FlowLayout流式布局实现搜索清空历史记录

本文实例为大家分享了FlowLayout实现搜索清空历史记录的具体代码，供大家参考，具体内容如下

效果图:点击搜索框将搜索的历史在流式布局中展示出来,清空历史记录就会将历史清空,每次搜索后都存入sp中,每次进入页面都先判断sp里是否有值并展示

首先需要导入一个module，下载地址

下载完这个工程后,需要将里面的flowlayout-lib导入到工程中,

导入工程的步骤:File - New - Import Module 选中这个flowlayout-lib

导入完成后,在项目的build.gradle中对导入的module进行依赖

compile project(':flowlayout-lib') 

activity_main.xml

<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> 

tv.xml

<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> 

drawable下面创建

checked_bg.xml

<?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> 

normal_bg.xml

<?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> 

tag_bg.xml

<?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> 

text_color.xml

<?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> 

MainActivity

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;
   }
  });
 }
} 

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