안드로이드 sdcard 파일 읽고 쓰기

SDCard.java package exam.SDCard; import java.io.File; import java.io.FileInputStream; import java.io.FileNotFoundException; import java.io.FileOutputStream; import android.app.Activity; import android.os.Bundle; import android.os.Environment; import android.view.View; import android.widget.Button; import android.widget.EditText; public class SDCard extends Activity {     /** Called when the activity is first created. */     EditText mEdit;     String mSdPath;          @Override     public void onCreate(Bundle savedInstanceState) {         super.onCreate(savedInstanceState);         setContentView(R.layout.main);                  mEdit = (EditText)findViewById(R.id.edittext);         findViewById(R.id.test).setOnClickListener(mClickListener);         findViewById(R.id.save).setOnClickListener(mClickListener);         findViewById(R.id.load).setOnClickListener(mClickListener);                  String ext = Environment.getExternalStorageState();         if(ext.equals(Environment.MEDIA_MOUNTED)) {             mSdPath = Environment.getExternalStorageDirectory().getAbsolutePath();…

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