Android 如何在图库中打开特定的目录

Question

我的应用拍了一张照片并保存在 Gallery/MyAppname/ 下。我只想打开 Gallery 下的 My app 目录。我只想看所有图片

我想看到所有的照片，就像图库应用程序一样。请查看截图：-

Answer 1

您可以使用 MediaScannerConnectionClient 实现

package com.data.pictures;

import java.io.File;

import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.media.MediaScannerConnection;
import android.media.MediaScannerConnection.MediaScannerConnectionClient;
import android.net.Uri;
import android.os.Bundle;
import android.os.Environment;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;

public class Pictures extends Activity {
    String SCAN_PATH;
    File[] allFiles ;
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_browse_picture);

        File folder = new File(Environment.getExternalStorageDirectory().getPath()+"/test/");
        allFiles = folder.listFiles();

        ((Button) findViewById(R.id.button1))
                .setOnClickListener(new OnClickListener() {
                    public void onClick(View arg0) {
                        new SingleMediaScanner(Pictures.this, allFiles[0]);
                    }
                });
    }

    public class SingleMediaScanner implements MediaScannerConnectionClient {

        private MediaScannerConnection mMs;
        private File mFile;

        public SingleMediaScanner(Context context, File f) {
            mFile = f;
            mMs = new MediaScannerConnection(context, this);
            mMs.connect();
        }

        public void onMediaScannerConnected() {
            mMs.scanFile(mFile.getAbsolutePath(), null);
        }

        public void onScanCompleted(String path, Uri uri) {
            Intent intent = new Intent(Intent.ACTION_VIEW);
            intent.setData(uri);
            startActivity(intent);
            mMs.disconnect();
        }

    }
}

对于更新的问题，我建议使用这个 link 来理解 Link

Answer 2

以下代码打开图库中的特定目录。此代码适用于新旧 Android 设备。我测试了 Android 6。

    public static void openGallery(Context context) {
        String bucketId = "";
        final String[] projection = new String[] {"DISTINCT " + MediaStore.Images.Media.BUCKET_DISPLAY_NAME + ", " + MediaStore.Images.Media.BUCKET_ID};
        final Cursor cur = context.getContentResolver().query(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, projection, null, null, null);
        while (cur != null && cur.moveToNext()) {
            final String bucketName = cur.getString((cur.getColumnIndex(MediaStore.Images.ImageColumns.BUCKET_DISPLAY_NAME)));
            if (bucketName.equals("Your_dir_name")) {
                bucketId = cur.getString((cur.getColumnIndex(MediaStore.Images.ImageColumns.BUCKET_ID)));
                break;
            }
        }
        Uri mediaUri = MediaStore.Images.Media.EXTERNAL_CONTENT_URI;

        if (bucketId.length() > 0) {
            mediaUri = mediaUri.buildUpon()
                    .authority("media")
                    .appendQueryParameter("bucketId", bucketId)
                    .build();
        }
        if(cur != null){
            cur.close();
        }
        Intent intent = new Intent(Intent.ACTION_VIEW, mediaUri);
        context.startActivity(intent);
    }

Android 如何在图库中打开特定的目录

Android how to open a specific director in Gallery

android

image-gallery