Android - 以編程方式將按鈕添加到現有佈局中

Question

我正在構建一個soundboard應用程序，其中我在tablelayout中嵌入了一些預定義按鈕，它嵌套在相對佈局中。佈局是一個自己的片段（我使用多個選項卡爲不同的類別）。

聲音和標籤工作正常，現在我要實現的功能，您生成一個新的按鈕，一旦你點擊「+」按鈕，將「+」按鈕下方移動一行新的按鈕。

有沒有辦法生成一個新的tablelayout，與已有的相同的屬性，而不必在xml文件中使用空白？

Answer 1

試試這個簡單的例子，修改爲按您的要求

public class MainActivity extends Activity { 
     Context context; 
     ScrollView scrollView; 
     LinearLayout container; 
     LinearLayout layout; 
     @Override 
     protected void onCreate(Bundle savedInstanceState) { 
      super.onCreate(savedInstanceState); 
      context = this; 
      setContentView(R.layout.activity_main); 
      layout = (LinearLayout) findViewById(R.id.LinearAdd); 


     } 

     public void addButton(View view) { 
      Button button = new Button(MainActivity.this); 
      LayoutParams lp = new LayoutParams(LayoutParams.WRAP_CONTENT,LayoutParams.WRAP_CONTENT); 
      button.setLayoutParams(lp); 
      button.setText("ADDED"); 
      layout.addView(button); 
     } 

    } 

And this your xml 

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    xmlns:tools="http://schemas.android.com/tools" 
    android:layout_width="match_parent" 
    android:layout_height="match_parent" 
    android:orientation="vertical" 
    tools:context=".MainActivity" > 

    <LinearLayout 
     android:id="@+id/LinearAdd" 
     android:layout_width="match_parent" 
     android:layout_height="0dp" 
     android:layout_weight="70" 
     android:orientation="vertical" > 

     <Button 
      android:layout_width="wrap_content" 
      android:layout_height="wrap_content" 
      android:onClick="addButton" 
      android:text="click to add" /> 
    </LinearLayout> 

</LinearLayout> 

Answer 2

這裏是我的佈局片段代碼：

<?xml version="1.0" encoding="utf-8"?> 

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" 
android:layout_width="match_parent" 
android:layout_height="match_parent" 
android:orientation="vertical"> 

<TableLayout 
    android:layout_width="match_parent" 
    android:layout_height="wrap_content" 
    android:stretchColumns="*" 
    android:id="@+id/tableLayout"> 


    <TableRow 
     android:layout_width="fill_parent" 
     android:layout_height="fill_parent" 
     android:layout_column="1"> 
     <Button 
      android:background="@drawable/button" 
      style="@style/button_text" 
      android:layout_width="wrap_content" 
      android:layout_height="wrap_content" 
      android:id="@+id/tab01sound01" 
      android:layout_column="0" 
      android:text="@string/buttonAlan" /> 
    </TableRow> 

</TableLayout> 

<TableLayout 
    android:layout_width="match_parent" 
    android:layout_height="wrap_content" 
    android:stretchColumns="*" 
    android:layout_below="@+id/tableLayout2" 
    android:layout_alignParentLeft="true" 
    android:layout_alignParentStart="true" 
    android:id="@+id/thirdTable"> 

</TableLayout> 

</RelativeLayout> 

Answer 3

這是我的第一個片段標籤的代碼

public class Tab1 extends Fragment { 

private int buttonAmount = MainActivity.getButtonAmountTab1(); 
private Button[] button = new Button[buttonAmount + 1]; 
private Sound sound; 
private String packageName = MainActivity.getStringPackageName(); 
private Button addButton; 

@Override 
public View onCreateView(LayoutInflater inflater, ViewGroup container, 
         Bundle savedInstanceState) { 
    sound = MainActivity.getSound(); 

    View rootView = inflater.inflate(R.layout.fragment_fun, container, false); 

    //This generates the Audio functionality for each button 

    for (int i = 1; i < buttonAmount + 1; i++) { 
     String buttonID = "tab01sound0" + i; 
     int resID = getResources().getIdentifier(buttonID, "id", packageName); 
     final int audioID = getResources().getIdentifier(buttonID, "raw", packageName); 
     button[i] = (Button) rootView.findViewById(resID); 
     registerForContextMenu(button[i]); 
     button[i].setOnClickListener(new View.OnClickListener() { 
      public void onClick(View v) { 
       sound.playSound(audioID); 
      } 

     }); 

    } 

    //functionality for the "+" button 

    addButton = (Button) rootView.findViewById(R.id.addButton); 
    addButton.setOnClickListener(new View.OnClickListener() { 
     public void onClick(View v) { 
      CreateDialog newDialog = new CreateDialog(); 
      newDialog.AlertBox(getActivity()); 

     } 
    }); 

    return rootView; 

} 

}