[Android] [JAVA] 按鈕監聽

作法
1). 單項標準作法
2). 多項使用switch作法

//=============================================================

1). 單項標準作法

public class DeviceInfo2 extends Activity {
 /** Called when the activity is first created. */
 @Override
 public void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.main);
  // 找到元件資源
  Button button_info1 = (Button) findViewById(R.id.main_submit_info1);
  // 設定按鍵觸發的method
  button_info1.setOnClickListener(listDeviceInfo);
 }

 private Button.OnClickListener listDeviceInfo = new Button.OnClickListener() {
  @Override
  public void onClick(View v) {
   // 宣告intent，並指定要啟動的class
   Intent intent = new Intent(DeviceInfo2.this, mService.class);
   // 以startservice方式啟動intent
   startService(intent);
  }
 };
}

//=============================================================

2). 多項使用switch作法

public class DeviceInfo2 extends Activity implements OnClickListener{
 /** Called when the activity is first created. */
 @Override
 public void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.main);
  // 找到元件資源
  Button button_info1 = (Button) findViewById(R.id.main_submit_info1);
  button_info1.setOnClickListener(this); 
 }
 @Override
 public void onClick(View v) {
  switch (v.getId()){
  case R.id.main_submit_info1:
   // 宣告intent，並指定要啟動的class
   Intent intent = new Intent(DeviceInfo2.this, mService.class);
   // 以startservice方式啟動intent
   startService(intent);
   break;
  }
 }