Android程式碼中動態添加布局

阿新 • • 發佈：2019-01-18

動態新增示例一：

public class MainActivity extends Activity {

@Override
public void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  final LinearLayout layout2 = new LinearLayout(this);
  layout2.setOrientation(LinearLayout.VERTICAL);
  Button btn1 = new Button(this);
  Button btn2 = new Button(this);
  btn1.setText("Button1");
  btn2.setText("Button2");
  layout2.addView(btn1);
  layout2.addView(btn2);

  setContentView(layout2);
  btn1.setOnClickListener(new OnClickListener() {
   @Override
   public void onClick(View v) {
    // TODO Auto-generated method stub
    setTitle("點選button1 ");
              Button btn3=new Button(v.getContext());
              layout2.addView(btn3);
              btn3.setText("Button3");
   }
  });
}
}

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動態新增示例二：
public class MainActivity extends Activity {

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

  //ImageView新增到這個RelativeLayout下邊
        RelativeLayout rl_1 = (RelativeLayout)findViewById(R.id.rl_1);

  //要被新增的ImageView
  ImageView iv_1 = new ImageView(this);
  iv_1.setImageResource(R.drawable.ic_launcher);
//      iv.setId(110);//注意這點設定id                           特別注意的是設定id（imgApple2.setId(110);），方便在以後onclick監聽事件中進行對應的處理
  iv_1.setOnClickListener(new OnClickListener() {
   @Override
   public void onClick(View v) {
    Toast.makeText(MainActivity.this, "you clicked me", 0).show();
   }
  });

        //新增時的佈局引數設定
        RelativeLayout.LayoutParams layoutParams_1 = new RelativeLayout.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
//        layoutParams_1.addRule(RelativeLayout.ALIGN_PARENT_BOTTOM);
//        layoutParams_1.setMargins(30, 50, 100, 100);
        layoutParams_1.leftMargin=500;
        layoutParams_1.topMargin = 500;
        rl_1.addView(iv_1,layoutParams_1);





      //ImageView新增到這個RelativeLayout下邊
        RelativeLayout rl_2 = (RelativeLayout)findViewById(R.id.rl_2);

  //要被新增的ImageView
  ImageView iv_2 = new ImageView(this);
  iv_2.setImageResource(R.drawable.ic_launcher);
//      iv.setId(110);//注意這點設定id
  iv_2.setOnClickListener(new OnClickListener() {
   @Override
   public void onClick(View v) {
    Toast.makeText(MainActivity.this, "you clicked me", 0).show();
   }
  });

        //新增時的佈局引數設定
        RelativeLayout.LayoutParams layoutParams_2 = new RelativeLayout.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
//        layoutParams_2.setMargins(30, 50, 100, 100);
        layoutParams_2.leftMargin=40;
        layoutParams_2.topMargin = 400;
        rl_2.addView(iv_2,layoutParams_2);

}
}

--------------------------------------------------------------------------------------------------------------------------------------

動態新增示例三：

public class MainActivity extends Activity {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    //設定佈局
    setContentView(R.layout.activity_main);

    //自定義的帶提示文字的EditText元件
    EditText ed = new EditText(this);
    ed.setHint("請輸入。。。。。。。。");

    //設定從左邊140px處開始輸入文字
    ed.setPadding(140, 0, 0, 0);

    //向如下relativeLayout這個佈局中動態新增一個EditText
    RelativeLayout relativeLayout = (RelativeLayout) findViewById(R.id.rl_2);

    //建立一個LayoutParams物件
    RelativeLayout.LayoutParams layoutParams = new RelativeLayout.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT,
      ViewGroup.LayoutParams.WRAP_CONTENT);

    //設定android:layout_below屬性的值
    layoutParams.addRule(RelativeLayout.BELOW, R.id.et_inner);
    //動態新增EditText
    relativeLayout.addView(ed, layoutParams);

