介绍几个好用的android自定义控件
首先看效果图，
看下这两个界面，第一个中用到了一个自定义的FlowRadioGroup,支持复合子控件，自定义布局；
第二个界面中看到了输入的数字 自动4位分割了吧；也用到了自定义的DivisionEditText控件。
下面直接看源码FlowRadioGroup了；
1 /* 2 * Copyright (C) 2006 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package com.newgame.sdk.view; 18 19 import java.util.ArrayList; 20 21 import android.content.Context; 22 import android.content.res.TypedArray; 23 import android.util.AttributeSet; 24 import android.view.View; 25 import android.view.ViewGroup; 26 import android.widget.CompoundButton; 27 import android.widget.LinearLayout; 28 import android.widget.RadioButton; 29 30 /** 可以放多种布局控件，能找到radiobutton */ 31 public class FlowRadioGroup extends LinearLayout { 32 // holds the checked id; the selection is empty by default 33 private int mCheckedId = -1; 34 // tracks children radio buttons checked state 35 private CompoundButton.OnCheckedChangeListener mChildOnCheckedChangeListener; 36 // when true, mOnCheckedChangeListener discards events 37 private boolean mProtectFromCheckedChange = false; 38 private OnCheckedChangeListener mOnCheckedChangeListener; 39 private PassThroughHierarchyChangeListener mPassThroughListener; 40 41 // 存放当前的radioButton 42 private ArrayList<RadioButton> radioButtons; 43 44 public FlowRadioGroup(Context context) { 45 super(context); 46 setOrientation(VERTICAL); 47 init(); 48 } 49 50 public FlowRadioGroup(Context context, AttributeSet attrs) { 51 super(context, attrs); 52 init(); 53 } 54 55 private void init() { 56 mChildOnCheckedChangeListener = new CheckedStateTracker(); 57 mPassThroughListener = new PassThroughHierarchyChangeListener(); 58 super.setOnHierarchyChangeListener(mPassThroughListener); 59 radioButtons = new ArrayList<RadioButton>(); 60 } 61 62 @Override 63 public void setOnHierarchyChangeListener(OnHierarchyChangeListener listener) { 64 // the user listener is delegated to our pass-through listener 65 mPassThroughListener.mOnHierarchyChangeListener = listener; 66 } 67 68 @Override 69 protected void onFinishInflate() { 70 super.onFinishInflate(); 71 72 // checks the appropriate radio button as requested in the XML file 73 if (mCheckedId != -1) { 74 mProtectFromCheckedChange = true; 75 setCheckedStateForView(mCheckedId, true); 76 mProtectFromCheckedChange = false; 77 setCheckedId(mCheckedId); 78 } 79 } 80 81 @Override 82 public void addView(View child, int index, ViewGroup.LayoutParams params) { 83 if (child instanceof RadioButton) { 84 final RadioButton button = (RadioButton) child; 85 radioButtons.add(button); 86 87 if (button.isChecked()) { 88 mProtectFromCheckedChange = true; 89 if (mCheckedId != -1) { 90 setCheckedStateForView(mCheckedId, false); 91 } 92 mProtectFromCheckedChange = false; 93 setCheckedId(button.getId()); 94 } 95 } else if (child instanceof ViewGroup) {// 如果是复合控件 96 // 遍历复合控件 97 ViewGroup vg = ((ViewGroup) child); 98 setCheckedView(vg); 99 } 100 101 super.addView(child, index, params); 102 } 103 104 /** 查找复合控件并设置radiobutton */ 105 private void setCheckedView(ViewGroup vg) { 106 int len = vg.getChildCount(); 107 for (int i = 0; i < len; i++) { 108 if (vg.getChildAt(i) instanceof RadioButton) {// 如果找到了，就设置check状态 109 final RadioButton button = (RadioButton) vg.getChildAt(i); 110 // 添加到容器 111 radioButtons.add(button); 112 if (button.isChecked()) { 113 mProtectFromCheckedChange = true; 114 if (mCheckedId != -1) { 115 setCheckedStateForView(mCheckedId, false); 116 } 117 mProtectFromCheckedChange = false; 118 setCheckedId(button.getId()); 119 } 120 } else if (vg.getChildAt(i) instanceof ViewGroup) {// 迭代查找并设置 121 ViewGroup childVg = (ViewGroup) vg.getChildAt(i); 122 setCheckedView(childVg); 123 } 124 } 125 } 126 127 /** 