Android for Game Developers - Beginning Android Games - page 153

import java.io.FileWriter;
import java.io.IOException;
import android.app.Activity;
import android.os.Bundle;
import android.os.Environment;
import android.widget.TextView;
public class ExternalStorageTest extends Activity {
@Override
public void onCreate(Bundle savedInstanceState) {
super .onCreate(savedInstanceState);
TextView textView = new TextView( this );
setContentView(textView);
String state = Environment. getExternalStorageState ();
if (!state.equals(Environment. MEDIA_MOUNTED )) {
textView.setText("No external storage mounted");
} else {
File externalDir = Environment. getExternalStorageDirectory ();
File textFile = new File(externalDir.getAbsolutePath()
+ File. separator + "text.txt");
try {
writeTextFile(textFile, "This is a test. Roger");
String text = readTextFile(textFile);
textView.setText(text);
if (!textFile.delete()) {
textView.setText("Couldn't remove temporary file");
}
} catch (IOException e) {
textView.setText("Something went wrong! " + e.getMessage());
}
}
}
private void writeTextFile(File file, String text) throws IOException {
BufferedWriter writer = new BufferedWriter( new FileWriter(file));
writer.write(text);
writer.close();
}
private String readTextFile(File file) throws IOException {
BufferedReader reader = new BufferedReader( new FileReader(file));
StringBuilder text = new StringBuilder();
String line;
while ((line = reader.readLine()) != null ) {
text.append(line);
text.append("\n");
}
reader.close();
return text.toString();
}
}