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我被告知有一種方法可以清理我的代碼以使其運行速度更快。我應該能夠重用變量,所以我不必一次又一次地鍵入它們。因此,作爲回報,當加載時間到來時應該讓我更快地閱讀我的文件,但我似乎無法弄清楚如何做到這一點。我的代碼工作得很好,但效率不高。加載文件以提高效率
InputStream in = myContext.getResources().openRawResource(R.raw.sql1);
BufferedReader br = new BufferedReader(new InputStreamReader(in));
String xmlFile = br.readLine();
DocumentBuilder builder = DocumentBuilderFactory.newInstance().newDocumentBuilder();
Document doc = builder.parse(xmlFile);
NodeList statements = doc.getElementsByTagName("statement");
for (int i=0; i<statements.getLength(); i++) {
s = statements.item(i).getChildNodes().item(0).getNodeValue();
db.execSQL(s);
}
in.close();
doc = null;
statements = null;
in = null;
br.close();
br = null;
InputStream in2 = myContext.getResources().openRawResource(R.raw.sql2);
BufferedReader br2 = new BufferedReader(new InputStreamReader(in2));
String xmlFile2 = br2.readLine();
Document doc2 = builder.parse(xmlFile2);
NodeList statements2 = doc2.getElementsByTagName("statement");
for (int i=0; i<statements2.getLength(); i++) {
s = statements2.item(i).getChildNodes().item(0).getNodeValue();
db.execSQL(s);
}
in2.close();
doc2 = null;
statements2 = null;
in2 = null;
br2.close();
br2 = null;
InputStream in3 = myContext.getResources().openRawResource(R.raw.sql3);
BufferedReader br3 = new BufferedReader(new InputStreamReader(in3));
String xmlFile3 = br3.readLine();
Document doc3 = builder.parse(xmlFile3);
NodeList statements3 = doc3.getElementsByTagName("statement");
for (int i=0; i<statements3.getLength(); i++) {
s = statements3.item(i).getChildNodes().item(0).getNodeValue();
db.execSQL(s);
}
in3.close();
doc3 = null;
statements3 = null;
in3 = null;
br3.close();
br3 = null;
InputStream in4 = myContext.getResources().openRawResource(R.raw.sql4);
BufferedReader br4 = new BufferedReader(new InputStreamReader(in4));
String xmlFile4 = br4.readLine();
Document doc4 = builder.parse(xmlFile4);
NodeList statements4 = doc4.getElementsByTagName("statement");
for (int i=0; i<statements4.getLength(); i++) {
s = statements4.item(i).getChildNodes().item(0).getNodeValue();
db.execSQL(s);
}
in4.close();
doc4 = null;
statements4 = null;
in4 = null;
br4.close();
br4 = null;
InputStream in5 = myContext.getResources().openRawResource(R.raw.sql5);
BufferedReader br5 = new BufferedReader(new InputStreamReader(in5));
String xmlFile5 = br5.readLine();
Document doc5 = builder.parse(xmlFile5);
NodeList statements5 = doc5.getElementsByTagName("statement");
for (int i=0; i<statements5.getLength(); i++) {
s = statements5.item(i).getChildNodes().item(0).getNodeValue();
db.execSQL(s);
}
in5.close();
doc5 = null;
statements5 = null;
in5 = null;
br5.close();
br5 = null;