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Quand j'appelle:NullPointerException getText()/Popup/EditText Android
channel_name = textinput.getText().toString();
je reçois un NullPointerException. Je pense que mon problème est dans cette ligne de code:
final EditText textinput = (EditText)findViewById(R.id.popup_plaintext);
Mais je ne peux pas trouver l'erreur. J'ai aussi utilisé la recherche, mais je ne comprends toujours pas. J'espère que quelqu'un peut m'aider ici.
Ici u peut regarder mon code complet:
package de.project.ibob;
import android.app.Activity;
import android.content.Context;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.util.Log;
import android.view.Gravity;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.View.OnLongClickListener;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.EditText;
import android.widget.PopupWindow;
import android.widget.RadioButton;
import android.widget.RadioGroup;
import android.widget.RadioGroup.OnCheckedChangeListener;
import android.widget.Switch;
public class ModuleActivity extends Activity{
//Data
int a = 16;
int b = 6;
byte[][] buffer = new byte[a][b];
public int LongClickID;
public String channel_name;
//Debugging
private static final String TAG = "ModuleActivity";
private static final boolean D = true;
//Layout
private PopupWindow pwindo;
private RadioGroup mradiogroup;
private RadioButton mradiobutton[] = new RadioButton[7];
private Switch mswitch[] = new Switch[33];
private Button buttonClosePopup;
public Switch textoutput;
private void SavePreferences() {
SharedPreferences settings = getSharedPreferences("Channels", 0);
SharedPreferences.Editor editor = settings.edit();
//Buttons
for(int i = 1; i < 7; i++) {
editor.putBoolean("radio" + i, mradiobutton[i].isChecked());
}//for
for(int i = 1; i < 33; i++) {
editor.putBoolean("switch" + i, mswitch[i].isChecked());
}//for
editor.commit();
}//SafePreferences
private void LoadPreferences() {
SharedPreferences settings = getSharedPreferences("Channels", 0);
//
//Buttons
for(int i = 1; i < 7; i++) {
mradiobutton[i].setChecked(settings.getBoolean("radio" + i, false));
}//for
for(int i = 1; i < 33; i++) {
mswitch[i].setChecked(settings.getBoolean("switch" + i, false));
}//for
}//LoadPreferences
@Override
public void onCreate(Bundle savedInstanceState) {
if(D) Log.e(TAG, "+++ ON CREATE +++");
super.onCreate(savedInstanceState);
//Layout
setContentView(R.layout.modules);
//RadioGroup
mradiogroup = (RadioGroup)findViewById(R.id.radio_group_modules);
//RadioButtons (i = 1 because of radiobutton_modules_module ID starts at 1! ==> i <7 NOT 6!)
for(int i = 1; i < 7; i++) {
String RadioID = "radiobutton_modules_module" + i;
int resID = getResources().getIdentifier(RadioID, "id", "de.project.ibob");
mradiobutton[i] = ((RadioButton)findViewById(resID));
if(D) Log.e(TAG, "+++ SetRadioButton +++" + i);
}//for
//Switches (i = 1 because of Switch ID starts at 1! ==> i <33 NOT 32!)
for(int i = 1; i < 33; i++) {
String SwitchID = "Switch" + i;
int resID = getResources().getIdentifier(SwitchID, "id", "de.project.ibob");
mswitch[i] = ((Switch)findViewById(resID));
mswitch[i].setOnLongClickListener(new OnLongClickListener(){
@Override
public boolean onLongClick(View v) {
if(D) Log.e(TAG, "+++ LongClick +++" + v.getId());
LongClickID = v.getId();
initiatePopupWindow();
return true;
}
});
if(D) Log.e(TAG, "+++ Switch +++" + i);
}//for
//Buttons Listener
mradiogroup.setOnCheckedChangeListener(new OnCheckedChangeListener() {
@Override
public void onCheckedChanged(RadioGroup group, int mradiogroup) {
for(int i = 1; i < 7; i++) {
if(mradiobutton[i].isChecked() == true) {
if(D) Log.e(TAG, "+++ RadioButton selected +++");
//Identifier (MODUL - Read/Write - Channel) all 16 Messages get the same ModulID
for(a = 0; a < 15; a++) {
if(i == 1)buffer[a][0] = 0x01;
if(i == 2)buffer[a][1] = 0x02;
if(i == 3)buffer[a][2] = 0x03;
if(i == 4)buffer[a][3] = 0x04;
if(i == 5)buffer[a][4] = 0x05;
if(i == 6)buffer[a][5] = 0x06;
}//for
if(D) Log.e(TAG, "ID Byte:" + i + " selected");
}//if
}//for
}//onCheckedChanged
