运行此代码时出现 ANR 强制关闭
这段代码导致 ANR 强制关闭,知道如何改进这段代码吗?我尝试使用 asynctask,但无法使其在这段代码中工作:
我在这里尝试做的是 updater 活动将检查最新版本,如果有新版本,它将弹出 alertdialog要求用户在市场上更新
public class Updater extends Activity {
private int newVerCode = 0;
private String newVerName = "";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
if (getServerVerCode()) {
int vercode = Config.getVerCode(this);
if (newVerCode > vercode) {
doNewVersionUpdate();
} else {
notNewVersionShow();
}
}
}
//check version using json
private boolean getServerVerCode() {
try {
String verjson = NetworkTool.getContent(Config.UPDATE_SERVER
+ Config.UPDATE_VERJSON);
JSONArray array = new JSONArray(verjson);
if (array.length() > 0) {
JSONObject obj = array.getJSONObject(0);
try {
newVerCode = Integer.parseInt(obj.getString("verCode"));
newVerName = obj.getString("verName");
} catch (Exception e) {
newVerCode = -1;
newVerName = "";
return false;
}
}
} catch (Exception e) {
return false;
}
return true;
}
//Found No new version
private void notNewVersionShow() {
Updater.this.finish(); // End updater activity
}
//Found New version
private void doNewVersionUpdate() {
//Display alertdialog
}
}
This code is causing ANR force close any idea how to improve this code? i try with asynctask and i cant make it work in this code :
What i try to do here is updater activity will check for latest version and if got new version it will pop up alertdialog to ask user to update in the market
public class Updater extends Activity {
private int newVerCode = 0;
private String newVerName = "";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
if (getServerVerCode()) {
int vercode = Config.getVerCode(this);
if (newVerCode > vercode) {
doNewVersionUpdate();
} else {
notNewVersionShow();
}
}
}
//check version using json
private boolean getServerVerCode() {
try {
String verjson = NetworkTool.getContent(Config.UPDATE_SERVER
+ Config.UPDATE_VERJSON);
JSONArray array = new JSONArray(verjson);
if (array.length() > 0) {
JSONObject obj = array.getJSONObject(0);
try {
newVerCode = Integer.parseInt(obj.getString("verCode"));
newVerName = obj.getString("verName");
} catch (Exception e) {
newVerCode = -1;
newVerName = "";
return false;
}
}
} catch (Exception e) {
return false;
}
return true;
}
//Found No new version
private void notNewVersionShow() {
Updater.this.finish(); // End updater activity
}
//Found New version
private void doNewVersionUpdate() {
//Display alertdialog
}
}
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您可以使用 AsyncTask - 是的。在
doInBackground
中,您可以添加来自getServerVerCode()
的代码,并在onPostExecute
中添加if (getServerVerCode())
中的所有内容>。doInBackground
可以返回布尔值,因此您可以在onPostExecute
中知道结果是什么。像这样的东西:
You can use an AsyncTask - yes. In
doInBackground
you can add the code fromgetServerVerCode()
and inonPostExecute
everything in theif (getServerVerCode())
.doInBackground
can return boolean so you know inonPostExecute
what the result is.Something like this: