android html 读写文件

1 Activity开启设置

//启用数据库
webSettings.setDatabaseEnabled(true); 
String dir = this.getApplicationContext().getDir("database", Context.MODE_PRIVATE).getPath();
//设置数据库路径
webSettings.setDatabasePath(dir);
//使用localStorage则必须打开
webSettings.setDomStorageEnabled(true);
//扩充数据库的容量(在WebChromeClinet中实现)
public void onExceededDatabaseQuota(String url, String databaseIdentifier, long currentQuota,
        long estimatedSize, long totalUsedQuota, WebStorage.QuotaUpdater quotaUpdater) {
    quotaUpdater.updateQuota(estimatedSize * 2);
}

2 WebStorage 读写文件

//清空storage
localStorage.clear();
//设置一个键值
localStorage.setItem(“yarin”,“yangfegnsheng”);
//获取一个键值
localStorage.getItem(“yarin”);
//获取指定下标的键的名称(如同Array)
localStorage.key(0);
//return “fresh” //删除一个键值
localStorage.removeItem(“yarin”);
注意一定要在设置中开启哦
setDomStorageEnabled(true)

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