Android代码布局，baseadapter很需要的哦！

相信万能的baseadpter虽然好用，但是复杂的getview（）方法的布局让人头疼，所以掌握一定的代码布局是很有必要的哦！

关于 android 常用布局，利用 XML 文件实现已经有很多的实例了。但如何利用代码实现呢？当然利用代码实现没有太大的必要，也是不提倡的，但我觉得利用代码实现这些布局，可以更好的了解 SDK API ，所以在此也整理一下，和大家分享一下。

首先看一下，布局所对应的类的 API 继承图：

所有的布局都会对应相关的类，这些类都是继承自 android.view.ViewGroup 类的。而 LinearLayout,RelativeLayout 都是在 android.widget 包里的。另外，TableLayout 是继承自 LinearLayout.

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下面直接贴代码了。

// 利用代码设置线性布局
<wbr><wbr><wbr><span style="color:#2f3699">private void setLinearLayout(){<br><wbr><wbr><wbr><wbr>LinearLayout llayout = new LinearLayout(this);<br><wbr><wbr><wbr><wbr>llayout.setOrientation(LinearLayout.VERTICAL); <span style="color:#ff7e00"> // 设置线性布局的排列方式</span><br><wbr><wbr><wbr><wbr>TextView textView = new TextView(this);<br><wbr><wbr><wbr><wbr>textView.setText("代码实现的线性布局");<br><wbr><wbr><wbr><wbr>textView.setTextColor(Color.RED);<br><wbr><wbr><wbr><wbr>textView.setGravity(Gravity.CENTER); <span style="color:#ff7e00"> // 设置文本内容的对齐方式<br></span><wbr><wbr><wbr><wbr>LinearLayout.LayoutParams ll_lpara = new LinearLayout.LayoutParams(MP,WC);<br> // <wbr><wbr><wbr><wbr>ll_lpara.gravity = Gravity.CENTER_HORIZONTAL; <span style="color:#ff7e00"> // 设置控件在布局中的对齐方式</span><br><wbr><wbr><wbr><wbr>llayout.addView(textView,ll_lpara);<br><wbr><wbr><wbr><wbr><br><wbr><wbr><wbr><wbr>Button btn = new Button(this);<br><wbr><wbr><wbr><wbr>btn.setText("按钮");<br><wbr><wbr><wbr><wbr>llayout.addView(btn,ll_lpara); <span style="color:#ff7e00"> // 按指定属性添加控件<br></span><wbr><wbr><wbr><wbr>setContentView(llayout); <wbr><wbr><wbr><wbr><br><wbr><wbr><wbr>}</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></span></wbr></wbr></wbr>

实现效果图：

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// 利用代码设置 相对布局
<wbr><wbr><wbr><span style="color:#2f3699">private void setRelativeLayout(){<br><wbr><wbr><wbr><wbr>RelativeLayout rlayout = new RelativeLayout(this);<br><wbr><wbr><wbr><wbr>rlayout.setPadding(10, 10, 10, 10); <span style="color:#ff7e00"> // 单位: pixels</span><br><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><br><wbr><wbr><wbr><wbr>int textViewID = 100;<br><wbr><wbr><wbr><wbr>TextView textView = new TextView(this);<br><wbr><wbr><wbr><wbr>textView.setId(textViewID);<br><wbr><wbr><wbr><wbr>textView.setText("请输入:");<br><wbr><wbr><wbr><wbr>RelativeLayout.LayoutParams rl_lpara1 = new RelativeLayout.LayoutParams(MP, WC);<br><wbr><wbr><wbr><wbr>rlayout.addView(textView, rl_lpara1);<br><wbr><wbr><wbr><wbr><br><wbr><wbr><wbr><wbr>int editTextID = 200;<br><wbr><wbr><wbr><wbr>EditText editText = new EditText(this);<br><wbr><wbr><wbr><wbr>editText.setId(editTextID);<br><wbr><wbr><wbr><wbr>editText.setBackgroundResource(android.R.drawable.editbox_background);<span style="color:#ff7e00">// 设置背景 , 同android:backgroumd<br></span><wbr><wbr><wbr><wbr>RelativeLayout.LayoutParams rl_lpara2 = new RelativeLayout.LayoutParams(MP, WC);<br><wbr><wbr><wbr><wbr>rl_lpara2.addRule(RelativeLayout.BELOW,textViewID); <span style="color:#ff7e00"> // 设置相对属性,需先指定相对控件的ID<br></span><wbr><wbr><wbr><wbr>rlayout.addView(editText, rl_lpara2); <wbr><wbr><wbr><wbr><br><wbr><wbr><wbr><wbr><br><wbr><wbr><wbr><wbr>int backBtnID = 300;<br><wbr><wbr><wbr><wbr>Button backBtn = new Button(this);<br><wbr><wbr><wbr><wbr>backBtn.setId(backBtnID);<br><wbr><wbr><wbr><wbr>backBtn.setText("返回");<br><wbr><wbr><wbr><wbr>RelativeLayout.LayoutParams rl_lpara3 = new RelativeLayout.LayoutParams(WC, WC);<br><wbr><wbr><wbr><wbr>rl_lpara3.addRule(RelativeLayout.BELOW, editTextID);<br><wbr><wbr><wbr><wbr>rl_lpara3.addRule(RelativeLayout.ALIGN_PARENT_RIGHT); <span style="color:#ff7e00"> // 设置与父控件的相对属性</span><br><wbr><wbr><wbr><wbr>rlayout.addView(backBtn, rl_lpara3);<br><wbr><wbr><wbr><wbr><br><wbr><wbr><wbr><wbr>Button okBtn = new Button(this);<br><wbr><wbr><wbr><wbr>okBtn.setText("确定");<br><wbr><wbr><wbr><wbr>RelativeLayout.LayoutParams rl_lpara4 = new RelativeLayout.LayoutParams(WC, WC);<br><wbr><wbr><wbr><wbr>rl_lpara4.addRule(RelativeLayout.LEFT_OF, backBtnID);<br><wbr><wbr><wbr><wbr>rl_lpara4.addRule(RelativeLayout.ALIGN_TOP,backBtnID);<br><wbr><wbr><wbr><wbr>rlayout.addView(okBtn, rl_lpara4);<br><wbr><wbr><wbr><wbr><br><wbr><wbr><wbr><wbr>setContentView(rlayout);<br><wbr><wbr><wbr>}<br></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></span><span style="color:#000000">实现效果图：</span></wbr></wbr></wbr>

