这期内容当中小编将会给大家带来有关怎么在Android中通过自定义View实现任意布局,文章内容丰富且以专业的角度为大家分析和叙述,阅读完这篇文章希望大家可以有所收获。
RelativeRadioGroup
public class RelativeRadioGroup extends RelativeLayout implements CompoundButton.OnCheckedChangeListener { private int checkId = -1; private CompoundButton.OnCheckedChangeListener mChildOnCheckedChangeListener; public RelativeRadioGroup(Context context) { super(context); } public RelativeRadioGroup(Context context, AttributeSet attrs) { super(context, attrs); } public RelativeRadioGroup(Context context, AttributeSet attrs, int defStyleAttr) { super(context, attrs, defStyleAttr); } @Override protected void onLayout(boolean changed, int l, int t, int r, int b) { super.onLayout(changed, l, t, r, b); //添加监听 for (int i = 0; i < getChildCount(); i++) { View v = getChildAt(i); if (v instanceof RadioButton && !(v instanceof CompoundButton.OnCheckedChangeListener)) { ((RadioButton) v).setOnCheckedChangeListener(this); } } } @Override public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) { setCheck(buttonView.getId(), isChecked); } public void check(@IdRes int checkId) { if (checkId == -1 || this.checkId == checkId) { return; } setCheck(checkId, true); } public void clearCheck() { setCheck(-1, false); } public int getCheckedRadioButtonId() { return this.checkId; } /** * 设置选中状态 */ private void setCheck(@IdRes int checkId, boolean isChecked) { if (checkId != -1 && this.checkId == checkId) { return; } if (checkId != -1) { CompoundButton view = (CompoundButton) findViewById(checkId); //未选中的RadioButton被选中 if (checkId != this.checkId && isChecked) { this.checkId = checkId; if (mChildOnCheckedChangeListener != null) { mChildOnCheckedChangeListener.onCheckedChanged(view, true); } //某个RadioButton被选中,将其他的改为未选中 for (int i = 0; i < getChildCount(); i++) { View v = getChildAt(i); if (v instanceof RadioButton && v.getId() != checkId) { ((RadioButton) v).setChecked(false); } else if (v instanceof RadioButton && v.getId() == checkId) { ((RadioButton) v).setChecked(true); } } } //被选中的RadioButton被取消选中 if (checkId == this.checkId && !isChecked) { this.checkId = checkId; if (mChildOnCheckedChangeListener != null) { mChildOnCheckedChangeListener.onCheckedChanged(view, false); } } } else { //清空所有选择 if (this.checkId != -1) { this.checkId = -1; CompoundButton view = (CompoundButton) findViewById(this.checkId); //将选中的置为未选中 if (view instanceof RadioButton) { view.setChecked(false); } } } } public void setOnCheckedChangeListener(CompoundButton.OnCheckedChangeListener mChildOnCheckedChangeListener) { this.mChildOnCheckedChangeListener = mChildOnCheckedChangeListener; } }
Android是一种基于Linux内核的自由及开放源代码的操作系统,主要使用于移动设备,如智能手机和平板电脑,由美国Google公司和开放手机联盟领导及开发。
上述就是小编为大家分享的怎么在Android中通过自定义View实现任意布局了,如果刚好有类似的疑惑,不妨参照上述分析进行理解。如果想知道更多相关知识,欢迎关注亿速云行业资讯频道。
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