Android流式布局实现历史搜索记录功能

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
  xmlns:app="http://schemas.android.com/apk/res-auto"
  xmlns:tools="http://schemas.android.com/tools"
  android:id="@+id/activity_main"
  android:layout_width="match_parent"
  android:layout_height="match_parent"
  android:orientation="vertical">
  <EditText
    android:id="@+id/edt"
    android:layout_width="match_parent"
    android:layout_height="wrap_content" />
  <Button
    android:id="@+id/btn"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="确定" />
  <ScrollView
    android:layout_width="match_parent"
    android:layout_height="match_parent">
    <com.zhy.view.flowlayout.TagFlowLayout
      android:id="@+id/id_flowlayout"
      android:layout_width="fill_parent"
      android:layout_height="wrap_content"
      app:max_select="-1" />
  </ScrollView>
</LinearLayout>

public class MainActivity extends AppCompatActivity {
  private TagFlowLayout mFlowLayout;
  private EditText editText;
  private Button button;
  private List<String> strings;
  //布局管理器
  private LayoutInflater mInflater;
  //流式布局的子布局
  private TextView tv;
  public Handler handler = new Handler() {
    @Override
    public void handleMessage(Message msg) {
      switch (msg.what) {
        case 1:
          mFlowLayout.setAdapter(new TagAdapter<String>(strings) {
            @Override
            public View getView(FlowLayout parent, int position, String s) {
              tv = (TextView) mInflater.inflate(R.layout.tv,
                  mFlowLayout, false);
              tv.setText(s);
              return tv;
            }
          });
          break;
      }
      super.handleMessage(msg);
    }
  };
  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    mInflater = LayoutInflater.from(this);
    mFlowLayout = (TagFlowLayout) findViewById(R.id.id_flowlayout);
    editText = (EditText) findViewById(R.id.edt);
    button = (Button) findViewById(R.id.btn);
    strings = new ArrayList<>();
    button.setOnClickListener(new View.OnClickListener() {
      @Override
      public void onClick(View v) {
        String aa = editText.getText().toString().trim();
        strings.add(aa);
        //通知handler更新UI
        handler.sendEmptyMessageDelayed(1, 0);
      }
    });
    //流式布局tag的点击方法
    mFlowLayout.setOnTagClickListener(new TagFlowLayout.OnTagClickListener() {
      @Override
      public boolean onTagClick(View view, int position, FlowLayout parent) {
        Toast.makeText(MainActivity.this, tv.getText(), Toast.LENGTH_SHORT).show();
        return true;
      }
    });
  }