FlowLayout流式布局实现搜索清空历史记录

compile project(':flowlayout-lib') 

<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:layout_width="match_parent"  android:layout_height="match_parent"  android:orientation="vertical"  android:padding="16dp"  tools:context="com.example.searchhistory.MainActivity">   <LinearLayout   android:layout_width="match_parent"   android:layout_height="wrap_content"   android:gravity="center_vertical"   android:orientation="horizontal">    <EditText    android:id="@+id/edt"    android:layout_width="0dp"    android:layout_height="wrap_content"    android:layout_weight="4" />    <Button    android:id="@+id/btn"    android:layout_width="0dp"    android:layout_height="wrap_content"    android:layout_weight="1"    android:text="搜索" />    <Button    android:id="@+id/clear"    android:layout_width="0dp"    android:layout_height="wrap_content"    android:layout_weight="1"    android:text="清空" />  </LinearLayout>   <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> 

<TextView xmlns:android="http://schemas.android.com/apk/res/android"  android:layout_width="wrap_content"  android:layout_height="wrap_content"  android:layout_marginLeft="5dp"  android:layout_marginRight="5dp"  android:layout_marginTop="10dp"  android:background="@drawable/tag_bg"  android:text="Helloworld"  android:textColor="#999999"  android:textSize="16sp">  </TextView> 

<?xml version="1.0" encoding="utf-8"?> <shape xmlns:android="http://schemas.android.com/apk/res/android">  <solid android:color="#ffffff" />  <corners android:radius="2dp" />  <stroke   android:width="1dp"   android:color="#dddddd" />   <padding   android:bottom="5dp"   android:left="14dp"   android:right="14dp"   android:top="5dp" />  </shape> 

<?xml version="1.0" encoding="utf-8"?> <shape xmlns:android="http://schemas.android.com/apk/res/android">  <solid android:color="#ffffff" />  <corners android:radius="2dp" />  <stroke   android:width="1dp"   android:color="#dddddd" />  <padding   android:bottom="5dp"   android:left="14dp"   android:right="14dp"   android:top="5dp" /> </shape> 

<?xml version="1.0" encoding="utf-8"?> <selector xmlns:android="http://schemas.android.com/apk/res/android">  <item android:drawable="@drawable/checked_bg" android:state_checked="true">   </item>  <item android:drawable="@drawable/normal_bg"></item> </selector> 

<?xml version="1.0" encoding="utf-8"?> <selector xmlns:android="http://schemas.android.com/apk/res/android">   <item android:color="#999999" android:state_checked="true" />  <item android:color="#f692ff" />  </selector> 

public class MainActivity extends AppCompatActivity {  private TagFlowLayout mFlowLayout;  private EditText editText;  private Button button;  private List<String> strings;  String history="";  int a=0;  List<String> historylist = new ArrayList<>();  //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.setVisibility(View.VISIBLE);        tv.setText(s);        return tv;       }      });      break;     }    super.handleMessage(msg);   }  };  private Button clearbtn;    @RequiresApi(api = Build.VERSION_CODES.M)  @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);   clearbtn = findViewById(R.id.clear);    final SharedPreferences preferences = getSharedPreferences("config", 0);   final SharedPreferences.Editor editor = preferences.edit();    strings = new ArrayList<>();   final String string = preferences.getString("string", " ");    String[] split = string.split(" ");   if (split.length>0&&!string.equals(" ")){    for (int i=0;i<split.length;i++){     strings.add(split[i]);    }    handler.sendEmptyMessageDelayed(1, 0);   }     clearbtn.setOnClickListener(new View.OnClickListener() {    @Override    public void onClick(View view) {     history="";     historylist.clear();     editor.clear().commit();     //清空下面的     strings.clear();     handler.sendEmptyMessageDelayed(1, 0);    }   });     button.setOnClickListener(new View.OnClickListener() {    @RequiresApi(api = Build.VERSION_CODES.M)    @Override    public void onClick(View v) {     String string = preferences.getString("string", "");      historylist.clear();      if (!editText.getText().toString().trim().equals("")) {      String aa = editText.getText().toString().trim();       Set<String> set = new ArraySet<>();      set.add(aa);      historylist.add(aa);      a++;      history+= aa+" ";      for (int i=0;i<historylist.size();i++){       editor.putString("string",history).commit();       strings.add(historylist.get(i));      }      //通知handler更新UI      handler.sendEmptyMessageDelayed(1, 0);     }else{      Toast.makeText(MainActivity.this, "请输入要搜索的内容", Toast.LENGTH_SHORT).show();     }    }   });   //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;    }   });  } }