Android:使用目标sdk打开图库专辑24

Question

是否可以从sdk v24开始在Android Gallery中打开相册？

我有一个应用程序操纵图像并将其保存到特定专辑名称下的外部存储.我希望应用程序能够直接在Android Gallery中打开该相册.是否有可能实现这一目标？

我可以轻松打开一个文件,但不能打开整个相册:

我的 AndroidManifest.xml

...
<provider
    android:name="android.support.v4.content.FileProvider"
    android:authorities="${applicationId}.provider"
    android:exported="false"
    android:grantUriPermissions="true">
    <meta-data
        android:name="android.support.FILE_PROVIDER_PATHS"
        android:resource="@xml/provider_paths"/>
</provider>
...

我的 provider_paths.xml

<?xml version="1.0" encoding="utf-8"?>
<paths xmlns:android="http://schemas.android.com/apk/res/android">
    <external-path name="external_files" path="."/>
</paths>

我打开特定文件的处理:

Intent i = new Intent();
i.setAction(Intent.ACTION_VIEW);
File myFile = new File(new File(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES), MY_ALBUM_NAME), MY_FILE_NAME);
Uri myUri = FileProvider.getUriForFile(context, context.getPackageName() + ".provider", myFile);
i.setDataAndType(myUri, "image/*");
i.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
startActivity(i);

打开特定文件可以正常工作.但是,我无法打开整张专辑.那可能吗？

Answer 1

您可以扫描相册中的图像并在您创建的活动中显示它们，而无需打开相册中的图库。

public class MainActivity extends AppCompatActivity implements MediaScannerConnection.MediaScannerConnectionClient {
public String[] allFiles;
private String SCAN_PATH ;
private static final String FILE_TYPE="image/*";

private MediaScannerConnection conn;

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.content_main);

    File folder = Environment
            .getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES + "/YourAlbumName");
    allFiles = folder.list();
    for(int i=0;i<allFiles.length;i++)
    {
        Log.d("all file path"+i, allFiles[i]+allFiles.length);
    }


    SCAN_PATH=Environment.getExternalStorageDirectory().toString()+"/Photo/"+allFiles[0];
    System.out.println(" SCAN_PATH  " +SCAN_PATH);

    Log.d("SCAN PATH", "Scan Path " + SCAN_PATH);
    Button scanBtn = (Button)findViewById(R.id.button);
    scanBtn.setOnClickListener(new View.OnClickListener(){
        @Override
        public void onClick(View v) {
            startScan();
        }});
}
private void startScan()
{
    Log.d("Connected","success"+conn);
    if(conn!=null)
    {
        conn.disconnect();
    }
    conn = new MediaScannerConnection(this,this);
    conn.connect();
}
@Override
public void onMediaScannerConnected() {
    Log.d("onMediaScannerConnected","success"+conn);
    conn.scanFile(SCAN_PATH, FILE_TYPE);
}
@Override
public void onScanCompleted(String path, Uri uri) {
    try {
        Log.d("onScanCompleted",uri + "success"+conn);
        System.out.println("URI " + uri);
        if (uri != null)
        {
            Intent intent = new Intent(Intent.ACTION_VIEW);
            intent.setData(uri);
            startActivity(intent);
        }
    } finally
    {
        conn.disconnect();
        conn = null;
    }
}

}