Android仿简书动态searchview搜索栏效果（修改版）

     

原文档：https://www.jb51.net/article/116797.htm

依赖：

//Transition框架
implementation'com.android.support:design:27.1.1'
//（黄油刀使用依赖）
implementation 'com.jakewharton:butterknife:8.8.1'
annotationProcessor 'com.jakewharton:butterknife-compiler:8.8.1'

布局文件：

圆角设置：

Activity：

package com.example.dell.searchdome;

import android.graphics.Color;
import android.os.Build;
import android.os.Bundle;
import android.support.transition.AutoTransition;
import android.support.transition.TransitionManager;
import android.support.transition.TransitionSet;
import android.support.v4.view.ViewCompat;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.View;
import android.view.ViewGroup;
import android.view.WindowManager;
import android.widget.EditText;
import android.widget.LinearLayout;
import android.widget.RelativeLayout;
import butterknife.BindView;
import butterknife.ButterKnife;

public class MainActivity extends AppCompatActivity {

    @BindView(R.id.tv_search)
    EditText tvSearch;
    @BindView(R.id.ll_search)
    LinearLayout llSearch;
    @BindView(R.id.toolbar)
    Toolbar toolbar;
    boolean isExpand = false;
    private TransitionSet mSet;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        ButterKnife.bind(this);
        //设置全屏透明状态栏
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
            getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
            ViewGroup rootView = (ViewGroup) ((ViewGroup) findViewById(android.R.id.content)).getChildAt(0);
            ViewCompat.setFitsSystemWindows(rootView, false);
            rootView.setClipToPadding(true);
        }
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
            getWindow().clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS |
                    WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION);
            getWindow().getDecorView().setSystemUiVisibility(View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN | View.SYSTEM_UI_FLAG_LAYOUT_STABLE);
            getWindow().addFlags(WindowManager.LayoutParams.FLAG_DRAWS_SYSTEM_BAR_BACKGROUNDS);

            getWindow().setStatusBarColor(Color.TRANSPARENT);
        }
        //设置toolbar初始透明度为0
        toolbar.getBackground().mutate().setAlpha(0);
        //搜索框点击事件
        llSearch.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if (!isExpand){
                    expand();
                    isExpand = true;
                }else if(isExpand){
                    reduce();
                    isExpand = false;
                }

            }
        });

         tvSearch.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if (!isExpand){
                    expand();
                    isExpand = true;
                }else if(isExpand){
                    reduce();
                    isExpand = false;
                }

            }
        });

    }
    private void expand() {
        //设置伸展状态时的布局
        tvSearch.setText("");
        tvSearch.setHint("搜索你想搜索的内容");
        RelativeLayout.LayoutParams LayoutParams = (RelativeLayout.LayoutParams) llSearch.getLayoutParams();
        LayoutParams.width = LayoutParams.MATCH_PARENT;
        LayoutParams.setMargins(dip2px(10), dip2px(10), dip2px(10), dip2px(10));
        llSearch.setLayoutParams(LayoutParams);
        //开始动画
        beginDelayedTransition(llSearch);
    }

    private void reduce() {
        //设置收缩状态时的布局
        tvSearch.setText("搜索");
        tvSearch.setHint("");
        RelativeLayout.LayoutParams LayoutParams = (RelativeLayout.LayoutParams) llSearch.getLayoutParams();
        LayoutParams.width = dip2px(80);
        LayoutParams.setMargins(dip2px(10), dip2px(10), dip2px(10), dip2px(10));
        llSearch.setLayoutParams(LayoutParams);
        //开始动画
        beginDelayedTransition(llSearch);
    }

    void beginDelayedTransition(ViewGroup view) {
        mSet = new AutoTransition();
        mSet.setDuration(300);
        TransitionManager.beginDelayedTransition(view, mSet);
    }

    private int dip2px(float dpVale) {
        final float scale = getResources().getDisplayMetrics().density;
        return (int) (dpVale * scale + 0.5f);
    }
    }