在运行应用程序时，我在logcat窗口上遇到此错误“ Memtrack：无法加载memtrack模块” 错误。我应该创建一个json数组并解析它以便在logcat窗口中打印它。 以下代码出现此错误后。
因此，我无法在logcat中查看已解析的数组。
mainactivity.java
public class MainActivity extends Activity {
EditText cityName;
public void findWeather(View view) {
Log.i("cityName", cityName.getText().toString());
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
cityName = (EditText) findViewById(R.id.cityName);
DownloadTask task = new DownloadTask();
task.execute("https://api.openweathermap.org/data/2.5/weather?q=" +
cityName.getText().toString());
}
public class DownloadTask extends AsyncTask<String, Void, String> {
@Override
protected String doInBackground(String... urls) {
String result = null;
URL url;
HttpURLConnection urlConnection = null;
try {
url = new URL(urls[0]);
urlConnection = (HttpURLConnection) url.openConnection();
InputStream in = urlConnection.getInputStream();
InputStreamReader reader = new InputStreamReader(in);
int data = reader.read();
while (data != -1) {
char current = (char) data;
result = result + current;
data = reader.read();
}
return result;
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return "";
}
@Override
protected void onPostExecute(String result) {
super.onPostExecute(result);
try {
if (result != null) {
JSONObject jsonObject = new JSONObject(result);
String weatherInfo =
jsonObject.getString("weather");
Log.i("weather content : ", weatherInfo);
JSONArray arr = new JSONArray(weatherInfo);
for (int i = 0; i < arr.length(); i++) {
JSONObject jsonPart = arr.getJSONObject(i);
Log.i("main", jsonPart.getString("main"));
Log.i("description",
jsonPart.getString("description"));
}
}
result = null;
}
catch(JSONException e){
e.printStackTrace();
}
}
}
}
xml代码：
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity">
<ImageView
android:id="@+id/imageView2"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_alignParentStart="true"
android:layout_alignParentTop="true"
android:layout_alignParentEnd="true"
android:layout_marginStart="10dp"
android:layout_marginLeft="10dp"
android:layout_marginTop="0dp"
android:layout_marginEnd="0dp"
android:src="@drawable/background1"
app:srcCompat="?attr/actionModeBackground" />
<Button
android:id="@+id/button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:layout_marginTop="160dp"
android:onClick="findWeather"
android:text="WHAT'S THE WEATHER" />
<TextView
android:id="@+id/textView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignStart="@+id/button"
android:layout_alignParentTop="true"
android:layout_marginTop="12dp"
android:text="Enter a city .."
android:textColor="@android:color/background_light"
android:textSize="40dp" />
<EditText
android:id="@+id/cityName"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignEnd="@+id/textView"
android:layout_alignParentTop="true"
android:layout_marginLeft="40dp"
android:layout_marginTop="98dp"
android:ems="10"
android:inputType="textPersonName" />
<TextView
android:id="@+id/textView3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_centerHorizontal="true"
android:layout_marginBottom="115dp"
android:text="TextView"
android:textColor="@android:color/white"
android:textSize="30sp" />
</RelativeLayout>
android清单文件
<uses-permission android:name="android.permission.INTERNET" />
*日志猫错误*
--------- beginning of system
2018-12-06 19:56:43.275 1758-1806/? E/storaged: getDiskStats failed
with result NOT_SUPPORTED and size 0
2018-12-06 19:56:44.777 1828-2287/? W/audio_hw_generic: Not
supplying enough data to HAL, expected position 4159419 , only wrote
4006800
2018-12-06 19:56:53.271 2045-2633/system_process
I/GnssLocationProvider: WakeLock acquired by
sendMessage(REPORT_SV_STATUS, 0,
com.android.server.location.GnssLocationProvider$SvStatusInfo@704cb9c)
2018-12-06 19:56:53.272 2045-2063/system_process
I/GnssLocationProvider: WakeLock released by
handleMessage(REPORT_SV_STATUS, 0,
com.android.server.location.GnssLocationProvider$SvStatusInfo@704cb9c)
2018-12-06 19:56:53.323 2960-7959/com.google.android.gms.persistent
W/ctxmgr: [AclManager]No 2 for (accnt=account#-517948760#,
com.google.android.gms(10020):IndoorOutdoorProducer, vrsn=12862000, 0,
3pPkg = null , 3pMdlId = null , pid = 2960). Was: 3 for 57,
account#-517948760#
2018-12-06 19:57:03.273 2045-2633/system_process
I/GnssLocationProvider: WakeLock acquired by
sendMessage(REPORT_SV_STATUS, 0,
com.android.server.location.GnssLocationProvider$SvStatusInfo@807717a)
2018-12-06 19:57:03.275 2045-2063/system_process
I/GnssLocationProvider: WakeLock released by
handleMessage(REPORT_SV_STATUS, 0,
com.android.server.location.GnssLocationProvider$SvStatusInfo@807717a)
2018-12-06 19:57:03.279 2960-7959/com.google.android.gms.persistent
W/ctxmgr: [AclManager]No 2 for (accnt=account#-517948760#,
com.google.android.gms(10020):IndoorOutdoorProducer, vrsn=12862000, 0,
3pPkg = null , 3pMdlId = null , pid = 2960). Was: 3 for 57,
account#-517948760#
2018-12-06 19:57:08.084 2960-7527/com.google.android.gms.persistent
E/WakeLock: GCM_HB_ALARM release without a matched acquire!
2018-12-06 19:57:09.201 2045-4310/system_process E/memtrack:
Couldn't load memtrack module
2018-12-06 19:57:09.201 2045-4310/system_process W/android.os.Debug:
failed to get memory consumption info: -1
2018-12-06 19:57:13.274 2045-2633/system_process
I/GnssLocationProvider: WakeLock acquired by
sendMessage(REPORT_SV_STATUS, 0,
com.android.server.location.GnssLocationProvider$SvStatusInfo@42efb21)
2018-12-06 19:57:13.275 2045-2063/system_process
I/GnssLocationProvider: WakeLock released by
handleMessage(REPORT_SV_STATUS, 0,
com.android.server.location.GnssLocationProvider$SvStatusInfo@42efb21)
2018-12-06 19:57:13.279 2960-7894/com.google.android.gms.persistent
W/ctxmgr: [AclManager]No 2 for (accnt=account#-517948760#,
com.google.android.gms(10020):IndoorOutdoorProducer, vrsn=12862000, 0,
3pPkg = null , 3pMdlId = null , pid = 2960). Was: 3 for 57,
account#-517948760#