自定义控件（17）---布局方式组合系统控件，并封装自定义控件思想(自定义CheckBox)

先看主布局

activity_main.xml（就一个自定义控件）

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.example.customerview.MainActivity" >

<com.example.customerview.CustomerView
android:layout_width="fill_parent"
android:layout_height="wrap_content" />

</RelativeLayout>

MainActivity（简单吧，就加载一个主布局文件）

package com.example.customerview;

import android.app.Activity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;

public class MainActivity extends Activity {

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}

}

来看自定义控件

CustomerView

package com.example.customerview;

import android.content.Context;
import android.util.AttributeSet;
import android.view.View;
import android.widget.LinearLayout;
import android.widget.Toast;

public class CustomerView extends LinearLayout implements View.OnClickListener {
private Context context;

public CustomerView(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
init(context);
}

public CustomerView(Context context, AttributeSet attrs) {
super(context, attrs);
init(context);
}

public CustomerView(Context context) {
super(context);
init(context);
}

/**
* 初始化
*/
private void init(Context context) {
this.context = context;
inflate(context, R.layout.childview, this);
View button1 = findViewById(R.id.button1);
View button2 = findViewById(R.id.button2);
button1.setOnClickListener(this);
button2.setOnClickListener(this);
}

@Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.button1:
Toast.makeText(context, "button1", 0).show();
break;

case R.id.button2:
Toast.makeText(context, "button2", 0).show();
break;
default:
break;
}
}

}

inflate(context, R.layout.childview, this);这行代码加载的布局

childview.xml（简单把）

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal" >

<Button
android:id="@+id/button2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Button" />

<Button
android:id="@+id/button1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Button" />

</LinearLayout>

接下来看一个自定义的CheckBox系统控件



+++++++++++++++++++++++++++++++++++++++++++开始+++++++++++++++++++++++++++++++++++++++++++

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent" >

<com.aigestudio.customviewdemo.activities.CustomCheckBox
android:id="@+id/main_ccb"
android:layout_width="fill_parent"
android:layout_height="fill_parent" >
</com.aigestudio.customviewdemo.activities.CustomCheckBox>

</LinearLayout>

view_custom_check_box.xml

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent" >

<ImageView
android:id="@+id/view_custom_check_box_on"
android:layout_width="60dp"
android:layout_gravity="center"
android:scaleType="fitCenter"
android:layout_height="60dp" />

<ImageView
android:id="@+id/view_custom_check_box_off"
android:layout_gravity="center"
android:layout_width="60dp"
android:layout_height="60dp"
android:scaleType="fitCenter" />

</FrameLayout>

MainActivity

package com.aigestudio.customviewdemo.activities;

import android.app.Activity;
import android.os.Bundle;
import android.widget.Toast;

import com.aigestudio.customviewdemo.R;
import com.aigestudio.customviewdemo.activities.CustomCheckBox.CustomCheckBoxChangeListener;

/**
* 主界面
*/
public class MainActivity extends Activity {
private CustomCheckBox ccbTest;

@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);

ccbTest = (CustomCheckBox) findViewById(R.id.main_ccb);
ccbTest.setCustomCheckBoxChangeListener(new CustomCheckBoxChangeListener() {
@Override
public void customCheckBoxOn() {
Toast.makeText(MainActivity.this, "Check on", Toast.LENGTH_SHORT).show();
}

@Override
public void customCheckBoxOff() {
Toast.makeText(MainActivity.this, "Check off", Toast.LENGTH_SHORT).show();
}
});
}
}

MeasureUtil

package com.aigestudio.customviewdemo.activities;

import android.app.Activity;
import android.graphics.Bitmap;
import android.graphics.Color;
import android.util.DisplayMetrics;

/**
* 测绘工具类
*/
public final class MeasureUtil {
/**
* 获取屏幕尺寸
*
* @param activity
*            Activity
* @return 屏幕尺寸像素值，下标为0的值为宽，下标为1的值为高
*/
public static int[] getScreenSize(Activity activity) {
DisplayMetrics metrics = new DisplayMetrics();
activity.getWindowManager().getDefaultDisplay().getMetrics(metrics);
return new int[] { metrics.widthPixels, metrics.heightPixels };
}

}

CustomCheckBox

package com.aigestudio.customviewdemo.activities;

import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.drawable.Drawable;
import android.util.AttributeSet;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.FrameLayout;
import android.widget.ImageView;

import com.aigestudio.customviewdemo.R;

/**
* 自定义CheckBox
*
*/
public class CustomCheckBox extends FrameLayout {
private ImageView ivCheckOn, ivCheckOff;// 两种状态的ImageView

private boolean isCheck;// 是否被选中的标志值

public CustomCheckBox(Context context) {
this(context, null);
}

public CustomCheckBox(Context context, AttributeSet attrs) {
this(context, attrs, 0);
}

public CustomCheckBox(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);

// 设置布局文件
LayoutInflater.from(context).inflate(R.layout.view_custom_check_box, this);

// 获取控件元素
ivCheckOn = (ImageView) findViewById(R.id.view_custom_check_box_on);
ivCheckOff = (ImageView) findViewById(R.id.view_custom_check_box_off);

// 设置两个ImageView的点击事件
ivCheckOn.setOnClickListener(new ClickListener());
ivCheckOff.setOnClickListener(new ClickListener());

int imageOnResId = getResources().getIdentifier("bluedot", "drawable" , context.getPackageName());
int imageOffResId = getResources().getIdentifier("reddot", "drawable" , context.getPackageName());

// 设置显示资源
setOnImage(imageOnResId);
setOffImage(imageOffResId);

// 默认显示的是没被选中的状态
setCheckOff();
}
/**
* 设置开启状态时CustomCheckBox的图片
*/
public void setOnImage(int resId) {
ivCheckOn.setImageResource(resId);
}

/**
* 设置关闭状态时CustomCheckBox的图片
*/
public void setOffImage(int resId) {
ivCheckOff.setImageResource(resId);
}

/**
* 设置CustomCheckBox为关闭状态
*/
public void setCheckOff() {
isCheck = false;
ivCheckOn.setVisibility(GONE);
ivCheckOff.setVisibility(VISIBLE);
}
/**
* 设置CustomCheckBox为开启状态
*/
public void setCheckOn() {
isCheck = true;
ivCheckOn.setVisibility(VISIBLE);
ivCheckOff.setVisibility(GONE);
}

/**
* 状态改变监听接口
*/
private CustomCheckBoxChangeListener customCheckBoxChangeListener;// 切换的监听器
public interface CustomCheckBoxChangeListener {
void customCheckBoxOn();
void customCheckBoxOff();
}
public void setCustomCheckBoxChangeListener(
CustomCheckBoxChangeListener customCheckBoxChangeListener) {
this.customCheckBoxChangeListener = customCheckBoxChangeListener;
}

/**
* 自定义CustomCheckBox中控件的事件监听器
*/
private class ClickListener implements OnClickListener {

@Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.view_custom_check_box_on:
setCheckOff();
customCheckBoxChangeListener.customCheckBoxOff();
break;
case R.id.view_custom_check_box_off:
setCheckOn();
customCheckBoxChangeListener.customCheckBoxOn();
break;
}
}
}
}