ch04.rar

package com.ehappy.exdialog02; import androidx.appcompat.app.AppCompatActivity; import android.os.Bundle; import android.content.DialogInterface; import android.app.AlertDialog; import android.view.Gravity; import android.view.View; import android.widget.Button; import android.widget.EditText; import android.widget.Toast; public class MainActivity extends AppCompatActivity { //建立全域變數 private EditText edtATM; private Button btnN1, btnN2, btnN3; private Button btnN4, btnN5, btnN6; private Button btnN7, btnN8, btnN9, btnN0; private Button btnBack, btnOK, btnEnd; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); //取得介面元件 edtATM=(EditText)findViewById(R.id.edtATM); btnN1=(Button)findViewById(R.id.btnN1); btnN2=(Button)findViewById(R.id.btnN2); btnN3=(Button)findViewById(R.id.btnN3); btnN4=(Button)findViewById(R.id.btnN4); btnN5=(Button)findViewById(R.id.btnN5); btnN6=(Button)findViewById(R.id.btnN6); btnN7=(Button)findViewById(R.id.btnN7); btnN8=(Button)findViewById(R.id.btnN8); btnN9=(Button)findViewById(R.id.btnN9); btnN0=(Button)findViewById(R.id.btnN0); btnBack=(Button)findViewById(R.id.btnBack); btnOK=(Button)findViewById(R.id.btnOK); btnEnd=(Button)findViewById(R.id.btnEnd); //設定共用事件 btnN1.setOnClickListener(listener); btnN2.setOnClickListener(listener); btnN3.setOnClickListener(listener); btnN4.setOnClickListener(listener); btnN5.setOnClickListener(listener); btnN6.setOnClickListener(listener); btnN7.setOnClickListener(listener); btnN8.setOnClickListener(listener); btnN9.setOnClickListener(listener); btnN0.setOnClickListener(listener); btnBack.setOnClickListener(listener); btnOK.setOnClickListener(listener); btnEnd.setOnClickListener(listener); } private Button.OnClickListener listener=new Button.OnClickListener() { @Override public void onClick(View v) { switch(v.getId()) { case R.id.btnN1: //按 1 鈕 displayATM("1"); break; case R.id.btnN2: //按 2 鈕 displayATM("2"); break; case R.id.btnN3: //按 3 鈕 displayATM("3"); break; case R.id.btnN4: //按 4 鈕 displayATM("4"); break; case R.id.btnN5: //按 5 鈕 displayATM("5"); break; case R.id.btnN6: //按 6 鈕 displayATM("6"); break; case R.id.btnN7: //按 7 鈕 displayATM("7"); break; case R.id.btnN8: //按 8 鈕 displayATM("8"); break; case R.id.btnN9: //按 9 鈕 displayATM("9"); break; case R.id.btnN0: //按 0 鈕 displayATM("0"); break; case R.id.btnBack: //按 清除 鈕 String str=edtATM.getText().toString(); if(str.length()>0) { str=str.substring(0, str.length()-1); edtATM.setText(str); } break; case R.id.btnOK: //按 確定 鈕 str=edtATM.getText().toString(); if(str.equals("123456")) { Toast toast=Toast.makeText(MainActivity.this, "密碼正確！歡迎使用提款功能。", Toast.LENGTH_LONG); toast.setGravity(Gravity.CENTER, 0, 0); toast.show(); } else { Toast toast=Toast.makeText(MainActivity.this, "密碼錯誤，請重新輸入。", Toast.LENGTH_LONG); toast.setGravity(Gravity.CENTER, 0, 0); toast.show(); edtATM.setText(""); } break; case R.id.btnEnd: //按 結束 鈕 new AlertDialog.Builder(MainActivity.this) .setTitle("確認視窗") .setIcon(R.mipmap.ic_launcher) .setMessage("確定要結束應用程式嗎？") .setPositiveButton("確定", new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialoginterface, int i) { finish(); } }) .setNegativeButton("取消", new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialoginterface, int i) { } }) .show(); break; } } }; private void displayATM(String s) { String str=edtATM.getText().toString(); edtATM.setText(str + s); } }