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J'ai fait un programme de calculatrice fonctionnant parfaitement pour la pratique pour Android. Je n'ai pas aimé la disposition relative que j'ai commencé et j'ai décidé d'essayer la disposition de la grille. Maintenant, mon MainActivity.java ne voit pas le fichier activity_main.xml. J'ai vérifié le fichier R.java et voir une liste pour activity_main.xml, avec tous les boutons énumérés. Le activity_main.xml analyse très bien. J'ai essayé de reconstruire le programme en vain. Toutes les idées seraient utiles! Voici le activity_main.xml fileMainActivity.java ne reconnaît pas activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<android.support.v4.widget.GridLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:alignmentMode="alignBounds"
android:columnCount="8"
android:columnOrderPreserved="false"
android:useDefaultMargins="true" >
<EditText
android:id="@+id/total"
android:layout_column="0"
android:layout_columnSpan="6"
android:layout_gravity="left"
android:layout_row="0"
android:clickable="false"
android:ems="10"
android:inputType="none|number"
android:textAlignment="textEnd"
android:width="500dp" >
<requestFocus />
</EditText>
<Button
android:id="@+id/Button8"
android:layout_column="1"
android:layout_row="1"
android:background="@drawable/button_light_grey"
android:minHeight="40dip"
android:minWidth="40dip"
android:onClick="numberButtonEventHandler"
android:text="8" />
<Button
android:id="@+id/Button9"
android:layout_column="2"
android:layout_row="1"
android:background="@drawable/button_light_grey"
android:minHeight="40dip"
android:minWidth="40dip"
android:onClick="numberButtonEventHandler"
android:text="9" />
<Button
android:id="@+id/Button4"
android:layout_column="0"
android:layout_row="2"
android:background="@drawable/button_light_grey"
android:minHeight="40dip"
android:minWidth="40dip"
android:onClick="numberButtonEventHandler"
android:text="4" />
<Button
android:id="@+id/Button5"
android:layout_column="1"
android:layout_row="2"
android:background="@drawable/button_light_grey"
android:minHeight="40dip"
android:minWidth="40dip"
android:onClick="numberButtonEventHandler"
android:text="5" />
<Button
android:id="@+id/Button6"
android:layout_column="2"
android:layout_row="2"
android:background="@drawable/button_light_grey"
android:minHeight="40dip"
android:minWidth="40dip"
android:onClick="numberButtonEventHandler"
android:text="6" />
<Button
android:id="@+id/ButtonMultiply"
android:layout_column="3"
android:layout_row="2"
android:background="@drawable/custom_button"
android:minHeight="40dip"
android:minWidth="40dip"
android:onClick="Multiply"
android:text="*"
android:textColor="@color/light_grey" />
<Button
android:id="@+id/Button1"
android:layout_column="0"
android:layout_row="3"
android:background="@drawable/button_light_grey"
android:minHeight="40dip"
android:minWidth="40dip"
android:onClick="numberButtonEventHandler"
android:text="1" />
<Button
android:id="@+id/Button2"
android:layout_column="1"
android:layout_row="3"
android:background="@drawable/button_light_grey"
android:minHeight="40dip"
android:minWidth="40dip"
android:onClick="numberButtonEventHandler"
android:text="2" />
<Button
android:id="@+id/Button3"
android:layout_column="2"
android:layout_row="3"
android:background="@drawable/button_light_grey"
android:minHeight="40dip"
android:minWidth="40dip"
android:onClick="numberButtonEventHandler"
android:text="3" />
<Button
android:id="@+id/ButtonMinus"
android:layout_column="3"
android:layout_row="3"
android:background="@drawable/custom_button"
android:minHeight="40dip"
android:minWidth="40dip"
android:onClick="Subtract"
android:text="-"
android:textColor="@color/light_grey" />
<Button
android:id="@+id/ButtonDivide"
android:layout_column="3"
android:layout_gravity="right"
android:layout_row="1"
android:layout_rowSpan="2"
android:background="@drawable/custom_button"
android:minHeight="40dip"
android:minWidth="40dip"
android:onClick="Divide"
android:text="/"
android:textColor="@color/light_grey" />
<Button
android:id="@+id/button0"
android:layout_column="0"
android:layout_columnSpan="2"
android:layout_row="4"
android:background="@drawable/button_light_grey"
android:minHeight="20dp"
android:minWidth="82dp"
android:onClick="numberButtonEventHandler"
android:text="0" />
<Button
android:id="@+id/buttonPoint"
android:layout_column="2"
android:layout_row="4"
android:background="@drawable/button_light_grey"
android:minHeight="20dip"
android:minWidth="40dp"
android:onClick="numberButtonEventHandler"
android:text="."