查找复合控件并设置id */ 128 private void setCheckedId(ViewGroup vg) { 129 int len = vg.getChildCount(); 130 for (int i = 0; i < len; i++) { 131 if (vg.getChildAt(i) instanceof RadioButton) {// 如果找到了，就设置check状态 132 final RadioButton button = (RadioButton) vg.getChildAt(i); 133 int id = button.getId(); 134 // generates an id if it's missing 135 if (id == View.NO_ID) { 136 id = button.hashCode(); 137 button.setId(id); 138 } 139 button.setOnCheckedChangeListener(mChildOnCheckedChangeListener); 140 } else if (vg.getChildAt(i) instanceof ViewGroup) {// 迭代查找并设置 141 ViewGroup childVg = (ViewGroup) vg.getChildAt(i); 142 setCheckedId(childVg); 143 } 144 } 145 } 146 147 /** 查找radioButton控件 */ 148 public RadioButton findRadioButton(ViewGroup group) { 149 RadioButton resBtn = null; 150 int len = group.getChildCount(); 151 for (int i = 0; i < len; i++) { 152 if (group.getChildAt(i) instanceof RadioButton) { 153 resBtn = (RadioButton) group.getChildAt(i); 154 } else if (group.getChildAt(i) instanceof ViewGroup) { 155 resBtn = findRadioButton((ViewGroup) group.getChildAt(i)); 156 findRadioButton((ViewGroup) group.getChildAt(i)); 157 break; 158 } 159 } 160 return resBtn; 161 } 162 163 /** 返回当前radiobutton控件的count */ 164 public int getRadioButtonCount() { 165 return radioButtons.size(); 166 } 167 168 /** 返回当前index的radio */ 169 public RadioButton getRadioButton(int index) { 170 return radioButtons.get(index); 171 } 172 173 /** 174 * <p> 175 * Sets the selection to the radio button whose identifier is passed in 176 * parameter. Using -1 as the selection identifier clears the selection; 177 * such an operation is equivalent to invoking {@link #clearCheck()}. 178 * </p> 179 * 180 * @param id 181 * the unique id of the radio button to select in this group 182 * 183 * @see #getCheckedRadioButtonId() 184 * @see #clearCheck() 185 */ 186 public void check(int id) { 187 // don't even bother 188 if (id != -1 && (id == mCheckedId)) { 189 return; 190 } 191 192 if (mCheckedId != -1) { 193 setCheckedStateForView(mCheckedId, false); 194 } 195 196 if (id != -1) { 197 setCheckedStateForView(id, true); 198 } 199 200 setCheckedId(id); 201 } 202 203 private void setCheckedId(int id) { 204 mCheckedId = id; 205 if (mOnCheckedChangeListener != null) { 206 mOnCheckedChangeListener.onCheckedChanged(this, mCheckedId); 207 } 208 } 209 210 private void setCheckedStateForView(int viewId, boolean checked) { 211 View checkedView = findViewById(viewId); 212 if (checkedView != null && checkedView instanceof RadioButton) { 213 ((RadioButton) checkedView).setChecked(checked); 214 } 215 } 216 217 /** 218 * <p> 219 * Returns the identifier of the selected radio button in this group. Upon 220 * empty selection, the returned value is -1. 221 * </p> 222 * 223 * @return the unique id of the selected radio button in this group 224 * 225 * @see #check(int) 226 * @see #clearCheck() 227 */ 228 public int getCheckedRadioButtonId() { 229 return mCheckedId; 230 } 231 232 /** 233 * <p> 234 * Clears the selection. When the selection is cleared, no radio button in 235 * this group is selected and {@link #getCheckedRadioButtonId()} returns 236 * null. 237 * </p> 238 * 239 * @see #check(int) 240 * @see #getCheckedRadioButtonId() 241 */ 242 public void clearCheck() { 243 check(-1); 244 } 245 246 /** 247 * <p> 248 * Register a callback to be invoked when the checked radio button changes 249 * in this group. 