打开指定文件夹里的图片

import java.io.File;
import android.app.Activity;
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.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
public class SDCARD123Activity extends Activity implements MediaScannerConnectionClient{
public String[] allFiles;
private String SCAN_PATH ;
private static final String FILE_TYPE="image/*";
private MediaScannerConnection conn;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
File folder = new File("/sdcard/Photo/");
allFiles = folder.list();
//
uriAllFiles= new Uri[allFiles.length];
for(int i=0;i<allFiles.length;i++)
{
Log.d("all file path"+i, allFiles[i]+allFiles.length);
}
//
Uri uri= Uri.fromFile(new File(Environment.getExternalStorageDirectory().toString()+"/yourfoldername/"+allFiles[0]));
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.scanBtn);
scanBtn.setOnClickListener(new 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;
}
}
}

最后

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