目录:
找到手机上所有安装的浏览器信息
对TextView更改字体
ListView 使用BaseAdapter的模板代码
使用HttpURLConnection下载JSON数据
============================================
找到手机上所有安装的浏览器信息
PackageManager localPackageManager = mActivity.getPackageManager();//ahking
Intent localIntent = new Intent("android.intent.action.VIEW");
localIntent.setData(Uri.parse("http://www.google.com"));
List<ResolveInfo> resolveInfoList = localPackageManager.queryIntentActivities(localIntent, PackageManager.MATCH_ALL);
JLog.i("size = " + resolveInfoList.size());
for (ResolveInfo r : resolveInfoList) {
CharSequence riLabel = r.loadLabel(localPackageManager);
JLog.i(riLabel);
}
对TextView更改字体
setTypeface(Typeface.create("sans-serif-condensed", Typeface.NORMAL));
ListView 使用BaseAdapter的模板代码
http://www.pcsalt.com/android/listview-using-baseadapter-android/
自己写的实现， 可以参考PasswordSettingActivity和PasswordAdapter
使用HttpURLConnection下载JSON数据
String serverUrl = "http://ce.sysu.edu.cn/hope/hopedairyjson/Index.aspx";
try {
HttpURLConnection conn = null;
URL url = new URL(serverUrl);
conn = (HttpURLConnection)url.openConnection();
conn.setConnectTimeout(5000);
conn.setRequestMethod("GET");
int code = conn.getResponseCode();
if (code == 200) {
jsonString = readStream(conn.getInputStream());
JLog.i("jsonString = " + jsonString);
}
} catch (IOException e) {
e.printStackTrace();
}
private String readStream(InputStream is) {
InputStreamReader isr;
String result= "";
try {
String line = "";
isr = new InputStreamReader(is);
BufferedReader br = new BufferedReader(isr);
while ((line = br.readLine()) != null) {
result += line;
}
} catch (IOException e) {
e.printStackTrace();
}
return result;
}