}
}

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動態新增示例（綜合《很好》）：

public class MainActivity extends Activity {

private static int id = 100;

@Override
protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.activity_main);

  final LinearLayout lin = (LinearLayout) findViewById(R.id.list_Lin);
  LinearLayout.LayoutParams LP_FW = new LinearLayout.LayoutParams(
    LinearLayout.LayoutParams.FILL_PARENT, LinearLayout.LayoutParams.WRAP_CONTENT);
  RelativeLayout newSingleRL=new RelativeLayout(this);

  for(int i=0;i<10;)
  {
   newSingleRL=generateSingleLayout(id,"第"+(++i)+"個動態列表");
   lin.addView(newSingleRL,LP_FW);//全部用父結點的佈局引數
  }


//  final LinearLayout root = (LinearLayout) findViewById(R.id.layout_root); //獲取總根結點
//  setContentView(root); //這裡必須是總根結點
}
/**
* 新建一個列表item
* @param imageID 新建imageView的ID值
* @param str TextView要顯示的文字
* @return 新建的單項佈局變數
*/
private RelativeLayout generateSingleLayout(int imageID,String str)
{

  //最外層相對佈局：其他（一個LinearLayout，一個ImageView）都會新增在此佈局內部。
  RelativeLayout layout_root_relative=new RelativeLayout(this);

  //ImageView被新增在最外層layout_root_relative的右邊：params.addRule(RelativeLayout.ALIGN_PARENT_RIGHT);
   ImageView imageView = new ImageView(this);

   //out.1
   RelativeLayout.LayoutParams RL_WW = new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.WRAP_CONTENT,
     RelativeLayout.LayoutParams.WRAP_CONTENT);
   imageView.setPadding(5, 5, 5, 5);
   RL_WW.addRule(RelativeLayout.ALIGN_PARENT_RIGHT);
      imageView.setLayoutParams(RL_WW);
      imageView.setClickable(true);
      imageView.setId(imageID);
      imageView.setImageResource(R.drawable.plus);

      layout_root_relative.addView(imageView);

//>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>


    //LinearLayout被新增在最外層layout_root_relative裡邊，並且在ImageView的左邊:params.addRule(RelativeLayout.LEFT_OF,imageID);
  LinearLayout layout_sub_Lin=new LinearLayout(this);
  layout_sub_Lin.setBackgroundColor(Color.argb(0xff, 0x00, 0xff, 0x00));
  layout_sub_Lin.setOrientation(LinearLayout.VERTICAL);
  layout_sub_Lin.setPadding(5, 5, 5, 5);


  //TextView是被新增在最外層layout_root_relative內部的LinearLayout裡邊
  TextView tv = new TextView(this);

  //inner.1
  LinearLayout.LayoutParams LP_WW = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.WRAP_CONTENT,
     LinearLayout.LayoutParams.WRAP_CONTENT);
  tv.setText(str);
  tv.setTextColor(Color.argb(0xff, 0x00, 0x00, 0x00));
  tv.setTextSize(20);
  tv.setLayoutParams(LP_WW);

  layout_sub_Lin.addView(tv);




  //out.2
  RelativeLayout.LayoutParams RL_MW = new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.MATCH_PARENT,
    RelativeLayout.LayoutParams.WRAP_CONTENT);//尤其注意這個位置，用的是父容器的佈局引數
  RL_MW.setMargins(5, 5, 150, 5);
  RL_MW.addRule(RelativeLayout.LEFT_OF,imageID);

  layout_root_relative.addView(layout_sub_Lin,RL_MW);

//>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>

return layout_root_relative;

}

}

--------------------------------------------------------------------------------------------------------------------------------------

動態新增：尺碼，顏色，容量，可以使用這裡（很好）

public class MainActivity extends Activity {
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);

  DisplayMetrics dm = new DisplayMetrics();
  getWindowManager().getDefaultDisplay().getMetrics(dm);
  int width = dm.widthPixels;
  // int height = dm.heightPixels;

