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>

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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");
        }
    }
}

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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");
    }
}

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