250 * </p> 251 * 252 * @param listener 253 * the callback to call on checked state change 254 */ 255 public void setOnCheckedChangeListener(OnCheckedChangeListener listener) { 256 mOnCheckedChangeListener = listener; 257 } 258 259 /** 260 * {@inheritDoc} 261 */ 262 @Override 263 public LayoutParams generateLayoutParams(AttributeSet attrs) { 264 return new FlowRadioGroup.LayoutParams(getContext(), attrs); 265 } 266 267 /** 268 * {@inheritDoc} 269 */ 270 @Override 271 protected boolean checkLayoutParams(ViewGroup.LayoutParams p) { 272 return p instanceof FlowRadioGroup.LayoutParams; 273 } 274 275 @Override 276 protected LinearLayout.LayoutParams generateDefaultLayoutParams() { 277 return new LayoutParams(LayoutParams.WRAP_CONTENT, 278 LayoutParams.WRAP_CONTENT); 279 } 280 281 /** 282 * <p> 283 * This set of layout parameters defaults the width and the height of the 284 * children to {@link #WRAP_CONTENT} when they are not specified in the XML 285 * file. Otherwise, this class ussed the value read from the XML file. 286 * </p> 287 * 288 * <p> 289 * See {@link android.R.styleable#LinearLayout_Layout LinearLayout 290 * Attributes} for a list of all child view attributes that this class 291 * supports. 292 * </p> 293 * 294 */ 295 public static class LayoutParams extends LinearLayout.LayoutParams { 296 /** 297 * {@inheritDoc} 298 */ 299 public LayoutParams(Context c, AttributeSet attrs) { 300 super(c, attrs); 301 } 302 303 /** 304 * {@inheritDoc} 305 */ 306 public LayoutParams(int w, int h) { 307 super(w, h); 308 } 309 310 /** 311 * {@inheritDoc} 312 */ 313 public LayoutParams(int w, int h, float initWeight) { 314 super(w, h, initWeight); 315 } 316 317 /** 318 * {@inheritDoc} 319 */ 320 public LayoutParams(ViewGroup.LayoutParams p) { 321 super(p); 322 } 323 324 /** 325 * {@inheritDoc} 326 */ 327 public LayoutParams(MarginLayoutParams source) { 328 super(source); 329 } 330 331 /** 332 * <p> 333 * Fixes the child's width to 334 * {@link android.view.ViewGroup.LayoutParams#WRAP_CONTENT} and the 335 * child's height to 336 * {@link android.view.ViewGroup.LayoutParams#WRAP_CONTENT} when not 337 * specified in the XML file. 338 * </p> 339 * 340 * @param a 341 * the styled attributes set 342 * @param widthAttr 343 * the width attribute to fetch 344 * @param heightAttr 345 * the height attribute to fetch 346 */ 347 @Override 348 protected void setBaseAttributes(TypedArray a, int widthAttr, 349 int heightAttr) { 350 351 if (a.hasValue(widthAttr)) { 352 width = a.getLayoutDimension(widthAttr, "layout_width"); 353 } else { 354 width = WRAP_CONTENT; 355 } 356 357 if (a.hasValue(heightAttr)) { 358 height = a.getLayoutDimension(heightAttr, "layout_height"); 359 } else { 360 height = WRAP_CONTENT; 361 } 362 } 363 } 364 365 /** 366 * <p> 367 * Interface definition for a callback to be invoked when the checked radio 368 * button changed in this group. 369 * </p> 370 */ 371 public interface OnCheckedChangeListener { 372 /** 373 * <p> 374 * Called when the checked radio button has changed. When the selection 375 * is cleared, checkedId is -1. 376 * </p> 377 * 378 * @param group 379 * the group in which the checked radio button has changed 380 * @param checkedId 381 * the unique identifier of the newly checked radio button 382 */ 383 public void onCheckedChanged(FlowRadioGroup group, int checkedId); 384 } 385 386 private class CheckedStateTracker implements 387 CompoundButton.OnCheckedChangeListener { 388 public void onCheckedChanged(CompoundButton buttonView, 389 boolean isChecked) { 390 // prevents from infinite recursion 391 if (mProtectFromCheckedChange) { 392 return; 393 } 394 395 mProtectFromCheckedChange = true; 396 if (mCheckedId != -1) { 397 setCheckedStateForView(mCheckedId, false); 398 } 399 mProtectFromCheckedChange = false; 400 401 int id = buttonView.getId(); 402 setCheckedId(id); 403 } 404 } 405 406 /** 407 * <p> 408 * A pass-through listener acts upon the events and dispatches