EditText Verzögerung bei Aktivitätsänderung

Question

Ich verwende Text aus einem EditText, um einige Elemente in einer Listview mithilfe eines benutzerdefinierten Adapters aus einer MySQL-Datenbank abzurufen. Mit einem Klick auf eine Schaltfläche neben dem EditText starte ich eine weitere Aktivität mit intent. Die EditText funktioniert gut, wenn th App zum ersten Mal startet und öffnet sich zu MainActivity aber der Cursor stagniert für 1-2 Sekunden, wenn MainActivity von einem anderen acivity.The Code geladen wird, ist wie folgt:

activity_main.xml

<?xml version="1.0" encoding="utf-8"?> 
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
xmlns:tools="http://schemas.android.com/tools" 
android:layout_width="match_parent" 
android:layout_height="match_parent" 
tools:context="nf.co.riaah.chutte.MainActivity" 
android:orientation="vertical" 
android:background="#EEEEEE" 
android:id="@+id/linear_main"> 
<android.support.v7.widget.Toolbar 
    xmlns:app="http://schemas.android.com/apk/res-auto" 
    android:theme= "@style/ToolbarColoredBackArrow" 
    android:id="@+id/app_bar" 
    android:minHeight="?attr/actionBarSize" 
    android:layout_height="?attr/actionBarSize" 
    android:layout_width="match_parent" 
    android:background="?attr/colorPrimary" 
    android:contentInsetLeft="0dp" 
    android:contentInsetStart="0dp" 
    app:contentInsetLeft="0dp" 
    app:contentInsetStart="0dp" 
    android:contentInsetRight="0dp" 
    android:contentInsetEnd="0dp" 
    app:contentInsetRight="0dp" 
    app:contentInsetEnd="0dp"> 
<RelativeLayout 
    android:layout_width="match_parent" 
    android:layout_height="match_parent" 
    android:padding="1dp" 
    > 
    <ImageView 
     android:layout_width="150dp" 
     android:layout_height="30dp" 
     android:src="@drawable/title" 
     android:id="@+id/title_image" 
     android:layout_centerVertical="true" 
     android:layout_centerHorizontal="true" /> 

    <ImageView 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:src="@drawable/oie_transparent" 
     android:layout_alignParentRight="true" 
     android:id="@+id/cart_icon" 
     android:layout_toRightOf="@id/title_image" 
     android:layout_marginTop="2dp" 
     android:layout_marginBottom="2dp" 
     /> 
</RelativeLayout> 
</android.support.v7.widget.Toolbar> 

<LinearLayout 
    android:layout_width="match_parent" 
    android:layout_height="wrap_content" 
    android:padding="16dp" 
    android:orientation="vertical"> 


<LinearLayout 
    android:layout_width="match_parent" 
    android:layout_height="wrap_content" 
    android:orientation="horizontal" 
    android:id="@+id/search_area" 
    android:padding="5dp"> 
<EditText 
    android:layout_width="0dp" 
    android:layout_height="match_parent" 
    android:hint="Type Your Text Here" 
    android:id="@+id/gettext" 
    android:layout_weight="1"/> 
<Button 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:layout_margin="2dp" 
    android:text="Search" 
    android:layout_alignParentRight="true" 
    android:background="@drawable/circle" 
    android:textColor="#FFFFFF" 
    android:onClick="search_product" 
    /> 
</LinearLayout> 
<LinearLayout 
    android:layout_width="match_parent" 
    android:layout_height="0dp" 
    android:layout_weight="1" 
    android:padding="5dp" 
    android:orientation="vertical"> 
    <LinearLayout 
     android:layout_width="match_parent" 
     android:layout_height="0dp" 
     android:orientation="horizontal" 
     android:layout_weight="1"> 
     <LinearLayout 
      android:layout_width="0dp" 
      android:layout_height="match_parent" 
      android:layout_weight="1" 
      android:background="@drawable/circle" 
      android:layout_margin="10dp" 
      android:orientation="vertical" 

