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Hướng dẫn lập trình cơ bản với Android, bài 17

Code code code. So tired. Tutorial is really take time. | Hướng dẫn lập trình CO bẩn với Android Part 17 B4 Code code code. So tired. Tutorial is really take time. Chỉnh Example.java Mã package at.exam import android.app.Activity import android.os.Bundle import android.view.Menu import android.view.MenuItem import android.view.View import android.view.View.OnClickListener import android.widget.Button import android.widget.TextView public class Example extends Activity Button button1 button2 button3 Button button4 button5 button6 Button button7 button8 button9 Button button0 buttonStar buttonClear TextView numberView Called when the activity is first created. @Override public void onCreate Bundle savedInstanceState super.onCreate savedInstanceState setContentView R.layout.main numberView TextView findViewById R.id.number_display button1 Button findViewById R.id.button1 button2 Button findViewById R.id.button2 button3 Button findViewById R.id.button3 button4 Button button5 Button button6 Button findViewById R.id.button4 findViewById R.id.button5 findViewById R.id.button6 button7 Button button8 Button button9 Button findViewById R.id.button7 findViewById R.id.button8 findViewById R.id.button9 button0 Button findViewById R.id.button0 buttonstar Button findViewById R.id.button_star buttonClear Button findViewById R.id.button_clear button1.setOnClickListener this.appendString 1 button2.setOnClickListener this.appendString 2 button3.setOnClickListener this.appendString 3 button4.setOnClickListener this.appendString 4 button5.setOnClickListener this.appendString 5 button6.setOnClickListener this.appendString 6 button7.setOnClickListener this.appendString 7 button8.setOnClickListener this.appendString 8 button9.setOnClickListener this.appendString 9 button0.setOnClickListener this.appendString 0 buttonStar.setOnClickListener this.appendString buttonClear Button findViewById R.id.button_clear buttonClear.setOnClickListener new OnClickListener public void onClick View v numberView.setText public OnClickListener appendString final .