android:width="20dip" />
<Button
android:id="@+id/ButtonPlus"
android:layout_column="3"
android:layout_row="4"
android:background="@drawable/custom_button"
android:minHeight="40dip"
android:minWidth="40dip"
android:onClick="Add"
android:text="+"
android:textColor="@color/light_grey" />
<Button
android:id="@+id/ButtonEqueals"
android:layout_column="4"
android:layout_row="3"
android:layout_rowSpan="2"
android:background="@drawable/custom_button"
android:height="40dp"
android:minHeight="82dp"
android:minWidth="20dp"
android:onClick="Equeals"
android:text="="
android:textColor="@color/light_grey"
android:width="40dp" />
<Button
android:id="@+id/Button7"
android:layout_column="0"
android:layout_row="1"
android:background="@drawable/button_light_grey"
android:minHeight="40dip"
android:minWidth="40dip"
android:onClick="numberButtonEventHandler"
android:text="7" />
</android.support.v4.widget.GridLayout>
Et voici le fichier MainActivity.java
package com.example.calculator;
import android.R;
import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
public class MainActivity extends Activity{
private String textTotal = "";
Total total = new Total();
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main); <---here I get my first error
eclipse help suggests changing
//setButtonListeners(); to activity_list_item. This
} doesn't help
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
public void numberButtonEventHandler(View v) {
textTotal += ((Button) v).getText();
TextView total = (TextView)findViewById(R.id.total);
total.setText(textTotal);
}
public void Add(View v){
try {
total.doMath(Double.parseDouble(textTotal));
} catch (NumberFormatException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
total.setOperater("+");
TextView TextViewtotal = (TextView)findViewById(R.id.total);
TextViewtotal.setText(Double.toString(total.getTotalValue()));
textTotal = "";
}
public void Subtract(View v){
try {
total.doMath(Double.parseDouble(textTotal));
} catch (NumberFormatException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
total.setOperater("-");
TextView TextViewtotal = (TextView)findViewById(R.id.total);
TextViewtotal.setText(Double.toString(total.getTotalValue()));
textTotal = "";
}
public void Multiply(View v){
try {
total.doMath(Double.parseDouble(textTotal));
} catch (NumberFormatException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
total.setOperater("*");
TextView TextViewtotal = (TextView)findViewById(R.id.total);
TextViewtotal.setText(Double.toString(total.getTotalValue()));
textTotal = "";
}
public void Divide(View v){
try {
total.doMath(Double.parseDouble(textTotal));
} catch (NumberFormatException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
total.setOperater("/");
TextView TextViewtotal = (TextView)findViewById(R.id.total);
TextViewtotal.setText(Double.toString(total.getTotalValue()));
textTotal = "";
}
public void Equeals(View v){
try {
total.doMath(Double.parseDouble(textTotal));
} catch (NumberFormatException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
total.setOperater("");
TextView TextViewtotal = (TextView)findViewById(R.id.total);
TextViewtotal.setText(Double.toString(total.getTotalValue()));
textTotal = "";
}
}
Sortie de la console maintenant:
[2013-04-03 22:19:26 - Calculator] Could not find Calculator.apk!
[2013-04-03 22:19:53 - Calculator] ------------------------------
[2013-04-03 22:19:53 - Calculator] Android Launch!
[2013-04-03 22:19:53 - Calculator] adb is running normally.
[2013-04-03 22:19:53 - Calculator] Could not find Calculator.apk!
[2013-04-03 22:20:58 - Calculator] ------------------------------
[2013-04-03 22:20:58 - Calculator] Android Launch!
[2013-04-03 22:20:58 - Calculator] adb is running normally.
[2013-04-03 22:20:58 - Calculator] Could not find Calculator.apk!
[2013-04-03 22:24:29 - Calculator] ------------------------------
[2013-04-03 22:24:29 - Calculator] Android Launch!
[2013-04-03 22:24:29 - Calculator] adb is running normally.
