清除缓存

package bwie.month_practice;

import android.annotation.TargetApi;
import android.content.Intent;
import android.os.Build;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.text.format.Formatter;
import android.view.View;
import android.widget.Button;
import android.widget.ScrollView;

import com.google.gson.Gson;

import java.io.File;
import java.io.IOException;
import java.util.List;

import butterknife.Bind;
import butterknife.ButterKnife;
import bwie.month_practice.adapter.LiveRadioAdapter;
import bwie.month_practice.bean.LiveRadio;
import bwie.mylibrary.BaseActivity;
import bwie.mylibrary.OkHttpUtils;
import okhttp3.Call;
import okhttp3.Callback;
import okhttp3.Response;

public class MainActivity extends BaseActivity implements View.OnClickListener{


    @Bind(R.id.mrecycleView)
    RecyclerView mrecycleView;
    @Bind(R.id.button)
    Button button;
    @Bind(R.id.button2)
    Button button2;
Handler handler=new Handler(){
    @Override
    public void handleMessage(Message msg) {
        super.handleMessage(msg);
        String json= (String) msg.obj;
        LiveRadio liveRadio = new Gson().fromJson(json, LiveRadio.class);
        List<LiveRadio.DataBean> data = liveRadio.getData();
     mrecycleView.setLayoutManager(new LinearLayoutManager(MainActivity.this));
        mrecycleView.setAdapter(new LiveRadioAdapter(MainActivity.this,data));
        mrecycleView.setOnScrollListener(new RecyclerView.OnScrollListener() {
            @Override
            public void onScrollStateChanged(RecyclerView recyclerView, int newState) {
                super.onScrollStateChanged(recyclerView, newState);
                //RecyclerView的SCROLL_STATE_IDLE*******
                if(newState== RecyclerView.SCROLL_STATE_IDLE){
                    /**
                     *在滑动的空闲状态时 计算缓存大小
                     */
                    count();
                }

            }
        });
    }
};
    @Override
    public int bindlayout() {
        return R.layout.activity_main;
    }

    @Override
    public void initView() {
button.setOnClickListener(this);
button2.setOnClickListener(this);
    }

    @Override
    public void initdata() {

    }

    @Override
    public void loaddata() {
       //请求数据
        String url="http://www.yulin520.com/a2a/impressApi/news/mergeList?sign=C7548DE604BCB8A17592EFB9006F9265&pageSize=10&gender=2&ts=1871746850&page=1";
        OkHttpUtils.get(url, new Callback() {
            @Override
            public void onFailure(Call call, IOException e) {

            }

            @Override
            public void onResponse(Call call, Response response) throws IOException {
                String json = response.body().string();
                handler.obtainMessage(1,json).sendToTarget();
            }
        });
   //计算缓存大小
       // count();
    }

    private void count() {
        File cacheDir = getCacheDir();
        String path=cacheDir.getPath()+"/image_manager_disk_cache";
      File file=new File(path);

        File[] files = file.listFiles();
        long sumsize=0;
        for(File f:files){
            sumsize+=f.length();
        }
        button2.setText("清除缓存\n"+ Formatter.formatFileSize(this,sumsize));

    }


    @Override
    public void onClick(View view) {
        switch (view.getId()){
           case  R.id.button ://定位
 startActivity(new Intent(this,MapActivity.class));
            break;
            case R.id.button2 ://清缓存
                clear();
                count();
            break;
        }
    }

    private void clear() {
        String path = getCacheDir().getPath() + "/image_manager_disk_cache";
        File file=new File(path);
        File[] files = file.listFiles();
        for(File f:files){
            f.delete();
        }
    }
}