保存データ(2)javaオリジナルファイル格納例
try
{
//
OutputStream os = openFileOutput("file.txt", Activity.MODE_PRIVATE);
String str1 = "《 》";
os.write(str1.getBytes("utf-8"));
os.close();
//
InputStream is = openFileInput("file.txt");
byte[] buffer = new byte[100];
int byteCount = is.read(buffer);
String str2 = new String(buffer, 0, byteCount, "utf-8");
TextView textView = (TextView)findViewById(R.id.textview);
textView.setText(str2);
is.close();
}
catch (Exception e) {
}
ファイルストレージの例を次に示します.
try
{
//
FileOutputStream fos = new FileOutputStream(
android.os.Environment.getExternalStorageDirectory()
+ "/image.jpg");
InputStream is = getResources().getAssets().open("image.jpg");
byte[] buffer = new byte[8192];
int count = 0;
while ((count = is.read(buffer)) >= 0)
{
fos.write(buffer, 0, count);
}
fos.close();
is.close();
Toast.makeText(this, " SD .", Toast.LENGTH_LONG).show();
}
catch (Exception e)
{
Toast.makeText(this, e.getMessage(), Toast.LENGTH_LONG).show();
}
//
String filename = android.os.Environment.getExternalStorageDirectory()
+ "/image.jpg";
if (!new File(filename).exists())
{
Toast.makeText(this, " SD ", Toast.LENGTH_LONG).show();
return;
}
ImageView imageView = (ImageView) findViewById(R.id.imageview);
try
{
FileInputStream fis = new FileInputStream(filename);
Bitmap bitmap = BitmapFactory.decodeStream(fis);
imageView.setImageBitmap(bitmap);
fis.close();
}
catch (Exception e)
{
// TODO: handle exception
}