them to 409 * another listener. This allows the table layout to set its own internal 410 * hierarchy change listener without preventing the user to setup his. 411 * </p> 412 */ 413 private class PassThroughHierarchyChangeListener implements 414 ViewGroup.OnHierarchyChangeListener { 415 private ViewGroup.OnHierarchyChangeListener mOnHierarchyChangeListener; 416 417 public void onChildViewAdded(View parent, View child) { 418 if (parent == FlowRadioGroup.this && child instanceof RadioButton) { 419 int id = child.getId(); 420 // generates an id if it's missing 421 if (id == View.NO_ID) { 422 id = child.hashCode(); 423 child.setId(id); 424 } 425 ((RadioButton) child) 426 .setOnCheckedChangeListener(mChildOnCheckedChangeListener); 427 } else if (parent == FlowRadioGroup.this 428 && child instanceof ViewGroup) {// 如果是复合控件 429 // 查找并设置id 430 setCheckedId((ViewGroup) child); 431 } 432 433 if (mOnHierarchyChangeListener != null) { 434 mOnHierarchyChangeListener.onChildViewAdded(parent, child); 435 } 436 } 437 438 public void onChildViewRemoved(View parent, View child) { 439 if (parent == FlowRadioGroup.this && child instanceof RadioButton) { 440 ((RadioButton) child).setOnCheckedChangeListener(null); 441 } else if (parent == FlowRadioGroup.this 442 && child instanceof ViewGroup) { 443 findRadioButton((ViewGroup) child).setOnCheckedChangeListener( 444 null); 445 } 446 if (mOnHierarchyChangeListener != null) { 447 mOnHierarchyChangeListener.onChildViewRemoved(parent, child); 448 } 449 } 450 } 451 }
简单讲解下我的实现：
1)在addview方法中，加上判断，当前子控件是否为viewgroup类型
@Override public void addView(View child, int index, ViewGroup.LayoutParams params) { if (child instanceof RadioButton) { final RadioButton button = (RadioButton) child; radioButtons.add(button);//将找到的控件添加到集合中 if (button.isChecked()) { mProtectFromCheckedChange = true; if (mCheckedId != -1) { setCheckedStateForView(mCheckedId, false); } mProtectFromCheckedChange = false; setCheckedId(button.getId()); } } else if (child instanceof ViewGroup) {// 如果是复合控件 // 遍历复合控件 ViewGroup vg = ((ViewGroup) child); setCheckedView(vg); } super.addView(child, index, params); } /** 查找复合控件并设置radiobutton */ private void setCheckedView(ViewGroup vg) { int len = vg.getChildCount(); for (int i = 0; i < len; i++) { if (vg.getChildAt(i) instanceof RadioButton) {// 如果找到了，就设置check状态 final RadioButton button = (RadioButton) vg.getChildAt(i); // 添加到容器 radioButtons.add(button); if (button.isChecked()) { mProtectFromCheckedChange = true; if (mCheckedId != -1) { setCheckedStateForView(mCheckedId, false); } mProtectFromCheckedChange = false; setCheckedId(button.getId()); } } else if (vg.getChildAt(i) instanceof ViewGroup) {// 迭代查找并设置 ViewGroup childVg = (ViewGroup) vg.getChildAt(i); setCheckedView(childVg); } } }
2)定义一个数组存放当前所有查到到的radiobutton;
3)在onChildViewAdded方法中，判断新添加的子控件是否为viewgroup类型
|
1
2
3
4
5
|
else
if
(parent == FlowRadioGroup.
this
&& child
instanceof
ViewGroup) {
// 如果是复合控件
// 查找并设置id
setCheckedId((ViewGroup) child);
}
|
/** 查找复合控件并设置id */ private void setCheckedId(ViewGroup vg) { int len = vg.getChildCount(); for (int i = 0; i < len; i++) { if (vg.getChildAt(i) instanceof RadioButton) {// 如果找到了，就设置check状态 final RadioButton button = (RadioButton) vg.getChildAt(i); int id = button.getId(); // generates an id if it's missing if (id == View.NO_ID) { id = button.hashCode(); button.setId(id); } button.setOnCheckedChangeListener(mChildOnCheckedChangeListener); } else if (vg.getChildAt(i) instanceof ViewGroup) {// 迭代查找并设置 ViewGroup childVg = (ViewGroup) vg.getChildAt(i); setCheckedId(childVg); } } }
下面是DivisionEditText的源码；