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// 利用代码设置表格布局
<wbr><wbr><wbr>private void setTableLayout(){<br><wbr><wbr><wbr><wbr>TableLayout tlayout = new TableLayout(this);<br><wbr><wbr><wbr><wbr>tlayout.setColumnStretchable(2, true); <span style="color:#ff7e00"> // <strong>拉长</strong>索引从0开始的第2列</span><br><wbr><wbr><wbr><wbr>TableLayout.LayoutParams tl_lpara = new TableLayout.LayoutParams(MP,WC);</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>

<wbr><br><wbr><wbr><wbr><wbr><wbr><span style="color:#ff7e00">// 1. TableRow 不需要设置 layout_width, layout_height<br><wbr><wbr><wbr><wbr><wbr>// 2. TableRow 中的控件不能设置 layout_span 属性<br></wbr></wbr></wbr></wbr></wbr></span><wbr><wbr><wbr><wbr><wbr>TableRow tr1 = new TableRow(this); <wbr><br><wbr><wbr><wbr><wbr><wbr>TextView textView0 = new TextView(this);<br><wbr><wbr><wbr><wbr>textView0.setText("第0列");<br><wbr><wbr><wbr><wbr>tr1.addView(textView0); <wbr><wbr><wbr><wbr><br><wbr><wbr><wbr><wbr>TextView textView1 = new TextView(this);<br><wbr><wbr><wbr><wbr>textView1.setText("第1列");<br><wbr><wbr><wbr><wbr>tr1.addView(textView1); <wbr><wbr><wbr><wbr><br><wbr><wbr><wbr><wbr>TextView textView2 = new TextView(this);<br><wbr><wbr><wbr><wbr>textView2.setText("第2列");<br><wbr><wbr><wbr><wbr>textView2.setBackgroundColor(Color.CYAN);<br><wbr><wbr><wbr><wbr>tr1.addView(textView2); <wbr><wbr><wbr><wbr><wbr><wbr><wbr><br><wbr><wbr><wbr><wbr>tlayout.addView(tr1, tl_lpara); <wbr><br><wbr><wbr><wbr><wbr><br><wbr><wbr><wbr><wbr>TableRow tr2 = new TableRow(this);<br><wbr><wbr><wbr><wbr>Button btn0 = new Button(this);<br><wbr><wbr><wbr><wbr>btn0.setText("按钮0");<br><wbr><wbr><wbr><wbr>tr2.addView(btn0); <wbr><wbr><wbr><wbr><br><wbr><wbr><wbr><wbr>Button btn1 = new Button(this);<br><wbr><wbr><wbr><wbr>btn1.setText("按钮1");<br><wbr><wbr><wbr><wbr>tr2.addView(btn1); <wbr><wbr><wbr><wbr><br><wbr><wbr><wbr><wbr>Button btn2 = new Button(this);<br><wbr><wbr><wbr><wbr>btn2.setText("按钮2");<br><wbr><wbr><wbr><wbr>tr2.addView(btn2); <wbr><br><wbr><wbr><wbr><wbr>Button btn3 = new Button(this);<br><wbr><wbr><wbr><wbr>btn3.setText("按钮3");<br><wbr><wbr><wbr><wbr>tr2.addView(btn3);<br><wbr><wbr><wbr><wbr>tlayout.addView(tr2, tl_lpara);<br><wbr><wbr><wbr><wbr><br><wbr><wbr><wbr><wbr>setContentView(tlayout); <wbr><wbr><wbr><wbr><br><wbr><wbr><wbr>}</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>

实现效果图: