實現(xiàn)一個登陸界面：

相對布局：

package?cn.csdn.codeui;

import?android.app.Activity;

import?android.os.Bundle;

import?android.view.ViewGroup.LayoutParams;

import?android.widget.Button;

import?android.widget.EditText;

import?android.widget.RelativeLayout;

import?android.widget.TextView;

public?class?LoginRelativeActivity?extends?Activity?{

protected?void?onCreate(Bundle?savedInstanceState)?{

super.onCreate(savedInstanceState);

initUI();

}

private?void?initUI()?{

RelativeLayout?rlayout?=?new?RelativeLayout(this);

int?id?=?100;

/**添加一個TextView*/

TextView?textView1?=?new?TextView(this);

/**android:id=""*/

textView1.setId(id);

/**android:text="用戶名："*/

textView1.setText("用戶名：");

/**android:layout_width="wrap_content"

???????????android:layout_height="wrap_content"*/

RelativeLayout.LayoutParams?textParams1?=?new?RelativeLayout.LayoutParams(

LayoutParams.WRAP_CONTENT,?LayoutParams.WRAP_CONTENT);

/**android:layout_alignParentLeft="true"*/

textParams1.addRule(RelativeLayout.ALIGN_PARENT_LEFT);

rlayout.addView(textView1,?textParams1);

//

int?id1?=?200;

EditText?userEdit?=?new?EditText(this);

userEdit.setId(id1);

RelativeLayout.LayoutParams?EditParams1?=?new?RelativeLayout.LayoutParams(

LayoutParams.FILL_PARENT,?LayoutParams.WRAP_CONTENT);

/**android:layout_toRightOf="id的值"*/

EditParams1.addRule(RelativeLayout.RIGHT_OF,?id);

rlayout.addView(userEdit,?EditParams1);

//

int?Id?=?300;

TextView?textView2?=?new?TextView(this);

textView2.setId(Id);

textView2.setText("密碼?：");

RelativeLayout.LayoutParams?TextParams2?=?new?RelativeLayout.LayoutParams(

LayoutParams.WRAP_CONTENT,?LayoutParams.WRAP_CONTENT);

TextParams2.addRule(RelativeLayout.BELOW,?id1);

rlayout.addView(textView2,?TextParams2);

//

int?Id1?=?400;

EditText?passEdit?=?new?EditText(this);

passEdit.setId(Id1);

RelativeLayout.LayoutParams?EditParams2?=?new?RelativeLayout.LayoutParams(

LayoutParams.FILL_PARENT,?LayoutParams.WRAP_CONTENT);

EditParams2.addRule(RelativeLayout.BELOW,?id1);

EditParams2.addRule(RelativeLayout.RIGHT_OF,?Id);

rlayout.addView(passEdit,?EditParams2);

//

int?Id2?=?500;

Button?login?=?new?Button(this);

login.setId(Id2);

login.setText("登陸");

RelativeLayout.LayoutParams?loginParams?=?new?RelativeLayout.LayoutParams(

LayoutParams.WRAP_CONTENT,?LayoutParams.WRAP_CONTENT);

loginParams.addRule(RelativeLayout.BELOW,?Id1);

loginParams.addRule(RelativeLayout.ALIGN_PARENT_RIGHT);

rlayout.addView(login,?loginParams);

//

Button?insert?=?new?Button(this);

insert.setText("注冊");

RelativeLayout.LayoutParams?insertParams?=?new?RelativeLayout.LayoutParams(

LayoutParams.WRAP_CONTENT,?LayoutParams.WRAP_CONTENT);

insertParams.addRule(RelativeLayout.BELOW,?Id1);

insertParams.addRule(RelativeLayout.LEFT_OF,?Id2);

rlayout.addView(insert,?insertParams);

setContentView(rlayout);

}

}效果圖：

表格布局：
package?cn.csdn.codeui;

import?android.app.Activity;

import?android.os.Bundle;

import?android.view.ViewGroup.LayoutParams;

import?android.widget.Button;

import?android.widget.EditText;

import?android.widget.TableLayout;

import?android.widget.TableRow;

import?android.widget.TextView;

public?class?LoginTableActivity?extends?Activity?{

protected?void?onCreate(Bundle?savedInstanceState)?{

super.onCreate(savedInstanceState);

initUI();

}

private?void?initUI()?{

///表格布局

TableLayout?tlayout?=?new?TableLayout(this);

tlayout.setColumnStretchable(1,?true);

///行

TableRow?tableRow1?=?new?TableRow(this);

TextView?textView1?=?new?TextView(this);

textView1.setText("用戶名：");

tableRow1.addView(textView1);

EditText?userEdit?=?new?EditText(this);

tableRow1.addView(userEdit);

tlayout.addView(tableRow1);

TableRow?tableRow2?=?new?TableRow(this);

TextView?textView2?=?new?TextView(this);

textView2.setText("密碼：");

tableRow2.addView(textView2);

EditText?passEdit?=?new?EditText(this);

tableRow2.addView(passEdit);

tlayout.addView(tableRow2);

TableRow?tableRow3?=?new?TableRow(this);

Button?btn0?=?new?Button(this);

btn0.setText("登錄");

tableRow3.addView(btn0);

Button?btn1?=?new?Button(this);

btn1.setText("注冊");

tableRow3.addView(btn1);

tlayout.addView(tableRow3);

setContentView(tlayout);

}

}效果圖：

線性布局：
package?cn.csdn.codeui;

import?android.app.Activity;

import?android.os.Bundle;

import?android.view.ViewGroup.LayoutParams;

import?android.widget.Button;

import?android.widget.EditText;

import?android.widget.LinearLayout;

import?android.widget.TextView;

public?class?LoginLinearActivity?extends?Activity?{

@Override

protected?void?onCreate(Bundle?savedInstanceState)?{

//?TODO?Auto-generated?method?stub

super.onCreate(savedInstanceState);

init();

}

private?void?init()?{

//線性布局

LinearLayout?linearLayout?=?new?LinearLayout(this);

/**android:orientation="vertical"*/

linearLayout.setOrientation(LinearLayout.VERTICAL);

LayoutParams?layoutParams?=?new?LayoutParams(LayoutParams.FILL_PARENT,

LayoutParams.FILL_PARENT);

//

TextView?userText?=?new?TextView(this);

userText.setText("用戶名：");

LayoutParams?userTextParams?=?new?LayoutParams(

LayoutParams.FILL_PARENT,?LayoutParams.WRAP_CONTENT);

linearLayout.addView(userText,?userTextParams);

????????//

EditText?userEdit?=?new?EditText(this);

LayoutParams?userEditParams?=?new?LayoutParams(

LayoutParams.FILL_PARENT,?LayoutParams.WRAP_CONTENT);

linearLayout.addView(userEdit,?userEditParams);

????????//

TextView?passText?=?new?TextView(this);

passText.setText("密碼：");

LayoutParams?passTextParams?=?new?LayoutParams(

LayoutParams.FILL_PARENT,?LayoutParams.WRAP_CONTENT);

linearLayout.addView(passText,?passTextParams);

????????//

EditText?passEdit?=?new?EditText(this);

LayoutParams?passEditParams?=?new?LayoutParams(

LayoutParams.FILL_PARENT,?LayoutParams.WRAP_CONTENT);

linearLayout.addView(passEdit,?passEditParams);

????????//

Button?login?=?new?Button(this);

login.setText("登陸");

LayoutParams?loginParams?=?new?LayoutParams(LayoutParams.FILL_PARENT,

LayoutParams.WRAP_CONTENT);

linearLayout.addView(login,?loginParams);

????????//

Button?insert?=?new?Button(this);

insert.setText("注冊");

LayoutParams?insertParams?=?new?LayoutParams(LayoutParams.FILL_PARENT,

LayoutParams.WRAP_CONTENT);

linearLayout.addView(insert,?insertParams);

setContentView(linearLayout,?layoutParams);

}

}效果圖：
url:http://greatverve.cnblogs.com/archive/2012/01/06/android-code-ui.html

?

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