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一個空數據庫,我按照本指南Tutorial我的Android應用程序中創建一個數據庫獲取功能安卓:得到本地服務器
這裏是類似issue,但對他來說,問題是URL不是一個文件,它的一個目錄。
當我的應用程序運行時,它需要從我的本地服務器自動下載數據庫文件,該目錄爲192.168.1.150/db/wifin.db
,我從我的瀏覽器下載文件正確測試過,但是我的應用程序只能以正確的名稱獲得一個空數據庫。
情:由於這個問題,讓我的程序上的空SQLite表空例外
這裏是我的代碼。
public void createDataBase() throws IOException{
this.getReadableDatabase();
try{
copyDataBase();}
catch (IOException e){
throw new Error("Error copying database");}
}
private void copyDataBase() throws IOException{
//url of my webserver link point to my db
Thread dx = new Thread() {
public void run(){
try{
URL url = new URL("192.168.1.150/db/wifin.db");
//open a connection
URLConnection connection = url.openConnection();
connection.connect();
//Open your local db as the input stream
InputStream input = new BufferedInputStream(url.openStream());
// Path to the just created empty db
String outFileName = DB_PATH + DB_NAME;
//Open the empty db as the output stream
OutputStream output = new FileOutputStream(outFileName);
//transfer bytes from the inputfile to the outputfile
byte data[] = new byte[1024];
long total = 0;
int count;
while ((count = input.read(data)) != -1) {
total += count;
output.write(data, 0, count);
}
output.flush();
output.close();
input.close();}
catch (Exception e)
{
e.printStackTrace();
Log.i("ERROR ON DOWNLOADING FILES", "ERROR IS" +e);
}
}
};
dx.start();
}
這裏是貓登錄
10-13 22:41:34.527: W/System.err(28533): java.net.MalformedURLException: Protocol not found: 192.168.1.150/db/wifin.db
10-13 22:41:34.527: W/System.err(28533): at java.net.URL.<init>(URL.java:178)
10-13 22:41:34.527: W/System.err(28533): at java.net.URL.<init>(URL.java:127)
10-13 22:41:34.527: W/System.err(28533): at com.example.Wifin.DataBaseHelper$1.run(DataBaseHelper.java:110)
10-13 22:41:34.537: I/ERROR ON DOWNLOADING FILES(28533): ERROR ISjava.net.MalformedURLException: Protocol not found: 192.168.1.150/db/wifin.db