1 package com.newgame.sdk.view; 2 3 import android.content.Context; 4 import android.text.Editable; 5 import android.text.TextWatcher; 6 import android.util.AttributeSet; 7 import android.view.View; 8 import android.widget.EditText; 9 10 /** 11 * 分割输入框 12 * 13 * @author Administrator 14 * 15 */ 16 public class DivisionEditText extends EditText { 17 18 /* 每组的长度 */ 19 private Integer eachLength = 4; 20 /* 分隔符 */ 21 private String delimiter = " "; 22 23 private String text = ""; 24 25 public DivisionEditText(Context context) { 26 super(context); 27 init(); 28 } 29 30 public DivisionEditText(Context context, AttributeSet attrs) { 31 super(context, attrs); 32 init(); 33 34 } 35 36 public DivisionEditText(Context context, AttributeSet attrs, int defStyle) { 37 super(context, attrs, defStyle); 38 init(); 39 } 40 41 /** 42 * 初始化 43 */ 44 public void init() { 45 46 // 内容变化监听 47 this.addTextChangedListener(new DivisionTextWatcher()); 48 // 获取焦点监听 49 this.setOnFocusChangeListener(new DivisionFocusChangeListener()); 50 } 51 52 /** 53 * 文本监听 54 * 55 * @author Administrator 56 * 57 */ 58 private class DivisionTextWatcher implements TextWatcher { 59 60 @Override 61 public void afterTextChanged(Editable s) { 62 } 63 64 @Override 65 public void beforeTextChanged(CharSequence s, int start, int count, 66 int after) { 67 } 68 69 @Override 70 public void onTextChanged(CharSequence s, int start, int before, 71 int count) { 72 // 统计个数 73 int len = s.length(); 74 if (len < eachLength)// 长度小于要求的数 75 return; 76 if (count > 1) { 77 return; 78 } 79 // 如果包含空格，就清除 80 char[] chars = s.toString().replace(" ", "").toCharArray(); 81 len = chars.length; 82 // 每4个分组,加上空格组合成新的字符串 83 StringBuffer sb = new StringBuffer(); 84 for (int i = 0; i < len; i++) { 85 if (i % eachLength == 0 && i != 0)// 每次遍历到4的倍数，就添加一个空格 86 { 87 sb.append(" "); 88 sb.append(chars[i]);// 添加字符 89 } else { 90 sb.append(chars[i]);// 添加字符 91 } 92 } 93 // 设置新的字符到文本 94 // System.out.println("*************" + sb.toString()); 95 text = sb.toString(); 96 setText(text); 97 setSelection(text.length()); 98 } 99 } 100 101 /** 102 * 获取焦点监听 103 * 104 * @author Administrator 105 * 106 */ 107 private class DivisionFocusChangeListener implements OnFocusChangeListener { 108 109 @Override 110 public void onFocusChange(View v, boolean hasFocus) { 111 if (hasFocus) { 112 // 设置焦点 113 setSelection(getText().toString().length()); 114 } 115 } 116 } 117 118 /** 得到每组个数 */ 119 public Integer getEachLength() { 120 return eachLength; 121 } 122 123 /** 设置每组个数 */ 124 public void setEachLength(Integer eachLength) { 125 this.eachLength = eachLength; 126 } 127 128 /** 得到间隔符 */ 129 public String getDelimiter() { 130 return delimiter; 131 } 132 133 /** 设置间隔符 */ 134 public void setDelimiter(String delimiter) { 135 this.delimiter = delimiter; 136 } 137 138 }
上面代码实现逻辑：在TextWatcher的onTextChanged方法中判断当前输入的字符，然后没4位添加一个空格，组成新的字符
@Override public void onTextChanged(CharSequence s, int start, int before, int count) { // 统计个数 int len = s.length(); if (len < eachLength)// 长度小于要求的数 return; if (count > 1) {// 设置新字符串的时候，直接返回 return; } // 如果包含空格，就清除 char[] chars = s.toString().replace(" ", "").toCharArray(); len = chars.length; // 每4个分组,加上空格组合成新的字符串 StringBuffer sb = new StringBuffer(); for (int i = 0; i < len; i++) { if (i % eachLength == 0 && i != 0)// 每次遍历到4的倍数，就添加一个空格 { sb.append(" "); sb.append(chars[i]);// 添加字符 } else { sb.append(chars[i]);// 添加字符 } } // 设置新的字符到文本 // System.out.println("*************" + sb.toString()); text = sb.toString(); setText(text); setSelection(text.length()); }
还有其他两个自定义控件也在项目中，这里界面没体现出来，我已经放在项目中了；
欢迎大家找出代码中的存在bug！！！！
最后附上代码下载地址：http://www.eoeandroid.com/forum.php?mod=attachment&aid=MTIwMDM1fDM5NTYzZjQ3fDEzOTY0Mjc4NDF8NzU4MzI1fDMyODQyNw%3D%3D