索搜

package com.qjtc.magicalar.mvp.home;
import android.content.Intent;
import android.os.Bundle;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.Snackbar;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.text.Editable;
import android.text.TextWatcher;
import android.view.View;
import android.view.ViewGroup;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.RelativeLayout;
import android.widget.TextView;
import com.qjtc.magicalar.R;
import com.qjtc.magicalar.mvp.base.IContentView;
import com.qjtc.magicalar.mvp.base.RouterActivity;
import com.qjtc.magicalar.mvp.utils.StringUtils;

//搜索页面
public class SearchActivity extends RouterActivity implements IContentView {

    private ImageView backs;
    private EditText edit_search;
    private TextView search;
    private ImageView search_cancel;
    private CharSequence temp;

    @Override
    public int getContentView() {
        return R.layout.activity_search;
    }

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        initView();
    }

    public void initView(){
        backs =getViewById(R.id.backs);
        edit_search = getViewById(R.id.edit_search);
        search_cancel=getViewById(R.id.search_cancel);
        search=getViewById(R.id.search);
        search_cancel.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                edit_search.setText("");
            }
        });

        //输入框的监听
        edit_search.addTextChangedListener(new TextWatcher() {
            @Override
            public void beforeTextChanged(CharSequence s, int start, int count, int after) {

            }

            @Override
            public void onTextChanged(CharSequence s, int start, int before, int count) {
                temp = s;
            }

            @Override
            public void afterTextChanged(Editable s) {
                if(temp.length()>0){
                    search.setVisibility(View.VISIBLE);
                    search_cancel.setVisibility(View.VISIBLE);
                }else{
                    search.setVisibility(View.GONE);
                    search_cancel.setVisibility(View.INVISIBLE);
                }
            }
        });

    };
}

<?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:layout_width="match_parent"
    android:layout_height="match_parent"
    xmlns:fresco="http://schemas.android.com/apk/res-auto"
    android:background="#ff56b9fb"
    android:orientation="vertical"
    tools:context=".mvp.home.SearchActivity">

    <LinearLayout
        android:id="@+id/line1"
        android:layout_width="match_parent"
        android:layout_height="43dp"
        android:orientation="horizontal"
        android:background="#ff56b9fb">
        <ImageView
            android:id="@+id/backs"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginLeft="14dp"
            android:layout_gravity="center_vertical"
            android:src="@mipmap/back"/>
        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="搜索"
            android:layout_gravity="center_vertical"
            android:layout_marginLeft="135dp"
            android:textColor="#ffffffff"
            android:textSize="17dp"
            />
    </LinearLayout>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="38dp"
        android:orientation="horizontal"
        android:layout_marginTop="10dp"
        >

        <RelativeLayout
            android:layout_weight="1"
            android:background="@drawable/shape"
            android:id="@+id/relalay1"
            android:layout_marginLeft="16dp"
            android:layout_marginRight="16dp"
            android:layout_width="match_parent"
            android:layout_height="28dp">

            <ImageView
                android:id="@+id/find"
                android:layout_width="wrap_content"
                android:layout_height="match_parent"
                android:src="@mipmap/icon_ios_search"
                android:layout_marginLeft="7dp"
                android:gravity="center_vertical"
                />

            <EditText
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:hint="请输入关键字"
                android:background="@null"
                android:layout_marginLeft="10dp"
                android:textColorHint="#9B9B9B"
                android:id="@+id/edit_search"
                android:textColor="#4A4A4A"
                android:gravity="center_vertical"
                android:layout_toRightOf="@id/find"
                android:textSize="12dp"
                />
            <ImageView
                android:visibility="invisible"
                android:id="@+id/search_cancel"
                android:src="@mipmap/search_cancel"
                android:layout_marginLeft="256dp"
                android:layout_width="wrap_content"
                android:layout_height="match_parent" />
        </RelativeLayout>

        <TextView
            android:textSize="13dp"
            android:id="@+id/search"
            android:text="搜索"
            android:textColor="#ffffff"
            android:visibility="gone"
            android:gravity="center_vertical"
            android:layout_marginRight="16dp"
            android:layout_marginBottom="8dp"
            android:layout_width="wrap_content"
            android:layout_height="match_parent" />

    </LinearLayout>

    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:background="@color/colorWhite"
        ></RelativeLayout>

</LinearLayout>