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Hallo, ich bin ziemlich neu in Android Studio und ich baue eine App für mein Schulprojekt. Ich habe eine Array-Liste von ImageButtons, die generiert wird, und ich muss sie in Zeilen in meiner TableView zuweisen, damit es wie eine Periodentabelle aussieht. Allerdings halten Empfang ich diesen Fehler:Das angegebene Kind hat bereits einen Elternteil. Was vermisse ich
package ros_dhhiggins.example.com.periodictable;
import android.content.Context;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.ViewGroup;
import android.widget.ImageButton;
import android.widget.TableLayout;
import android.widget.TableRow;
public class PeriodicTableScreen extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_periodic_table_screen);
TableLayout table = (TableLayout) findViewById(R.id.LayoutTable);
createButtons newButtons = new createButtons(this);
tableGen(table, newButtons);
}
public void tableGen(TableLayout table, createButtons newButtons) {
ImageButton[] imageButtons;
imageButtons = newButtons.build();
for(int j = 1; j <= 7; j++){
TableRow tempRow = new TableRow(this);
if(j==1) {
tempRow.setLayoutParams(new TableRow.LayoutParams(TableRow.LayoutParams.MATCH_PARENT,
TableRow.LayoutParams.WRAP_CONTENT));
for (int temp = 0; temp <= 17; temp++) {
ImageButton tempButton = imageButtons[temp];
tempButton.setLayoutParams(new TableRow.LayoutParams(TableRow.LayoutParams.MATCH_PARENT,
TableRow.LayoutParams.WRAP_CONTENT));
tempRow.addView(imageButtons[temp]);
}
}
else if (j==2){
for(int temp = 18; temp <=35; temp++){
TableRow rowOne = new TableRow(this);
rowOne.setLayoutParams(new TableRow.LayoutParams(TableRow.LayoutParams.MATCH_PARENT,
TableRow.LayoutParams.WRAP_CONTENT));
ImageButton tempButton = imageButtons[temp];
tempButton.setLayoutParams(new TableRow.LayoutParams(TableRow.LayoutParams.MATCH_PARENT,
TableRow.LayoutParams.WRAP_CONTENT));
tempRow.addView(imageButtons[temp-1]);
}
}
else if (j==3){
TableRow rowOne = new TableRow(this);
rowOne.setLayoutParams(new TableRow.LayoutParams(TableRow.LayoutParams.MATCH_PARENT,
TableRow.LayoutParams.WRAP_CONTENT));
for(int temp = 36; temp <=53; temp++){
ImageButton tempButton = imageButtons[temp];
tempButton.setLayoutParams(new TableRow.LayoutParams(TableRow.LayoutParams.MATCH_PARENT,
TableRow.LayoutParams.WRAP_CONTENT));
tempRow.addView(imageButtons[temp-1]);
}
}
else if (j==4){
TableRow rowOne = new TableRow(this);
rowOne.setLayoutParams(new TableRow.LayoutParams(TableRow.LayoutParams.MATCH_PARENT,
TableRow.LayoutParams.WRAP_CONTENT));
for(int temp = 54; temp <=71; temp++){
ImageButton tempButton = imageButtons[temp];
tempButton.setLayoutParams(new TableRow.LayoutParams(TableRow.LayoutParams.MATCH_PARENT,
TableRow.LayoutParams.WRAP_CONTENT));
tempRow.addView(imageButtons[temp-1]);
}
}
else if (j==5){
TableRow rowOne = new TableRow(this);
rowOne.setLayoutParams(new TableRow.LayoutParams(TableRow.LayoutParams.MATCH_PARENT,
TableRow.LayoutParams.WRAP_CONTENT));
for(int temp = 72; temp <=89; temp++){
ImageButton tempButton = imageButtons[temp];
tempButton.setLayoutParams(new TableRow.LayoutParams(TableRow.LayoutParams.MATCH_PARENT,
TableRow.LayoutParams.WRAP_CONTENT));
tempRow.addView(imageButtons[temp-1]);
}
}
else if (j==6){
for(int temp = 90; temp <=107; temp++){
ImageButton tempButton = imageButtons[temp];
tempButton.setLayoutParams(new TableRow.LayoutParams(TableRow.LayoutParams.MATCH_PARENT,
TableRow.LayoutParams.WRAP_CONTENT));
tempRow.addView(imageButtons[temp-1]);
}
}
else if (j==7){
for(int temp = 108; temp <=125; temp++){
ImageButton tempButton = imageButtons[temp];
tempButton.setLayoutParams(new TableRow.LayoutParams(TableRow.LayoutParams.MATCH_PARENT,
TableRow.LayoutParams.WRAP_CONTENT));
tempRow.addView(imageButtons[temp-1]);
}
}
table.addView(tempRow, new TableLayout.LayoutParams(TableLayout.LayoutParams.MATCH_PARENT,
TableLayout.LayoutParams.WRAP_CONTENT));
((ViewGroup) tempRow.getParent()).removeView(tempRow);
}
}
}
Wenn es irgendeine andere Informationen, die nützlich sein würde lassen Sie mich wissen, danke:
java.lang.RuntimeException: Unable to start activity ComponentInfo{ros_dhhiggins.example.com.periodictable/ros_dhhiggins.example.com.periodictable.PeriodicTableScreen}: java.lang.IllegalStateException: The specified child already has a parent. You must call removeView() on the child's parent first.
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2325)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2387)
at android.app.ActivityThread.access$800(ActivityThread.java:151)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1303)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5254)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698)
Caused by: java.lang.IllegalStateException: The specified child already has a parent. You must call removeView() on the child's parent first.
at android.view.ViewGroup.addViewInner(ViewGroup.java:3936)
at android.view.ViewGroup.addView(ViewGroup.java:3786)
at android.view.ViewGroup.addView(ViewGroup.java:3727)
at android.view.ViewGroup.addView(ViewGroup.java:3700)
at ros_dhhiggins.example.com.periodictable.PeriodicTableScreen.tableGen(PeriodicTableScreen.java:46)
at ros_dhhiggins.example.com.periodictable.PeriodicTableScreen.onCreate(PeriodicTableScreen.java:18)
at android.app.Activity.performCreate(Activity.java:5990)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1106)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2278)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2387)
at android.app.ActivityThread.access$800(ActivityThread.java:151)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1303)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5254)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698)
Dies ist der Code für die Aktivität dieser in geschieht!
Ihr Code ist eine Art Durcheinander, aber überprüfen Sie Ihre Logik auf die Schleifenzähler und Array-Indizes in den inneren 'for' Schleifen in' tableGen() '. Die erste Zeile fügt 'Button's 0-17 hinzu, dann versucht die zweite Zeile, die' 'Button's von 17 wieder hinzuzufügen -' tempRow.addView (imageButtons [temp-1]); '. –
Danke! Das habe ich leider vermisst, hätte vorsichtiger sein müssen. Ich hatte etwas ausprobiert, weshalb der Code so unordentlich war und das übersehen hatte. Funktioniert jetzt. – Dan
Sie sollten keine Schleife haben, wenn Sie für jeden Fall eine völlig andere Logik haben; es vereitelt den Zweck einer Schleife. Und wenn 'createButtons' ein Typ sein soll, sollte es als' CreateButtons' geschrieben werden. –