// 自定義layout元件
RelativeLayout layout = new RelativeLayout(this);

// 這裡建立16個按鈕，每行放置4個按鈕

  Button Btn[] = new Button[14];
  int j = -1;
  for (int i = 0; i < Btn.length; i++) {
   Btn[i] = new Button(this);
   Btn[i].setId(2000 + i);
   Btn[i].setText("按鈕" + i);
   RelativeLayout.LayoutParams btParams = new RelativeLayout.LayoutParams(
     (width - 50) / 4, 100); // 設定按鈕的寬度和高度
   if (i % 4 == 0) {
    j++;
   }
   btParams.leftMargin = 10 + ((width - 50) / 4 + 10) * (i % 4); // 橫座標定位
   btParams.topMargin = 20 + 100 * j; // 縱座標定位
   layout.addView(Btn[i], btParams); // 將按鈕放入layout元件
  }
  this.setContentView(layout);

  // 批量設定監聽
  for (int k = 0; k <= Btn.length - 1; k++) {
   // 這裡不需要findId，因為建立的時候已經確定哪個按鈕對應哪個Id
   Btn[k].setTag(k); // 為按鈕設定一個標記，來確認是按下了哪一個按鈕

   Btn[k].setOnClickListener(new Button.OnClickListener() {
    @Override
    public void onClick(View v) {
     int i = (Integer) v.getTag(); // 這裡的i不能在外部定義，因為內部類的關係，內部類好多繁瑣的東西，要好好研究一番
     Toast.makeText(MainActivity.this, "count = " + i,
       Toast.LENGTH_SHORT).show();
    }
   });
  }
}
}

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一種思路：

通過使用LayoutInflater 每次點選按鈕時候去讀取佈局檔案，然後找到佈局檔案裡面的各個VIEW 操作完VIEW 後加載進我們setContentView 方面裡面的要放的佈局檔案裡面，
每次動態載入檔案必需呼叫 removeAllViews方法，清除之前的載入進來的 View 。

  final LayoutInflater inflater = LayoutInflater.from(this);
  Button btn = (Button) findViewById(R.id.Button01);
  Button btn2 = (Button) findViewById(R.id.Button02);
  final LinearLayout lin = (LinearLayout) findViewById(R.id.LinearLayout01);//下邊的線性佈局
  btn.setOnClickListener(new OnClickListener() {

   @Override
   public void onClick(View v) {
    // TODO Auto-generated method stub
    View view = View.inflate(MainActivity.this, R.layout.listview, null);       //listview.xml裡邊根節點一個線性佈局（感覺有點多餘），線性佈局裡邊一個listview
    LinearLayout ll = (LinearLayout) view.findViewById(R.id.layout);

    ListView lv = (ListView) ll.getChildAt(0);
    lv.setAdapter(new listAdapter(MainActivity.this));
    lin.removeAllViews();
    lin.addView(ll);


//    LinearLayout layout = (LinearLayout) inflater.inflate(R.layout.listview, null).findViewById(R.id.layout);

//    ListView lv = (ListView) layout.getChildAt(0);
//    lv.setAdapter(new listAdapter(MainActivity.this));
//    lin.removeAllViews();
//    lin.addView(layout);
   }
  });

btn2.setOnClickListener(new OnClickListener() {

   @Override
   public void onClick(View v) {
    // TODO Auto-generated method stub
    LinearLayout layout = (LinearLayout) inflater.inflate(
      R.layout.hello, null).findViewById(R.id.hellolayout);     //hello.xml裡邊根節點是一個線性佈局（感覺有點多餘），線性佈局裡邊一個textview
    TextView lv = (TextView) layout.getChildAt(0);
    lv.setTextColor(Color.RED);
    lin.removeAllViews();
    lin.addView(layout);
   }
  });
}
}

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