基于Android代码实现常用布局

// 利用代码设置 线性布局 private void setLinearLayout(){  LinearLayout llayout = new LinearLayout(this);  llayout.setOrientation(LinearLayout.VERTICAL); // 设置线性布局的排列方式  TextView textView = new TextView(this);  textView.setText("代码实现的线性布局");  textView.setTextColor(Color.RED);  textView.setGravity(Gravity.CENTER); // 设置文本内容的对齐方式  LinearLayout.LayoutParams ll_lpara = new LinearLayout.LayoutParams(MP,WC);//  ll_lpara.gravity = Gravity.CENTER_HORIZONTAL; // 设置控件在布局中的对齐方式  llayout.addView(textView,ll_lpara);  Button btn = new Button(this);  btn.setText("按钮");  llayout.addView(btn,ll_lpara); // 按指定属性添加控件  setContentView(llayout);   }

// 利用代码设置 相对布局 private void setRelativeLayout(){  RelativeLayout rlayout = new RelativeLayout(this);  rlayout.setPadding(10, 10, 10, 10); // 单位: pixels  int textViewID = 100;  TextView textView = new TextView(this);  textView.setId(textViewID);  textView.setText("请输入:");  RelativeLayout.LayoutParams rl_lpara1 = new RelativeLayout.LayoutParams(MP, WC);  rlayout.addView(textView, rl_lpara1);  int editTextID = 200;  EditText editText = new EditText(this);  editText.setId(editTextID);  editText.setBackgroundResource(android.R.drawable.editbox_background); // 设置背景 , 同android:backgroumd  RelativeLayout.LayoutParams rl_lpara2 = new RelativeLayout.LayoutParams(MP, WC);  rl_lpara2.addRule(RelativeLayout.BELOW,textViewID); // 设置相对属性,需先指定相对控件的ID  rlayout.addView(editText, rl_lpara2);    int backBtnID = 300;  Button backBtn = new Button(this);  backBtn.setId(backBtnID);  backBtn.setText("返回");  RelativeLayout.LayoutParams rl_lpara3 = new RelativeLayout.LayoutParams(WC, WC);  rl_lpara3.addRule(RelativeLayout.BELOW, editTextID);  rl_lpara3.addRule(RelativeLayout.ALIGN_PARENT_RIGHT); // 设置与父控件的相对属性  rlayout.addView(backBtn, rl_lpara3);  Button okBtn = new Button(this);  okBtn.setText("确定");  RelativeLayout.LayoutParams rl_lpara4 = new RelativeLayout.LayoutParams(WC, WC);  rl_lpara4.addRule(RelativeLayout.LEFT_OF, backBtnID);  rl_lpara4.addRule(RelativeLayout.ALIGN_TOP,backBtnID);  rlayout.addView(okBtn, rl_lpara4);  setContentView(rlayout); }

// 利用代码设置 表格布局 private void setTableLayout(){  TableLayout tlayout = new TableLayout(this);  tlayout.setColumnStretchable(2, true); // 拉长索引从0开始的第2列  TableLayout.LayoutParams tl_lpara = new TableLayout.LayoutParams(MP,WC);  // 1. TableRow 不需要设置 layout_width, layout_height  // 2. TableRow 中的控件不能设置 layout_span 属性  TableRow tr1 = new TableRow(this);   TextView textView0 = new TextView(this);  textView0.setText("第0列");  tr1.addView(textView0);    TextView textView1 = new TextView(this);  textView1.setText("第1列");  tr1.addView(textView1);    TextView textView2 = new TextView(this);  textView2.setText("第2列");  textView2.setBackgroundColor(Color.CYAN);  tr1.addView(textView2);     tlayout.addView(tr1, tl_lpara);   TableRow tr2 = new TableRow(this);  Button btn0 = new Button(this);  btn0.setText("按钮0");  tr2.addView(btn0);    Button btn1 = new Button(this);  btn1.setText("按钮1");  tr2.addView(btn1);    Button btn2 = new Button(this);  btn2.setText("按钮2");  tr2.addView(btn2);   Button btn3 = new Button(this);  btn3.setText("按钮3");  tr2.addView(btn3);  tlayout.addView(tr2, tl_lpara);  setContentView(tlayout);   }