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在做Android开发的时候,会遇到动态添加标签让用户选择的功能,所以自己写了个例子,运行效果图如下。
标签可以左右滑动进行选择,点击的时候,会弹出toast提示选择或者取消选择了哪个标签。通过动态添加TextView作为标签,并给TextView设置背景,通过selector选择器改变其背景颜色,来确定是否处于选中状态。
代码如下所示:
1、标签的布局文件,我在标签里只设置了一个TextView
- <?xml version="1.0" encoding="utf-8"?>
- <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
- android:layout_width="match_parent"
- android:layout_height="match_parent"
- android:orientation="vertical" >
-
- <TextView
- android:id="@+id/textView1"
- android:layout_width="wrap_content"
- android:layout_height="wrap_content"
- android:layout_margin="10dp"
- android:background="@drawable/mark_select"
- android:enabled="false"
- android:padding="10dp"
- android:text="TextView" />
-
- </LinearLayout>
- <?xml version="1.0" encoding="utf-8"?>
- <selector xmlns:android="http://schemas.android.com/apk/res/android" >
-
- <item android:drawable="@drawable/mark_notbeselected" android:state_enabled="false"/>
- <item android:drawable="@drawable/mark_beselected" android:state_enabled="true"/>
-
- </selector>
当标签处于选中状态,背景为@drawable/mark_beselected,当标签处于未选中状态,背景为@drawable/mark_notbeselected
其中mark_notbeselected代码为:- <?xml version="1.0" encoding="utf-8"?>
- <shape xmlns:android="http://schemas.android.com/apk/res/android" >
-
- <solid android:color="#ffffff" />
-
- <corners android:radius="3dip" />
-
- <stroke
- android:width="1dip"
- android:color="#1cb0ba" />
-
- </shape>
mark_beselected代码为:
- <?xml version="1.0" encoding="utf-8"?>
- <shape xmlns:android="http://schemas.android.com/apk/res/android" >
-
- <solid android:color="#1cb0ba" />
-
- <corners android:radius="3dip" />
-
- <stroke
- android:width="1dip"
- android:color="#1cb0ba" />
-
- </shape>
- <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
- android:layout_width="fill_parent"
- android:layout_height="fill_parent"
- android:orientation="vertical" >
-
- <HorizontalScrollView
- android:id="@+id/horizontalScrollView1"
- android:layout_width="match_parent"
- android:layout_height="wrap_content" >
-
- <LinearLayout
- android:id="@+id/linearLayout1"
- android:layout_width="match_parent"
- android:layout_height="match_parent"
- android:orientation="horizontal" >
- </LinearLayout>
- </HorizontalScrollView>
-
- </LinearLayout>
- public class MainActivity extends Activity {
-
- List<String> list;
- private LinearLayout linearLayout;
-
- @Override
- protected void onCreate(Bundle savedInstanceState) {
- super.onCreate(savedInstanceState);
- setContentView(R.layout.activity_main);
- linearLayout = (LinearLayout) findViewById(R.id.linearLayout1);
- //添加标签内容
- list = new ArrayList<String>();
- for (int i = 0; i < 10; i++) {
- String str = "标签" + i;
- list.add(str);
- }
- //初始化标签
- initMarksView();
- }
-
- private void initMarksView() {
- for (int i = 0; i < list.size(); i++) {
- View view = View.inflate(MainActivity.this, R.layout.mark_layout, null);
- TextView tv = (TextView) view.findViewById(R.id.textView1);
- tv.setText(list.get(i));
- tv.setTag(i);
- view.setTag(false);
- // 设置view的点击事件,与onClick中的View一致
- //否则需要在onClick中,去findViewById,找出设置点击事件的控件进行操作
- //若不如此,则无法触发点击事件
- view.setOnClickListener(new OnClickListener() {
-
- @Override
- public void onClick(View v) {
- // TODO Auto-generated method stub
- TextView tv = (TextView) v.findViewById(R.id.textView1);
- Log.i("dxl", "TextView click");
- if ((Boolean) v.getTag()) {
- v.setTag(false);
- tv.setEnabled(false);
- Toast.makeText(MainActivity.this, "你取消了选择标签" + tv.getTag(), Toast.LENGTH_SHORT).show();
- } else {
- v.setTag(true);
- tv.setEnabled(true);
- Toast.makeText(MainActivity.this, "你选择了标签" + tv.getTag(), Toast.LENGTH_SHORT).show();
- }
- }
- });
- linearLayout.addView(view);
- }
- }
- }
至此,便实现了动态添加表情,并可以处理标签点击事件的功能。
源代码下载:Android 动态添加标签及其点击事件
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