Android里的类别继承及对象组合

核心提示：现在开始写程序了，拿着一根扁担(Layout)和两三个畚箕(一个EditText、和两个Button)，Android里的类别继承及对象组合(2)，程序代码如下：复制到剪贴板 Java代码package com.misoo.pkaz;import android.app.Activity;import android.

现在开始写程序了，拿着一根扁担(Layout)和两三个畚箕(一个EditText、和两个Button)。

程序代码如下：

复制到剪贴板 Java代码

package com.misoo.pkaz;

import android.app.Activity;

import android.graphics.Color;

import android.os.Bundle;

import android.view.View;

import android.view.View.OnClickListener;

import android.widget.Button;

import android.widget.EditText;

import android.widget.LinearLayout;

public class ac01 extends Activity implements OnClickListener {

private final int WC = LinearLayout.LayoutParams.WRAP_CONTENT;

private final int FP = LinearLayout.LayoutParams.FILL_PARENT;

private Button btn, btn2;

private EditText et;

@Override

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

this.show_layout();

}

public void show_layout(){

LinearLayout layout = new LinearLayout(this);

layout.setOrientation(LinearLayout.VERTICAL);

et = new EditText(this);

LinearLayout.LayoutParams param =

new LinearLayout.LayoutParams(FP, WC);

layout.addView(et, param);

btn = new Button(this);

LinearLayout.LayoutParams param2 =

new LinearLayout.LayoutParams(WC, WC);

param2.topMargin = 5;

btn.setText("OK");

btn.setBackgroundResource(R.drawable.x_blue3);

btn.setOnClickListener(this);

layout.addView(btn, param2);

btn2 = new Button(this);

btn2.setText("Exit");

btn2.setTextColor(Color.RED);

btn2.setBackgroundResource(R.drawable.x_gray3);

btn2.setOnClickListener(this);

layout.addView(btn2, param2);

setContentView(layout);

}

public void onClick(View v) {

if(v == btn)

setTitle(et.getText());

else if(v == btn2)

finish();

}

}

透过layout扁担的addView()函数就将畚箕一个一个挑起来了。