android 自定义控件有几种方式
今天是我第一次写博客，也是第一次学习写自定义控件，不足的地方望大家指正。
同时注意自定义控件的命名空间
下面是代码;
package com.example.changfangxing;
import android.os.Bundle;
import android.support.v7.app.ActionBarActivity;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Toast;
import com.example.view.ChFangX;
public class MainActivity extends ActionBarActivity {
private ChFangX mChFangX;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mChFangX = (ChFangX) findViewById(R.id.chfangx);
mChFangX.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
Toast.makeText(getApplicationContext(), mChFangX.getText(),
1000).show();
}
});
}
}
package com.example.view;
import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.util.AttributeSet;
import android.view.View;
import com.example.changfangxing.R;
/**
*
*
* @author Administrator
*
*/
public class ChFangX extends View {
// 每个边框的顏色
private int color_left;
private int color_top;
private int color_right;
private int color_bottom;
// 边框的有无
private boolean line_left;
private boolean line_top;
private boolean line_ritght;
private boolean line_bottom;
// 字
private String text;
// 画笔
// 左边线，上边，右边，底边线的画笔
private Paint pain_left, pain_top, pain_right, pain_bottom;
private Paint paintText;
private Float widths;
private Float heighs;
// 各边颜色直
public ChFangX(Context context) {
// TODO Auto-generated constructor stub
this(context, null);
}
public ChFangX(Context context, AttributeSet attrs) {
// TODO Auto-generated constructor stub
this(context, attrs, 0);
}
public ChFangX(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
// TODO Auto-generated constructor stub
TypedArray a = context.obtainStyledAttributes(attrs,
R.styleable.changfx);
color_left = a.getColor(R.styleable.changfx_color_left, Color.BLUE);
color_top = a.getColor(R.styleable.changfx_color_top, Color.BLUE);
color_bottom = a.getColor(R.styleable.changfx_color_bottom, Color.BLUE);
color_right = a.getColor(R.styleable.changfx_color_right, Color.BLUE);
line_left = a.getBoolean(R.styleable.changfx_line_left, false);
line_top = a.getBoolean(R.styleable.changfx_line_top, false);
line_ritght = a.getBoolean(R.styleable.changfx_line_right, false);
line_bottom = a.getBoolean(R.styleable.changfx_line_bottom, false);
text = a.getString(R.styleable.changfx_titleText);
widths = a.getDimension(R.styleable.changfx_widths, 20);
heighs = a.getDimension(R.styleable.changfx_heights, 20);
pain_left = new Paint();
pain_top = new Paint();
pain_right = new Paint();
pain_bottom = new Paint();
paintText = new Paint();
a.recycle();
}
@Override
protected void onDraw(Canvas canvas) {
// TODO Auto-generated method stub
super.onDraw(canvas);
// 初始化画笔
pain_left.setColor(color_left);
pain_top.setColor(color_top);
pain_right.setColor(color_right);
pain_bottom.setColor(color_bottom);
paintText.setColor(Color.BLACK);
// 初始化一个矩形
// Rect mRect = new Rect(5, 5, 200, 100);
if (line_top)
canvas.drawLine(0, 0, widths, 0, pain_top);
if (line_ritght)
canvas.drawLine(widths, 0, widths, heighs, pain_right);
if (line_bottom)
canvas.drawLine(widths, heighs, -widths, heighs, pain_bottom);
if (line_left)
canvas.drawLine(0, heighs, 0, 0, pain_left);
canvas.drawText(text, widths / 2, heighs / 2, paintText);
}
public String getText() {
return text;
}
}
attr 属性文件
main_activity wenjian
xmlns:tools="/tools"
xmlns:custom="/apk/res/com.example.changfangxing"
android:layout_width="match_parent"
android:layout_height="match_parent" >
android:id="@+id/chfangx"
android:layout_width="200dp"
android:layout_height="50dp"
android:layout_marginTop="20dp"
custom:color_left="@android:color/holo_red_light"
custom:heights="50dp"
custom:line_bottom="false"
custom:line_left="true"
custom:line_right="true"
custom:line_top="true"
custom:titleText="ok"
custom:widths="200dp" />
代码贴完