      > 

     <TextView 
      android:layout_width="match_parent" 
      android:layout_height="wrap_content" 
      android:layout_weight="1" 
      android:layout_marginRight="10dp" 
      android:layout_marginLeft="10dp" 
      android:layout_marginTop="5dp" 
      android:text="\?" 
      android:textColor="#FFFFFF" 
      android:textAlignment="center" 
      android:textSize="125dp"> 
     </TextView> 
      <TextView 
       android:layout_width="match_parent" 
       android:layout_height="wrap_content" 
       android:layout_marginRight="10dp" 
       android:layout_marginLeft="10dp" 
       android:layout_marginTop="5dp" 
       android:layout_marginBottom="5dp" 
       android:textColor="#FFFFFF" 
       android:textAlignment="center" 
       android:textSize="25dp" 
       android:text="About Us"> 
      </TextView> 
     </LinearLayout> 
     <LinearLayout 
      android:layout_width="0dp" 
      android:layout_height="match_parent" 
      android:layout_weight="1" 
      android:background="@drawable/circle" 
      android:layout_margin="10dp" 
      android:orientation="vertical"> 
      <ImageView 
       android:layout_width="match_parent" 
       android:layout_height="wrap_content" 
       android:layout_marginRight="10dp" 
       android:layout_marginLeft="10dp" 
       android:layout_marginTop="5dp" 
       android:id="@+id/re" 
       android:src="@drawable/home_clipart_edited" 
       android:layout_weight="1"/> 
      <TextView 
       android:layout_width="match_parent" 
       android:layout_height="wrap_content" 
       android:layout_marginRight="10dp" 
       android:layout_marginLeft="10dp" 
       android:layout_marginTop="5dp" 
       android:layout_marginBottom="5dp" 
       android:textColor="#FFFFFF" 
       android:textAlignment="center" 
       android:textSize="25dp" 
       android:text="Nearby Shops"/> 

     </LinearLayout> 
    </LinearLayout> 
    <LinearLayout 
     android:layout_width="match_parent" 
     android:layout_height="0dp" 
     android:orientation="horizontal" 
     android:layout_weight="1"> 
     <LinearLayout 
      android:layout_width="0dp" 
      android:layout_height="match_parent" 
      android:layout_weight="1" 
      android:background="@drawable/circle" 
      android:layout_margin="10dp" 
      android:orientation="vertical"> 
      <ImageView 
       android:layout_width="match_parent" 
       android:layout_height="wrap_content" 
       android:layout_marginRight="10dp" 
       android:layout_marginLeft="10dp" 
       android:layout_marginTop="5dp" 
       android:src="@drawable/money_clipart_edited" 
       android:layout_weight="1"/> 
      <TextView 
       android:layout_width="match_parent" 
       android:layout_height="wrap_content" 
       android:layout_marginRight="10dp" 
       android:layout_marginLeft="10dp" 
       android:layout_marginTop="10dp" 
       android:layout_marginBottom="5dp" 
       android:textColor="#FFFFFF" 
       android:textAlignment="center" 
       android:textSize="25dp" 
       android:text="Donate"/> 

     </LinearLayout> 
     <LinearLayout 
      android:layout_width="0dp" 
      android:layout_height="match_parent" 
      android:layout_weight="1" 
      android:background="@drawable/circle" 
      android:layout_margin="10dp" 
      android:orientation="vertical" 
      android:onClick="goto_list"> 
      <TextView 
       android:layout_width="match_parent" 
       android:layout_height="wrap_content" 
       android:layout_marginRight="10dp" 
       android:layout_marginLeft="10dp" 
       android:layout_marginTop="10dp" 
       android:layout_marginBottom="5dp" 
       android:textColor="#FFFFFF" 
       android:textAlignment="center" 
       android:textSize="25dp" 
       android:text="Click Here for latest"/> 

     </LinearLayout> 
    </LinearLayout> 
</LinearLayout> 
</LinearLayout> 

MainActivity.java

public class MainActivity extends AppCompatActivity { 
private EditText editText; 
public static String pname; 

@Override 
protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_main); // an example activity_main.xml is provided below 
    Toolbar tb = (Toolbar) findViewById(R.id.app_bar); 
    setSupportActionBar(tb); 
    editText = (EditText) findViewById(R.id.gettext); 
} 

public void goto_list(View view) { 
    Intent intent = new Intent(this, Search_multiple.class); 
    startActivity(intent); 
} 

public void search_product(View view) { 
    Intent intent = new Intent(this, Search_multiple.class); 
    pname = editText.getText().toString(); 
    startActivity(intent); 
} 
} 

Answer 1

Wenn Sie bei der Arbeit mit Datenbanken asynchrone Threads verwenden, hält der Cursor an, weil die zweite Absicht eine zeitraubende Operation startet, d. H. Daten aus dem mysql auf dem Hauptthread lädt.