[2013-04-03 22:24:29 - Calculator] Could not find Calculator.apk!
sortie suivante logcat:
04-03 22:46:16.121: E/AndroidRuntime(17973): FATAL EXCEPTION: main
04-03 22:46:16.121: E/AndroidRuntime(17973): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.calculator/com.example.calculator.MainActivity}: android.view.InflateException: Binary XML file line #2: Error inflating class android.support.v4.widget.GridLayout
04-03 22:46:16.121: E/AndroidRuntime(17973): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2663)
04-03 22:46:16.121: E/AndroidRuntime(17973): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679)
04-03 22:46:16.121: E/AndroidRuntime(17973): at android.app.ActivityThread.access$2300(ActivityThread.java:125)
04-03 22:46:16.121: E/AndroidRuntime(17973): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033)
04-03 22:46:16.121: E/AndroidRuntime(17973): at android.os.Handler.dispatchMessage(Handler.java:99)
04-03 22:46:16.121: E/AndroidRuntime(17973): at android.os.Looper.loop(Looper.java:123)
04-03 22:46:16.121: E/AndroidRuntime(17973): at android.app.ActivityThread.main(ActivityThread.java:4627)
04-03 22:46:16.121: E/AndroidRuntime(17973): at java.lang.reflect.Method.invokeNative(Native Method)
04-03 22:46:16.121: E/AndroidRuntime(17973): at java.lang.reflect.Method.invoke(Method.java:521)
04-03 22:46:16.121: E/AndroidRuntime(17973): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:858)
04-03 22:46:16.121: E/AndroidRuntime(17973): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
04-03 22:46:16.121: E/AndroidRuntime(17973): at dalvik.system.NativeStart.main(Native Method)
04-03 22:46:16.121: E/AndroidRuntime(17973): Caused by: android.view.InflateException: Binary XML file line #2: Error inflating class android.support.v4.widget.GridLayout
04-03 22:46:16.121: E/AndroidRuntime(17973): at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:576)
04-03 22:46:16.121: E/AndroidRuntime(17973): at android.view.LayoutInflater.inflate(LayoutInflater.java:385)
04-03 22:46:16.121: E/AndroidRuntime(17973): at android.view.LayoutInflater.inflate(LayoutInflater.java:320)
04-03 22:46:16.121: E/AndroidRuntime(17973): at android.view.LayoutInflater.inflate(LayoutInflater.java:276)
04-03 22:46:16.121: E/AndroidRuntime(17973): at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:200)
04-03 22:46:16.121: E/AndroidRuntime(17973): at android.app.Activity.setContentView(Activity.java:1647)
04-03 22:46:16.121: E/AndroidRuntime(17973): at com.example.calculator.MainActivity.onCreate(MainActivity.java:17)
04-03 22:46:16.121: E/AndroidRuntime(17973): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1049)
04-03 22:46:16.121: E/AndroidRuntime(17973): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2627)
04-03 22:46:16.121: E/AndroidRuntime(17973): ... 11 more
04-03 22:46:16.121: E/AndroidRuntime(17973): Caused by: java.lang.ClassNotFoundException: android.support.v4.widget.GridLayout in loader dalvik.system.PathClassLoader[/data/app/com.example.calculator-1.apk]
04-03 22:46:16.121: E/AndroidRuntime(17973): at dalvik.system.PathClassLoader.findClass(PathClassLoader.java:243)
04-03 22:46:16.121: E/AndroidRuntime(17973): at java.lang.ClassLoader.loadClass(ClassLoader.java:573)
04-03 22:46:16.121: E/AndroidRuntime(17973): at java.lang.ClassLoader.loadClass(ClassLoader.java:532)
04-03 22:46:16.121: E/AndroidRuntime(17973): at android.view.LayoutInflater.createView(LayoutInflater.java:466)
04-03 22:46:16.121: E/AndroidRuntime(17973): at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:565)
04-03 22:46:16.121: E/AndroidRuntime(17973): ... 19 more
après la suppression de l'importation android.R l'erreur disparaît, mais maintenant la console se plaint qu'il ne peut pas trouver calculator.apk –
Que signifie ne peut pas trouver? Essayez de nettoyer et de construire le projet. – WELLCZECH
Vérifiez le dossier "bin" dans votre projet s'il y a Calculator-debug.apk ou quelque chose comme ce nom. – WELLCZECH