The simplest SD card file to traverse the Android program _android

This example for you to share the simplest SD card file traversal procedures for your reference, the specific content as follows

Package Com.wenhao.test.sddemo;

Import Java.io.File;
Import android.app.Activity;
Import Android.os.Bundle;
Import android.os.Environment;
Import Android.view.View;
Import Android.view.View.OnClickListener;
Import Android.widget.Button;

Import Android.widget.Toast; The public class Maindemo extends activity {/** called the ' when the ' is the ' The activity ' is the ' the '. */private Button button =
  Null
  
  Private File path;
    @Override public void OnCreate (Bundle savedinstancestate) {super.oncreate (savedinstancestate);
      
    Setcontentview (R.layout.main);
    
    Button = (button) Findviewbyid (R.id.mybutton); Detect if the SD card exists if (Environment.getexternalstoragestate (). Equals (environment.media_mounted)) {path = EnviR
    Onment.getexternalstoragedirectory ();
      }else{Toast.maketext (This, "No SD card", Toast.length_long). Show ();
    Finish (); Button.setonclicklistener (New Onclicklistener () {@Override public void OnClick (View v) {
        TODO auto-generated Method Stub getallfiles (path);
    
  }
    }); 
    //traversal receives a file path and then iterates through and out of all files in the subdirectory of the file private void Getallfiles (file root) {file files[] = Root.listfiles (); 
        if (Files!= null) {for (File f:files) {if (F.isdirectory ()) {getallfiles (f); 
        }else{System.out.println (f);
 } 
      } 
    } 
  } 
   
}

The above is the entire content of this article, I hope to help you learn, but also hope that we support the cloud habitat community.