仿Google应用动态隐藏显示状态栏

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout  xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" tools:context="com.example.fizz.myapplication.MainActivity">

    <android.support.v7.widget.Toolbar  android:layout_width="match_parent" android:layout_height="50dp" android:id="@+id/toolbar" android:background="#000000"/>

    <ListView  android:layout_width="match_parent" android:layout_height="match_parent" android:id="@+id/mylistView"/>


</RelativeLayout>

MainActivity

package com.example.fizz.myapplication;

import android.animation.ObjectAnimator;
import android.content.Context;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.support.v7.widget.Toolbar;
import android.view.MotionEvent;
import android.view.View;
import android.view.ViewConfiguration;
import android.view.ViewGroup;
import android.widget.AbsListView;
import android.widget.ListView;
import android.widget.Toast;

import java.util.ArrayList;
import java.util.List;


public class MainActivity extends AppCompatActivity {

    private final String TAG = MainActivity.class.getSimpleName();
    private ListView mListView;
    private List<String> mDate;
    private Toolbar mToolbar;
    private ObjectAnimator mAnimator;
    private boolean mShow = false;
    private static Toast mToast;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        initView();
        initDate();

        MyAdapter adapter = new MyAdapter(getApplicationContext(), mDate);
        mListView.setAdapter(adapter);
        View header = new View(MainActivity.this);
        header.setLayoutParams(new AbsListView.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT
                , 100));
        mListView.addHeaderView(header);
        final float mTouchSlop = ViewConfiguration.get(this).getScaledTouchSlop();

// 注册listview触摸事件的监听回调
        mListView.setOnTouchListener(new View.OnTouchListener() {
            float mFirstY = 0;
            float mCurrentY = 0;
            int direction = 0;

            @Override
            public boolean onTouch(View v, MotionEvent event) {
                switch (event.getAction()) {
                    case MotionEvent.ACTION_DOWN://刚按下时
                        mFirstY = event.getY();
                        break;
                    case MotionEvent.ACTION_MOVE://移动时
                        mCurrentY = event.getY();//获取距离父布局的Y轴距离
                        if (mCurrentY - mFirstY > mTouchSlop) {
                            toast(MainActivity.this,"向下滑动");
                            direction = 0;
                        } else if (mCurrentY - mFirstY < mTouchSlop) {
                            toast(MainActivity.this,"向上滑动");
                            direction = 1;
                        }
                        if (direction == 1) {
                            if (mShow) {
                                toolbarAnim(1);
                                mShow = !mShow;
                            }
                        } else if (direction == 0) {
                            if (!mShow) {
                                toolbarAnim(0);
                                mShow = !mShow;
                            }
                        }
                        break;
                    case MotionEvent.ACTION_POINTER_UP:
                        break;
                }
                return false;
            }
        });
    }

    /** * 初始化视图 主要就是一个toolbar，来自v7包 */
    private void initView() {
        mListView = (ListView) findViewById(R.id.mylistView);
        mToolbar = (Toolbar) findViewById(R.id.toolbar);
        setSupportActionBar(mToolbar);
    }

    /** * 初始化listview的数据 */
    private void initDate() {
        mDate = new ArrayList<>();
        for (int i = 0; i < 100; i++) {
            mDate.add("this is the" + i + "date");
        }
    }

    /** * @param flag 指示动画行为的标签，为1的时时候向下滑动，状态栏消失。为0的时候向上滑动，状态栏出现。 */
    private void toolbarAnim(int flag) {
        if (mAnimator != null && mAnimator.isRunning()) {
            mAnimator.cancel();
        }
        if (flag == 0) {//向下滑动
            mAnimator = ObjectAnimator.ofFloat(mToolbar, "translationY", mToolbar.getTranslationY()
                    , 0);
        } else {//向上滑动
            mAnimator = ObjectAnimator.ofFloat(mToolbar, "translationY", mToolbar.getTranslationY()
                    , -mToolbar.getHeight());
        }
        mAnimator.start();
    }

    /** * toast管理 * @param context * @param msg */
    private static void toast(Context context,String msg){
        if (mToast == null) {
            mToast = Toast.makeText(context, msg, Toast.LENGTH_SHORT);
        }else {
            mToast.setText(msg);
        }
        mToast.show();
    }
}

MyAdapter

package com.example.fizz.myapplication;

import android.content.Context;
import android.graphics.Color;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.TextView;

import java.util.ArrayList;
import java.util.List;

/** * Created by FizZ on 2016/4/26. */
public class MyAdapter extends BaseAdapter {

    private List<String> mDate;
    private LayoutInflater mInflater;

    public MyAdapter(Context context,List<String> date) {
        mDate = new ArrayList<>();
        mDate = date;
        mInflater = LayoutInflater.from(context);
    }

    @Override
    public int getCount() {
        return mDate.size();
    }

    @Override
    public Object getItem(int position) {
        return mDate.get(position);
    }

    @Override
    public long getItemId(int position) {
        return position;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        TextView tv= null;
        if (convertView == null) {
            convertView = mInflater.inflate(android.R.layout.simple_list_item_1, null);
            tv = (TextView) convertView.findViewById(android.R.id.text1);
            convertView.setTag(tv);
        }else {
            tv = (TextView) convertView.getTag();
        }
        tv.setTextColor(Color.RED);
        tv.setText(mDate.get(position));
        return convertView;
    }
}

<resources>

    <!-- Base application theme. -->
    <style name="AppTheme" parent="Theme.AppCompat.NoActionBar"> <!-- Customize your theme here. --> <item name="colorPrimary">@color/colorPrimary</item> <item name="colorPrimaryDark">@color/colorPrimaryDark</item> <item name="colorAccent">@color/colorAccent</item> </style>

</resources>

记得app主题选择NoAcitonBar的。