Android，自定义IP控件IPEditText_android ipedittext-优快云博客

IPEditText是Android中一个自定义的IP地址输入控件，它允许用户输入IPv4地址。这个控件扩展了LinearLayout，并实现了TextWatcher接口，以监听文本变化并进行输入验证。IPEditText支持设置字体大小、颜色、边框宽度、点分隔符颜色等样式，并限制每个字段的输入范围在0-255之间。

这段时间，在写智能电表采集APP，在UI界面关于IP人性化输入上花了点时间，采用自定义控件的形式去实现。网上也有关于用TextWatcher实现IP的自定义的案例，但是存在些不足（数值范围、控件联动），本文采用TextWatcher+InputFilter+监听KEYCODE_DEL去实现。关键代码实现如下：

1.IPEditText样式：

<declare-styleable name= "IPEditText" >
<attr name= "textLength" format= "integer" />
<attr name= "IPtextSize" format= "dimension" />
<attr name= "IPtextColor" format= "color" />
<attr name= "borderColor" format= "color" />
<attr name= "borderWidth" format= "dimension" />
<attr name= "pointColor" format= "color" />
<attr name= "pointWidth" format= "dimension" />
<attr name= "editNumber" format= "integer" />
</declare-styleable>

2.IPEditText实现类：

public class IPEditText extends LinearLayout implements TextWatcher {
private static final String TAG = "IPEditText";

private int width;
private int height;
private Paint paint;

private static final int DEFAULT_TEXT_MAX_LENGTH = 3;
private static final int DEFAULT_TEXT_SIZE = 16;
private static final int DEFAULT_TEXT_COLOR = Color.BLACK;
private static final int DEFAULT_BORDER_COLOR = Color.argb(60,0,0,0);
private static final int DEFAULT_BORDER_WIDTH = 2;
private static final int DEFAULT_POINT_COLOR = Color.BLACK;
private static final int DEFAULT_POINT_WIDTH = 2;
private static final int DEFAULT_IP_EDITTEXT_LENGTH = 4;

private int textLength;
private int textSize;
private int textColor;

private int borderColor;
private int borderWidth;

private int pointColor;
private int pointWidth;
private int editNumber;

private int default_height = px2dp(20);
private int default_width = px2dp(60);

private List<EditText> data = new ArrayList<>();

public IPEditText(Context context) {
this(context, null)