版本:1.0
日期:2014.7.24
版权:© 2014 kince 转载注明出处
在有的应用中可能需要设置一些标签来方便用去去查询某些信息,比如手机助手或者购物软件之类都会有一些标签。对于软件开发初期来说,直接使用TextView、Button实现是最为简单的一种方式。但是这种方法也有其局限性,比如不能控制换行、耦合性低等缺点。所以除了解决这些问题之外,最好能够封装一个类库出来,方便以后使用。
首先新建一个Tag类,
import java.io.Serializable; public class Tag implements Serializable { /** * */ private static final long serialVersionUID = 2684657309332033242L; private int backgroundResId ; private int id ; private boolean isChecked ; private int leftDrawableResId ; private int rightDrawableResId ; private String title; public Tag() { } public Tag( int paramInt, String paramString) { this .id = paramInt; this .title = paramString; } public int getBackgroundResId() { return this .backgroundResId ; } public int getId() { return this .id ; } public int getLeftDrawableResId() { return this .leftDrawableResId ; } public int getRightDrawableResId() { return this .rightDrawableResId ; } public String getTitle() { return this .title ; } public boolean isChecked() { return this .isChecked ; } public void setBackgroundResId( int paramInt) { this .backgroundResId = paramInt; } public void setChecked( boolean paramBoolean) { this .isChecked = paramBoolean; } public void setId(int paramInt) { this .id = paramInt; } public void setLeftDrawableResId( int paramInt) { this .leftDrawableResId = paramInt; } public void setRightDrawableResId( int paramInt) { this .rightDrawableResId = paramInt; } public void setTitle(String paramString) { this .title = paramString; } }
这个类封装了标签视图的背景图片资源、id、是否check等。
然后新建TagView类,继承自ToggleButton,
import com.niceapp.lib.tagview.R; import android.content.Context; import android.util.AttributeSet; import android.widget.ToggleButton; public class TagView extends ToggleButton { private boolean mCheckEnable = true; public TagView(Context paramContext) { super (paramContext); init(); } public TagView(Context paramContext, AttributeSet paramAttributeSet) { super (paramContext, paramAttributeSet); init(); } public TagView(Context paramContext, AttributeSet paramAttributeSet, int paramInt) { super (paramContext, paramAttributeSet, 0); init(); } private void init() { setTextOn( null ); setTextOff( null ); setText( "" ); setBackgroundResource(R.drawable. tag_bg ); } public void setCheckEnable( boolean paramBoolean) { this .mCheckEnable = paramBoolean; if (!this .mCheckEnable ) { super .setChecked( false); } } public void setChecked( boolean paramBoolean) { if (this .mCheckEnable ) { super .setChecked(paramBoolean); } } }
这个TagView就是标签视图,标签信息由他来显示。相应的xml文件如下,tag.xml:
<? xml version= "1.0" encoding = "utf-8"?> < com.niceapp.lib.tagview.widget.TagView xmlns:android ="http://schemas.android.com/apk/res/android" android:layout_width= "wrap_content" android:layout_height= "wrap_content" android:drawablePadding= "5.0dip" android:minHeight= "0.0dip" android:paddingBottom= "4.5dip" android:paddingLeft= "20.0dip" android:paddingRight= "20.0dip" android:paddingTop= "4.5dip" android:textColor= "#ff000000" android:textSize= "16.0sp" />
显示如下:
在github上有一个android-flowlayout控件,它是根据子视图的大小来动态包裹视图,如图:
因此,控制换行就可以利用这个控件去实现,无需重复发明轮子。android-flowlayout功能实现的类是FlowLayout,所以通过继承这个类来完成标签控件的实现。
import java.util.ArrayList; import java.util.List; import com.niceapp.lib.tagview.R; import android.content.Context; import android.util.AttributeSet; import android.util.TypedValue; import android.view.View; import android.view.View.OnClickListener; import android.widget.CompoundButton; /** * @author kince * */ public class TagListView extends FlowLayout implements OnClickListener { private boolean mIsDeleteMode; private OnTagCheckedChangedListener mOnTagCheckedChangedListener; private OnTagClickListener mOnTagClickListener; private int mTagViewBackgroundResId; private int mTagViewTextColorResId; private final List<Tag> mTags = new ArrayList<Tag>(); /** * @param context */ public TagListView(Context context) { super(context); // TODO Auto-generated constructor stub init(); } /** * @param context * @param attributeSet */ public TagListView(Context context, AttributeSet attributeSet) { super(context, attributeSet); // TODO Auto-generated constructor stub init(); } /** * @param context * @param attributeSet * @param defStyle */ public TagListView(Context context, AttributeSet attributeSet, int defStyle) { super(context, attributeSet, defStyle); // TODO Auto-generated constructor stub init(); } @Override public void onClick(View v) { if ((v instanceof TagView)) { Tag localTag = (Tag) v.getTag(); if (this.mOnTagClickListener != null) { this.mOnTagClickListener.onTagClick((TagView) v, localTag); } } } private void init() { } private void inflateTagView(final Tag t, boolean b) { TagView localTagView = (TagView) View.inflate(getContext(), R.layout.tag, null); localTagView.setText(t.getTitle()); localTagView.setTag(t); if (mTagViewTextColorResId <= 0) { int c = getResources().getColor(R.color.blue); localTagView.setTextColor(c); } if (mTagViewBackgroundResId <= 0) { mTagViewBackgroundResId = R.drawable.tag_bg; localTagView.setBackgroundResource(mTagViewBackgroundResId); } localTagView.setChecked(t.isChecked()); localTagView.setCheckEnable(b); if (mIsDeleteMode) { int k = (int) TypedValue.applyDimension(1, 5.0F, getContext() .getResources().getDisplayMetrics()); localTagView.setPadding(localTagView.getPaddingLeft(), localTagView.getPaddingTop(), k, localTagView.getPaddingBottom()); localTagView.setCompoundDrawablesWithIntrinsicBounds(0, 0, R.drawable.forum_tag_close, 0); } if (t.getBackgroundResId() > 0) { localTagView.setBackgroundResource(t.getBackgroundResId()); } if ((t.getLeftDrawableResId() > 0) || (t.getRightDrawableResId() > 0)) { localTagView.setCompoundDrawablesWithIntrinsicBounds( t.getLeftDrawableResId(), 0, t.getRightDrawableResId(), 0); } localTagView.setOnClickListener(this); localTagView .setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() { public void onCheckedChanged( CompoundButton paramAnonymousCompoundButton, boolean paramAnonymousBoolean) { t.setChecked(paramAnonymousBoolean); if (TagListView.this.mOnTagCheckedChangedListener != null) { TagListView.this.mOnTagCheckedChangedListener .onTagCheckedChanged( (TagView) paramAnonymousCompoundButton, t); } } }); addView(localTagView); } public void addTag(int i, String s) { addTag(i, s, false); } public void addTag(int i, String s, boolean b) { addTag(new Tag(i, s), b); } public void addTag(Tag tag) { addTag(tag, false); } public void addTag(Tag tag, boolean b) { mTags.add(tag); inflateTagView(tag, b); } public void addTags(List<Tag> lists) { addTags(lists, false); } public void addTags(List<Tag> lists, boolean b) { for (int i = 0; i < lists.size(); i++) { addTag((Tag) lists.get(i), b); } } public List<Tag> getTags() { return mTags; } public View getViewByTag(Tag tag) { return findViewWithTag(tag); } public void removeTag(Tag tag) { mTags.remove(tag); removeView(getViewByTag(tag)); } public void setDeleteMode(boolean b) { mIsDeleteMode = b; } public void setOnTagCheckedChangedListener( OnTagCheckedChangedListener onTagCheckedChangedListener) { mOnTagCheckedChangedListener = onTagCheckedChangedListener; } public void setOnTagClickListener(OnTagClickListener onTagClickListener) { mOnTagClickListener = onTagClickListener; } public void setTagViewBackgroundRes(int res) { mTagViewBackgroundResId = res; } public void setTagViewTextColorRes(int res) { mTagViewTextColorResId = res; } public void setTags(List<? extends Tag> lists) { setTags(lists, false); } public void setTags(List<? extends Tag> lists, boolean b) { removeAllViews(); mTags.clear(); for (int i = 0; i < lists.size(); i++) { addTag((Tag) lists.get(i), b); } } public static abstract interface OnTagCheckedChangedListener { public abstract void onTagCheckedChanged(TagView tagView, Tag tag); } public static abstract interface OnTagClickListener { public abstract void onTagClick(TagView tagView, Tag tag); } }
这个类最要的部分还是inflateTagView这个方法,它将TagView解析出来出来,然后显示出TagListView所要显示的标签。
最后Activity的代码如下:
import java.util.ArrayList; import java.util.List; import com.niceapp.lib.tagview.widget.Tag; import com.niceapp.lib.tagview.widget.TagListView; import android.app.Activity; import android.os.Bundle; public class MainActivity extends Activity { private TagListView mTagListView; private final List<Tag> mTags = new ArrayList<Tag>(); private final String[] titles = { "安全必备", "音乐", "父母学", "上班族必备", "360手机卫士", "QQ","输入法", "微信", "最美应用", "AndevUI", "蘑菇街" }; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.select_tag_activity); mTagListView = (TagListView) findViewById(R.id.tagview); setUpData(); mTagListView.setTags(mTags); } private void setUpData() { for (int i = 0; i < 10; i++) { Tag tag = new Tag(); tag.setId(i); tag.setChecked(true); tag.setTitle(titles[i]); mTags.add(tag); } } }
真机显示效果如下:
当然,这个TagView的外观还是可以自己设置的,包括字体、背景等等。
项目代码下载地址:http://download.csdn.net/detail/wangjinyu501/7673827
时间: 2024-10-23 19:25:25