Button简单实例1

1.XML按钮定义

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent" > <Button
android:id="@+id/button1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="50dp"
android:layout_marginRight="50dp"
android:text="第一个自定义按钮"
android:textColor="#ff0000" /> <Button
android:id="@+id/button2"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="100dp"
android:background="#0000ff"
android:fontFamily="宋体"
android:text="第二个中文按钮"
android:textColor="#ffffff" /> </RelativeLayout>

显示:

Button简单实例1

2.后台代码创建控件并注册事件

import android.annotation.SuppressLint;
import android.app.Activity;
import android.app.ActionBar.LayoutParams;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.LinearLayout; /**
* 简单动态产生按钮,并绑定事件
*
* @author zhongyang
*
*/
public class Button_Two extends Activity {
private LinearLayout parentLayout = null; @Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// 指定布局面板
createParentLayout();
// 创建按钮
CreateButton();
} // 产生布局面板
@SuppressLint("NewApi")
private void createParentLayout() {
parentLayout = new LinearLayout(this);
LayoutParams layoutParams = new LayoutParams(LayoutParams.MATCH_PARENT,
LayoutParams.MATCH_PARENT);
parentLayout.setLayoutParams(layoutParams);
setContentView(parentLayout);
} // 添加按钮并注册事件
@SuppressLint("NewApi")
private void CreateButton() {
Button btnOne = new Button(this);
btnOne.setText("显示其他Activity");
btnOne.setOnClickListener(new btnOneListener()); LayoutParams layoutParams = new LayoutParams(LayoutParams.MATCH_PARENT,
LayoutParams.WRAP_CONTENT);
btnOne.setLayoutParams(layoutParams); parentLayout.addView(btnOne);
} // 按钮点击事件方法
class btnOneListener implements View.OnClickListener {
public void onClick(View v) {
Button thisBtn = (Button) v;
thisBtn.setWidth(100);
thisBtn.setText("按钮点击事件触发了");
}
}
}

显示:

Button简单实例1

3.XML创建控件 注册click事件

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" > <TextView
android:id="@+id/txtOne"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="30px"
android:background="#000000"
android:paddingBottom="20px"
android:paddingLeft="20px"
android:paddingTop="20px"
android:text="按钮点击之前"
android:textColor="#ffffff" /> <Button
android:id="@+id/btnOne"
android:layout_width="100dp"
android:layout_height="50dp"
android:layout_marginTop="30px"
android:onClick="btnOneClick"
android:text="按钮One"
android:textColor="#00ff00"
android:textSize="20px" /> </LinearLayout>
import android.app.Activity;
import android.content.res.ColorStateList;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
/**
* 访问布局视图中的按钮并注册事件
* @author zhongyang
*
*/
public class ButtonThree extends Activity {
private TextView txtOne = null;
private Button btnOne = null; @Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// 设置布局视图,初始化控件
setContentView(R.layout.button_three);
txtOne = (TextView) this.findViewById(R.id.txtOne);
btnOne = (Button) this.findViewById(R.id.btnOne);
} // 按钮点击事件
public void btnOneClick(View view) {
Button btn = (Button) view;
btn.setTextSize(25); // 修改TextView的值
txtOne.setText("按钮One触发点击事件");
}
}

显示:

Button简单实例1

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