Android内存清理

直接上图吧！

获取文件大小 ，清理文件工具类

public class DataCleanManager {

    public static String getTotalCacheSize(Context context) throws Exception {
        long cacheSize = getFolderSize(context.getCacheDir());
        if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {
            cacheSize += getFolderSize(context.getExternalCacheDir());
        }
        return getFormatSize(cacheSize);
    }

    public static void clearAllCache(Context context) {
        deleteDir(context.getCacheDir());
        if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {
            deleteDir(context.getExternalCacheDir());
        }
    }

    private static boolean deleteDir(File dir) {
        if (dir != null && dir.isDirectory()) {
            String[] children = dir.list();
            for (int i = 0; i < children.length; i++) {
                boolean success = deleteDir(new File(dir, children[i]));
                if (!success) {
                    return false;
                }
            }
        }
        return dir.delete();
    }

    // 获取文件
    //Context.getExternalFilesDir() --> SDCard/Android/data/你的应用的包名/files/ 目录，一般放一些长时间保存的数据
    //Context.getExternalCacheDir() --> SDCard/Android/data/你的应用包名/cache/目录，一般存放临时缓存数据
    public static long getFolderSize(File file) throws Exception {
        long size = 0;
        try {
            File[] fileList = file.listFiles();
            for (int i = 0; i < fileList.length; i++) {
                // 如果下面还有文件
                if (fileList[i].isDirectory()) {
                    size = size + getFolderSize(fileList[i]);
                } else {
                    size = size + fileList[i].length();
                }
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
        return size;
    }

    /**
     * 格式化单位
     *
     * @param size
     * @return
     */
    public static String getFormatSize(double size) {
        double kiloByte = size / 1024;
        if (kiloByte < 1) {
//            return size + "Byte";
            return "0K";
        }

        double megaByte = kiloByte / 1024;
        if (megaByte < 1) {
            BigDecimal result1 = new BigDecimal(Double.toString(kiloByte));
            return result1.setScale(2, BigDecimal.ROUND_HALF_UP)
                    .toPlainString() + "KB";
        }

        double gigaByte = megaByte / 1024;
        if (gigaByte < 1) {
            BigDecimal result2 = new BigDecimal(Double.toString(megaByte));
            return result2.setScale(2, BigDecimal.ROUND_HALF_UP)
                    .toPlainString() + "MB";
        }

        double teraBytes = gigaByte / 1024;
        if (teraBytes < 1) {
            BigDecimal result3 = new BigDecimal(Double.toString(gigaByte));
            return result3.setScale(2, BigDecimal.ROUND_HALF_UP)
                    .toPlainString() + "GB";
        }
        BigDecimal result4 = new BigDecimal(teraBytes);
        return result4.setScale(2, BigDecimal.ROUND_HALF_UP).toPlainString()
                + "TB";
    }

}

activity 中代码

//------****** 清理缓存相关****----------
    private final int CLEAN_SUC=1001;
    private final int CLEAN_FAIL=1002;
    private void Clear() {
        getConfirmDialog(this, "是否清空缓存?", new DialogInterface.OnClickListener
                () {
            @Override
            public void onClick(DialogInterface dialogInterface, int i) {
                clearAppCache();
                hcsize.setText("0KB");
            }
        }).show();
    }
    public static AlertDialog.Builder getConfirmDialog(Context context, String message, DialogInterface.OnClickListener onClickListener) {
        AlertDialog.Builder builder = getDialog(context);
        builder.setMessage(Html.fromHtml(message));
        builder.setPositiveButton("确定", onClickListener);
        builder.setNegativeButton("取消", null);
        return builder;
    }
    public static AlertDialog.Builder getDialog(Context context) {
        AlertDialog.Builder builder = new AlertDialog.Builder(context);
        return builder;
    }

    /**
     * 清除app缓存
     */
    public void myclearaAppCache() {

        // 清除数据缓存
        DataCleanManager.clearAllCache(this);
        // 2.2版本才有将应用缓存转移到sd卡的功能
        // 清除编辑器保存的临时内容
        Properties props = getProperties();
        for (Object key : props.keySet()) {
            String _key = key.toString();
            if (_key.startsWith("temp"))
                removeProperty(_key);
        }

        KLog.e("清除缓存");
//        Core.getKJBitmap().cleanCache();

    }

    /**
     * 清除保存的缓存
     */
    public Properties getProperties() {
        return AppConfig.getAppConfig(this).get();
    }
    public void removeProperty(String... key) {
        AppConfig.getAppConfig(this).remove(key);
    }
    /**
     * 清除app缓存
     *
     * @param
     */
    public void clearAppCache() {

        new Thread() {
            @Override
            public void run() {
                Message msg = new Message();
                try {
                    myclearaAppCache();
                    msg.what = CLEAN_SUC;
                } catch (Exception e) {
                    e.printStackTrace();
                    msg.what = CLEAN_FAIL;
                }
                handler.sendMessage(msg);
            }
        }.start();
    }
    private Handler handler = new Handler() {
        public void handleMessage(android.os.Message msg) {
            switch (msg.what) {
                case CLEAN_FAIL:
                    Toast.makeText(MySetClass.this,"清除失败",Toast.LENGTH_LONG).show();
                    break;
                case CLEAN_SUC:

                    Toast.makeText(MySetClass.this,"清除成功",Toast.LENGTH_LONG).show();
                    break;
            }
        };
    };

运行结果如下：