我就是来装13的

作为学了这么一段android和java的留念吧…都是从别处copy过来为自己所用的

不得不说 Java太凶残了…用惯了python表示真心伤不起……

#######RelativeLayout的实现
package com.farproc.RLTest;

import android.app.Activity;
import android.os.Bundle;
import android.widget.*;
import android.view.*;

public class RLTest extends Activity {

private RelativeLayout rl;

private Button btn1;
private Button btn2;
private Button btn3;
private Button btn4;

private static final int ID_BTN1 = 1;
private static final int ID_BTN2 = 2;
private static final int ID_BTN3 = 3;
private static final int ID_BTN4 = 4;

/** Called when the activity is first created. */
@Override
public void onCreate(Bundle icicle) {
super.onCreate(icicle);

rl = new RelativeLayout(this);

btn1 = new Button(this);
btn1.setText(“———————-”);
btn1.setId(ID_BTN1);

RelativeLayout.LayoutParams lp1 = new RelativeLayout.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT);
lp1.addRule(RelativeLayout.ALIGN_WITH_PARENT_TOP);
lp1.addRule(RelativeLayout.CENTER_HORIZONTAL, RelativeLayout.TRUE);
// btn1 位于父 View 的顶部，在父 View 中水平居中
rl.addView(btn1, lp1 );

btn2 = new Button(this);
btn2.setText(“|\n|\n|\n|\n|\n|”);
btn2.setId(ID_BTN2);

RelativeLayout.LayoutParams lp2 = new RelativeLayout.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT);
lp2.addRule(RelativeLayout.POSITION_BELOW, ID_BTN1);
lp2.addRule(RelativeLayout.ALIGN_LEFT, ID_BTN1);
// btn2 位于 btn1 的下方、其左边和 btn1 的左边对齐
rl.addView(btn2, lp2);

btn3 = new Button(this);
btn3.setText(“|\n|\n|\n|\n|\n|”);
btn3.setId(ID_BTN3);

RelativeLayout.LayoutParams lp3 = new RelativeLayout.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT);
lp3.addRule(RelativeLayout.POSITION_BELOW, ID_BTN1);
lp3.addRule(RelativeLayout.POSITION_TO_RIGHT, ID_BTN2);
lp3.addRule(RelativeLayout.ALIGN_RIGHT, ID_BTN1);
// btn3 位于 btn1 的下方、btn2 的右方且其右边和 btn1 的右边对齐（要扩充）
rl.addView(btn3,lp3);

btn4 = new Button(this);
btn4.setText(“——————————————–”);
btn4.setId(ID_BTN4);

RelativeLayout.LayoutParams lp4 = new RelativeLayout.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT);
lp4.addRule(RelativeLayout.POSITION_BELOW, ID_BTN2);
lp4.addRule(RelativeLayout.CENTER_HORIZONTAL, RelativeLayout.TRUE);
// btn4 位于 btn2 的下方，在父 Veiw 中水平居中
rl.addView(btn4,lp4);

setContentView(rl);
}
}

#######OnClickListener监听器
button.setOnClickListener(new Button.OnClickListener()
{
@Override
public void onClick(View v)
{
//Do something
}
});

#######添加2个垂直排列的Button 非XML
@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
//定义一个LinearLayout ，参数为context在这儿即为this
final LinearLayout layout2=new LinearLayout(this);
//设置layout格式为vertical，竖直排列
layout2.setOrientation(LinearLayout.VERTICAL);
Button btn1=new Button(this);
setContentView(layout2);
Button btn2=new Button(this);
btn1.setText(“Button1″);
btn2.setText(“Button2″);
layout2.addView(btn1);
layout2.addView(btn2);
setContentView(layout2);
}

//动态添加Button
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
final LinearLayout layout2=new LinearLayout(this);
layout2.setOrientation(LinearLayout.VERTICAL);
Button btn1=new Button(this);
setContentView(layout2);
Button btn2=new Button(this);
btn1.setText(“Button1″);
btn2.setText(“Button2″);
layout2.addView(btn1);
layout2.addView(btn2);
btn1.setOnClickListener(new Button.OnClickListener() {
public void onClick(View v) {
setTitle(“点击button1″);
Button btn3=new Button(v.getContext());
layout2.addView(btn3);
btn3.setText(“Button3″);
}
});
}

#######Intent的调用
//调用一个新的Intent
Intent intent = new Intent();
intent.setClass(first.this,second.class);
first.this.startActivity(intent);