如何在Android库中显示特定文件夹中的图像

Question

如何在Android画廊中显示特定文件夹中的所有图像,例如whatapp.我正在使用MediaScannerConnectionClient

File folder = new File("/sdcard/myfolder/");
allFiles = folder.list();
SCAN_PATH=Environment.getExternalStorageDirectory().toString()+"/myfolder/"+allFiles[0];
@Override
public void onScanCompleted(String path, Uri uri) {
    try {
        if (uri != null) {
            Intent intent = new Intent(Intent.ACTION_VIEW);
            intent.setData(uri);
            startActivity(intent);

        }
    } finally {
        conn.disconnect();
        conn = null;
    }
}

private void startScan() {
    if (conn != null) {
        conn.disconnect();
    }
    conn = new MediaScannerConnection(this, this);
    conn.connect();
}
    @Override
public void onMediaScannerConnected() {
    conn.scanFile(SCAN_PATH, "image/*");
}

但是我现在得到一个错误:

    Intent intent = new Intent(Intent.ACTION_VIEW);
    intent.setData(uri);
    startActivity(intent);

具体在这里:

startActivity(intent);

无法获取类型:content:// media/external/images/media/267830找不到处理Intent的活动

在onScanCompleted上,我的路径和uri参数不为空.

Answer 1

您好,您可以使用下面的代码,我希望它可以帮助您.

package com.example.browsepicture;

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 BrowsePicture2 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()+"/aaaa/");
        allFiles = folder.listFiles();

        ((Button) findViewById(R.id.button1))
                .setOnClickListener(new OnClickListener() {
                    public void onClick(View arg0) {
                        new SingleMediaScanner(BrowsePicture2.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();
        }

    }
}