null ){
            int column_index = cursor
            .getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
            cursor.moveToFirst();
            return cursor.getString(column_index);
        }
        // this is our fallback here
        return uri.getPath();`enter code here`
}

}

浏览手机图库中的图像并识别该图像上的条形码

0 个答案: