Android 除了能够载入xml文件，显示布局外，也能够代码生成布局，并通过setContentView(View view)方法显示布局。单独的一层布局，如一个主布局加一个控件（如Button\imageView等）动态生成代码比較简单。以下仅仅给出演示样例代码：

package com.example.android_dongtaishengcheng;import android.os.Bundle;
import android.app.Activity;
import android.content.Intent;
import android.view.Menu;
import android.view.View;
import android.widget.Button;
import android.widget.RelativeLayout;
import android.widget.Toast;
import android.widget.RelativeLayout.LayoutParams;public class MainActivity extends Activity
{RelativeLayout relativeLayout = null;private Button button;@Overrideprotected void onCreate(Bundle savedInstanceState){super.onCreate(savedInstanceState);relativeLayout = new RelativeLayout(this);LayoutParams params = new LayoutParams(RelativeLayout.LayoutParams.MATCH_PARENT,RelativeLayout.LayoutParams.MATCH_PARENT);relativeLayout.setLayoutParams(params);relativeLayout.setBackgroundResource(R.color.back);setContentView(relativeLayout);button = new Button(this);LayoutParams params2 = new LayoutParams(300, 300);button.setLayoutParams(params2);params2.addRule(RelativeLayout.CENTER_IN_PARENT);button.setText("hello");relativeLayout.addView(button);button.setOnClickListener(new View.OnClickListener(){@Overridepublic void onClick(View v){// TODO Auto-generated method stubstartActivity(new Intent(MainActivity.this,SecondActivity.class));}});}
}

以下进入重点：多层嵌套布局的动态生成。

情景描写叙述：父布局是一个线性布局，其子布局按竖直方向排列。子布局的子布局也是一个线性布局，按水平方向排列。

事实上非常easy，关键点在于。怎样控制主布局的子布局换行显示。即实现Orientation = "vertical"。能够在子布局外在加一层布局，即以下的drawParent()方法，该方法用来生成父布局的直接子布局，drawView()方法用来生成直接子布局的子布局（该布局也是多层嵌套）。能够实现例如以下图效果：

贴出代码例如以下：

/*** */
package com.example.android_dongtaishengcheng;
import android.R.integer;
import android.app.Activity;
import android.content.Context;
import android.os.Bundle;
import android.view.Gravity;
import android.view.View;
import android.widget.Button;
import android.widget.LinearLayout;
import android.widget.RelativeLayout;
import android.widget.LinearLayout.LayoutParams;/*** @author zhiyuan* * 2014-5-29 上午10:44:44* */
public class SecondActivity extends Activity
{LinearLayout layout = null;LinearLayout line2 = null;LinearLayout line3 = null;LinearLayout line4 = null;@Overrideprotected void onCreate(Bundle savedInstanceState){// TODO Auto-generated method stubsuper.onCreate(savedInstanceState);layout = new LinearLayout(this);LayoutParams params = new LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT);layout.setLayoutParams(params);layout.setOrientation(LinearLayout.VERTICAL);setContentView(layout);// layout.addView(drawView(this));line2 = (LinearLayout) drawParent(this);line3 = (LinearLayout) drawParent(this);line4 = (LinearLayout) drawParent(this);for (int i = 0; i < 2; i++){line2.addView(drawView(SecondActivity.this, i));}for (int i = 0; i < 4; i++){line3.addView(drawView(SecondActivity.this, i));}for(int i = 0; i < 5; i++){line4.addView(drawView(SecondActivity.this, i));}layout.addView(line2);layout.addView(line3);layout.addView(line4);}//生成子布局的子布局public View drawView(Context context, int count){LinearLayout layout = new LinearLayout(context);LayoutParams params = new LayoutParams(LayoutParams.MATCH_PARENT,LayoutParams.WRAP_CONTENT, 1);params.gravity = Gravity.CENTER;layout.setOrientation(LinearLayout.HORIZONTAL);layout.setLayoutParams(params);if (count == 1){layout.setBackgroundResource(R.color.back);}RelativeLayout relativeLayout = new RelativeLayout(context);android.widget.RelativeLayout.LayoutParams params3 = new android.widget.RelativeLayout.LayoutParams(android.widget.RelativeLayout.LayoutParams.MATCH_PARENT,android.widget.RelativeLayout.LayoutParams.WRAP_CONTENT);relativeLayout.setLayoutParams(params3);/** ImageView imageView = new ImageView(context); LayoutParams params2 = new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);*/Button imageView = new Button(context);android.widget.RelativeLayout.LayoutParams params2 = new android.widget.RelativeLayout.LayoutParams(android.widget.RelativeLayout.LayoutParams.WRAP_CONTENT,android.widget.RelativeLayout.LayoutParams.WRAP_CONTENT);//imageView.setGravity(RelativeLayout.CENTER_IN_PARENT);imageView.setText("測试");params2.addRule(RelativeLayout.CENTER_IN_PARENT);// imageView.setBackgroundResource(R.drawable.ic_launcher);imageView.setLayoutParams(params2);/** TextView textView = new TextView(context); LayoutParams params3 = new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT); textView.setText("測试专用");* textView.setLayoutParams(params3);*/relativeLayout.addView(imageView);// layout.addView(textView);layout.addView(relativeLayout);return layout;}//生成主布局的子布局public View drawParent(Context context){LinearLayout layout = new LinearLayout(context);LayoutParams params = new LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.WRAP_CONTENT);// params.gravity = Gravity.CENTER_HORIZONTAL;layout.setOrientation(LinearLayout.HORIZONTAL);layout.setLayoutParams(params);return layout;}}

附Demo下载地址：http://download.csdn.net/detail/laoziyueguo3/7423939