});//setOnCheckedChangedListener
//Functions
LoadPreferences();
}//onCreate
@Override
public void onBackPressed() {
SavePreferences();
super.onBackPressed();
if(D) Log.e(TAG, "+++ onBackPressed +++");
}//onBackPressed
public void initiatePopupWindow() {
try{
LayoutInflater inflater = (LayoutInflater)
ModuleActivity.this.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View layout = inflater.inflate(R.layout.popup,
(ViewGroup)findViewById(R.id.popup_element));
pwindo = new PopupWindow(layout,600,250,true);
pwindo.showAtLocation(layout, Gravity.CENTER,0,0);
buttonClosePopup = (Button)layout.findViewById(R.id.button_modules_popup_setText);
buttonClosePopup.setOnClickListener(cancel_button_click_listener);
}//try
catch(Exception e) {
e.printStackTrace();
}
}
public OnClickListener cancel_button_click_listener = new OnClickListener(){
@Override
public void onClick(View cancel_button_click_listener){
final EditText textinput = (EditText)findViewById(R.id.popup_plaintext);
channel_name = textinput.getText().toString();
textoutput = (Switch)findViewById(LongClickID);
textoutput.setText(channel_name);
pwindo.dismiss();
}
};
}
stacktrace:
01-26 00:13:58.071: E/AndroidRuntime(15877): FATAL EXCEPTION: main
01-26 00:13:58.071: E/AndroidRuntime(15877): java.lang.NullPointerException
01-26 00:13:58.071: E/AndroidRuntime(15877): at de.project.ibob.ModuleActivity$1.onClick(ModuleActivity.java:205)
01-26 00:13:58.071: E/AndroidRuntime(15877): at android.view.View.performClick(View.java:4232)
01-26 00:13:58.071: E/AndroidRuntime(15877): at android.view.View$PerformClick.run(View.java:17318)
01-26 00:13:58.071: E/AndroidRuntime(15877): at android.os.Handler.handleCallback(Handler.java:615)
01-26 00:13:58.071: E/AndroidRuntime(15877): at android.os.Handler.dispatchMessage(Handler.java:92)
01-26 00:13:58.071: E/AndroidRuntime(15877): at android.os.Looper.loop(Looper.java:137)
01-26 00:13:58.071: E/AndroidRuntime(15877): at android.app.ActivityThread.main(ActivityThread.java:4921)
01-26 00:13:58.071: E/AndroidRuntime(15877): at java.lang.reflect.Method.invokeNative(Native Method)
01-26 00:13:58.071: E/AndroidRuntime(15877): at java.lang.reflect.Method.invoke(Method.java:511)
01-26 00:13:58.071: E/AndroidRuntime(15877): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1038)
01-26 00:13:58.071: E/AndroidRuntime(15877): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:805)
01-26 00:13:58.071: E/AndroidRuntime(15877): at dalvik.system.NativeStart.main(Native Method)
Et vous pouvez voir ma mise en page code xml:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/popup_element"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="#444444" >
<TextView
android:id="@+id/popup_text"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:layout_marginTop="32dp"
android:text="@string/set_name"
android:textAppearance="?android:attr/textAppearanceLarge"
android:textColor="@android:color/white" />
<Button
android:id="@+id/button_modules_popup_setText"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@+id/popup_plaintext"
android:layout_centerHorizontal="true"
android:layout_marginTop="21dp"
android:text="@string/set_channelname"
android:textColor="@android:color/white" />
<EditText
android:id="@+id/popup_plaintext"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@+id/popup_text"
android:layout_centerHorizontal="true"
android:layout_marginTop="21dp"
android:ems="10"
android:inputType="text"
android:textColor="@android:color/white" />
</RelativeLayout>
Merci
Est-ce que le textinput est initialisé avec n'importe quel contenu, quand vous le regardez dans le débogueur? – Simon
Non, il dit textinput = null, donc il n'y a pas de contenu. Mais j'écris un texte dans le PlainText. Alors, où pourrait être mon erreur? –
Voilà la raison de la NPE. Comme je ne suis pas au courant de l'API Android, je ne peux que deviner, mais soit findViewById renvoie null pour une raison quelconque ou le casting à EditText ne fonctionne pas. Vérifiez également s'il y a des avertissements du compilateur qui pourraient être suspects. – Simon