FlowLayout流式布局实现搜索清空历史记录

Z时代
2024-01-10
分类：IT

本文实例为大家分享了FlowLayout实现搜索历史记录" title="清空历史记录">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; 
   } 
  }); 
 } 
}