package com.example.phi.myapplication6;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.TextView;
import android.widget.Button;
import android.util.Log;
import android.view.View;

public class MainActivity extends AppCompatActivity {

   // Used to load the 'native-lib' library on application startup.
   static {
       System.loadLibrary("native-lib");
   }
   private TextView tv;

   @Override
   protected void onCreate(Bundle savedInstanceState) {
       super.onCreate(savedInstanceState);
       setContentView(R.layout.activity_main);

       // Example of a call to a native method
       tv = (TextView) this.findViewById(R.id.sample_text);
       tv.setText(stringFromJNI());


       // Lấy ra button theo ID
       Button button1 = (Button) this.findViewById(R.id.button1);
       // Sét đặt sự kiện Click vào Button1.
       button1.setOnClickListener(new Button.OnClickListener() {

           @Override
           public void onClick(View view) {

               tv.setText("Result: " + getStringRandom());
           }
       });
   }

   /**
    * A native method that is implemented by the 'native-lib' native library,
    * which is packaged with this application.
    */
   public native String stringFromJNI();
   public native String getStringRandom();

}