Androidのアクティビティを実行時に設定できますか？

Question

典型的な手順は、AXMLを使用して画面のコンテンツを定義することですが、実行時にアクティビティを取り込むことは可能ですか？このような

何か：ここ

override void OnCreate(Bundle bundle){ 
    base.OnCreate(bundle); 

    // INSTEAD OF THIS: 
    var toolbar = FindViewById<Toolbar>(....); 

    // CAN I DO THIS? 
    var toolbar = New<Toolbar>(....); 
} 

Answer 1

は、あなたは、Android StudioでJavaを使用XAMARIN

var layout = new LinearLayout (this); 
layout.Orientation = Orientation.Vertical; 

var aLabel = new TextView (this); 
aLabel.Text = "Hello, World!!!"; 

var aButton = new Button (this); 
aButton.Text = "Say Hello!"; 

aButton.Click +=(sender, e) => 
{aLabel.Text="Hello Android!";}; 

layout.AddView (aLabel); 
layout.AddView (aButton); 
SetContentView (layout); 

のC＃で

を始めるのに役立つサンプル・コードであります

import android.app.Activity; 
import android.os.Bundle; 
import android.util.Log; 
import android.view.Gravity; 
import android.view.View; 
import android.view.ViewGroup; 
import android.view.View.OnClickListener; 
import android.widget.Button; 
import android.widget.CheckBox; 
import android.widget.EditText; 
import android.widget.LinearLayout; 
import android.widget.RadioButton; 
import android.widget.RadioGroup; 
import android.widget.TextView; 
import android.widget.Toast; 
import android.widget.ToggleButton; 
import android.widget.LinearLayout.LayoutParams; 

public class DynamicLayoutActivity extends Activity implements OnClickListener{ 

private static final int MY_BUTTON = 9000; 

@Override 
public void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.main); 

    LinearLayout ll = (LinearLayout)findViewById(R.id.linearLayout2); 

    // add text view 
    TextView tv = new TextView(this); 
    tv.setText("Dynamic Text!"); 
    ll.addView(tv); 

    // add edit text 
    EditText et = new EditText(this); 
    et.setText("Dynamic EditText!"); 
    et.setMinLines(1); 
    et.setMaxLines(3); 
    ll.addView(et); 

    // add button 
    Button b = new Button(this); 
    b.setText("Button added dynamically!"); 
    b.setLayoutParams(new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT)); 
    b.setId(MY_BUTTON); 
    b.setOnClickListener(this); 
    ll.addView(b); 

    //add checkboxes 
    for(int i = 0; i < 10; i++) { 
     CheckBox cb = new CheckBox(this); 
     cb.setText("Dynamic Checkbox " + i); 
     cb.setId(i+10); 
     ll.addView(cb); 
    } 

    //add radio buttons 
    final RadioButton[] rb = new RadioButton[5]; 
    RadioGroup rg = new RadioGroup(this); //create the RadioGroup 
    rg.setOrientation(RadioGroup.HORIZONTAL);//or RadioGroup.VERTICAL 
    for(int i=0; i<5; i++){ 
     rb[i] = new RadioButton(this); 
     rb[i].setText("Dynamic Radio Button " + i); 
     rb[i].setId(i); 
     rg.addView(rb[i]); //the RadioButtons are added to the radioGroup instead of the layout 

    } 
    ll.addView(rg);//you add the whole RadioGroup to the layout 

    // add Toggle button 
    ToggleButton tb = new ToggleButton(this); 
    tb.setTextOn("Dynamic Toggle Button - ON"); 
    tb.setTextOff("Dynamic Toggle Button - OFF"); 
    tb.setChecked(true); 
    tb.setLayoutParams(new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT)); 
    ll.addView(tb); 

} 

public void onClick(View v) { 
    Toast toast; 
    Log.w("ANDROID DYNAMIC VIEWS:", "View Id: " + v.getId()); 
    switch (v.getId()) { 
    case MY_BUTTON: 
     toast = Toast.makeText(this, "Clicked on my dynamically added button!", Toast.LENGTH_LONG); 
     toast.setGravity(Gravity.TOP, 25, 400); 
     toast.show(); 
     saveAnswers(); 
     break; 
     // More buttons go here (if any) ... 

    } 
} 

public void saveAnswers() { 
    LinearLayout root = (LinearLayout) findViewById(R.id.linearLayout1); //or whatever your root control is 
    loopQuestions(root); 
} 

private void loopQuestions(ViewGroup parent) { 
    for(int i = 0; i < parent.getChildCount(); i++) { 
     View child = parent.getChildAt(i); 
     if(child instanceof RadioGroup) { 
      //Support for RadioGroups 
      RadioGroup radio = (RadioGroup)child; 
      storeAnswer(radio.getId(), radio.getCheckedRadioButtonId()); 
     } 
     else if(child instanceof CheckBox) { 
      //Support for Checkboxes 
      CheckBox cb = (CheckBox)child; 
      int answer = cb.isChecked() ? 1 : 0; 
      storeAnswer(cb.getId(), answer); 
     } 
     else if(child instanceof EditText) { 
      //Support for EditText 
      EditText et = (EditText)child; 
      Log.w("ANDROID DYNAMIC VIEWS:", "EdiText: " + et.getText()); 
     } 
     else if(child instanceof ToggleButton) { 
      //Support for ToggleButton 
      ToggleButton tb = (ToggleButton)child; 
      Log.w("ANDROID DYNAMIC VIEWS:", "Toggle: " + tb.getText()); 
     } 
     else { 
      //Support for other controls 
     } 

     if(child instanceof ViewGroup) { 
      //Nested Q&A 
      ViewGroup group = (ViewGroup)child; 
      loopQuestions(group); 
     } 
    } 
} 

private void storeAnswer(int question, int answer) { 
    Log.w("ANDROID DYNAMIC VIEWS:", "Question: " + String.valueOf(question) + " * "+ "Answer: " + String.valueOf(answer)); 

    Toast toast = Toast.makeText(this, String.valueOf(question) + " * "+ "Answer: " + String.valueOf(answer), Toast.LENGTH_LONG); 
    toast.setGravity(Gravity.TOP, 25, 400); 
    toast.show(); 


} 

}