catvinhquang/MainAcitivty.java

## MainAcitivty.java
package catvinhquang.myapplication;

import android.app.Activity;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.os.StrictMode;
import android.preference.PreferenceManager;

public class MainActivity extends Activity {

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

        StrictMode.setThreadPolicy(new StrictMode.ThreadPolicy.Builder()
                .detectAll()
                .penaltyLog()
                .penaltyFlashScreen()
                .build());

        StrictMode.setVmPolicy(new StrictMode.VmPolicy.Builder()
                .detectAll()
                .penaltyLog()
                .build());

        SharedPreferences sp = PreferenceManager.getDefaultSharedPreferences(this);
        sp.edit().putBoolean("test", true).apply();
    }
}
	package catvinhquang.myapplication;

	import android.app.Activity;
	import android.content.SharedPreferences;
	import android.os.Bundle;
	import android.os.StrictMode;
	import android.preference.PreferenceManager;

	public class MainActivity extends Activity {

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

	StrictMode.setThreadPolicy(new StrictMode.ThreadPolicy.Builder()
	.detectAll()
	.penaltyLog()
	.penaltyFlashScreen()
	.build());

	StrictMode.setVmPolicy(new StrictMode.VmPolicy.Builder()
	.detectAll()
	.penaltyLog()
	.build());

	SharedPreferences sp = PreferenceManager.getDefaultSharedPreferences(this);
	sp.edit().putBoolean("test", true).apply();
	}
	}