Added read password from file.

app/src/main/java/com/zadanie1/mw/MainActivity.java

@@ -12,15 +12,40 @@ import android.widget.EditText;
 import android.widget.TextView;
 
 import java.io.File;
+import java.io.FileReader;
+import java.io.IOException;
+
 
 public class MainActivity extends AppCompatActivity {
-
-
     TextView response;
     Button button;
     Button restartpassword;
     private EditText textPassword;
     private View viewPassword;
+    private static final String filename = "passwd.txt";
+
+    public String readFile(String filename) throws IOException {
+        String content = null;
+        File file = new File(filename); // For example, foo.txt
+        FileReader reader = null;
+        try {
+            reader = new FileReader(file);
+            char[] chars = new char[(int) file.length()];
+            reader.read(chars);
+            content = new String(chars);
+            reader.close();
+        } catch (IOException e) {
+            e.printStackTrace();
+        } finally {
+            if(reader != null){
+                reader.close();
+            }
+        }
+        return content;
+    }
+
+
+
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {
@@ -42,14 +67,19 @@ public class MainActivity extends AppCompatActivity {
         });
 
         button.setOnClickListener(new OnClickListener() {
+            private final String filename =  getFilesDir() + "/passwd.txt";
             @Override
             public void onClick(View view) {
                 response.setText(textPassword.getText());
-                if (textPassword.getText().toString().equals("123")) {
-                    Intent myIntent2 = new Intent(MainActivity.this,
-                            Noto.class);
-                    startActivity(myIntent2);
-                    finish();
+                try {
+                    if (textPassword.getText().toString().equals(readFile(filename).toString())) {
+                        Intent myIntent2 = new Intent(MainActivity.this,
+                                Noto.class);
+                        startActivity(myIntent2);
+                        finish();
+                    }
+                } catch (IOException e) {
+                    e.printStackTrace();
                 }
             }
         });