Android 動態的增加物件以按鈕為例子

寫了一範例

這個範例 一開始有一個按鈕, 按一下新增一個按鈕
按下新的按鈕則顯示誰被按了

歡迎來我的部落格

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import android.app.Activity; import android.app.AlertDialog; import android.content.DialogInterface; import android.os.Bundle; import android.view.View; import android.view.View.OnClickListener; import android.widget.Button; import android.widget.LinearLayout; //原創作者 軟貓軟體 http://toimy.blogspot.com/ public class AddButtonActivity extends Activity implements OnClickListener { LinearLayout layout; private Button btn1; private int CurrentButtonNumber = 0; //CurrentButtonNumber流水號 設定物件ID /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); //先建立一個 面板放置所有元件 layout= new LinearLayout(this); layout.setOrientation(LinearLayout.VERTICAL); //面板的擺設方式為垂直 btn1 = new Button(this); btn1.setId(CurrentButtonNumber); CurrentButtonNumber++; btn1.setText("SoftCat Go Button"); btn1.setOnClickListener(this); //如果要這樣寫 需加入 implements OnClickListener 於 Activity layout.addView(btn1, 150, 50); //addView(物件,寬度高度) setContentView(layout); //設定畫面顯示自己的面板 } public void onClick(View v) { switch(v.getId()){ case 0://增加按鈕 Button TmpBtn = new Button(v.getContext()); TmpBtn.setText("I am Button" + String.valueOf(CurrentButtonNumber) ); TmpBtn.setId(CurrentButtonNumber); TmpBtn.setOnClickListener(this); LinearLayout.LayoutParams param =new LinearLayout.LayoutParams(100,50); CurrentButtonNumber++; layout.addView(TmpBtn, param); break; default://其他按鈕 alertbox("I be hit.....oh...","you hit me . I am "+ String.valueOf(v.getId())); break; } } //顯示對話方塊 protected void alertbox(String title, String mymessage) { new AlertDialog.Builder(this) .setMessage(mymessage) .setTitle(title) .setCancelable(true) .setNeutralButton(android.R.string.ok, new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialog, int whichButton){} }) .show(); } }