当我单击 ID 为“faouzi”的按钮时，它不起作用！有人能帮我吗？我的目标是显示一个名为 ChangePassword 的活动，但它不会启动此活动并且什么也不做。
public class MainActivity extends Activity {
SharedPreferences Pref;
SharedPreferences prefs;
SharedPreferences preferences;
SharedPreferences.Editor editor;
@Override
protected void onCreate(Bundle savedInstanceState)
{
Pref = getSharedPreferences("myPassword",0);
String password = Pref.getString("passwordRetrieve", "8888");
super.onCreate(savedInstanceState);
//Supprimer la barre de titre de l'activité
requestWindowFeature(Window.FEATURE_NO_TITLE);
setContentView(R.layout.activity_main);
//Je change la couleur de fond du bouton en bleu
Button button = (Button)findViewById(R.id.connection);
//button.getBackground().setColorFilter(Color.BLUE, PorterDuff.Mode.MULTIPLY);
button.setText(password);
//rendre le bouton "Connection" fonctionnel
button.setOnClickListener(new View.OnClickListener() {
public void onClick(View v)
{
EditText text = (EditText)findViewById(R.id.passwordedit);
String str = text.getText().toString();
if(str.equals("1234"))
{
//on va vérifier si l'application a déjà été lancée, si c'est le cas on saute certaines étapes d'initialisat°
preferences = MainActivity.this.getSharedPreferences("nbRepet", MODE_PRIVATE);
int value = preferences.getInt("nbRepet", 0);
if(value<1)
{
sendConnection(v);
}
else
{
Intent intent = new Intent(MainActivity.this, RegulationTime.class);
startActivity(intent);
}
}
else
{
AlertDialog alertdialog = new AlertDialog.Builder(MainActivity.this).create();
alertdialog.setTitle("Wrong Password");
alertdialog.setIcon(R.drawable.wrongpassword);
alertdialog.setMessage("The password you entered is incorrect, please try again!");
alertdialog.show();
}
}
});
//Lorsqu'on clique sur le bouton Change Password
Button changepassword = (Button)findViewById(R.id.faouzi);
changepassword.setOnClickListener(new View.OnClickListener()
{
@Override
public void onClick(View v)
{
Intent intent = new Intent(MainActivity.this, ChangePassword.class);
startActivity(intent);
}
});
}
//Fonction appelée pour lancer l'activité "AddMasterNumber"
public void sendConnection(View v)
{
Intent intent = new Intent(this, AddRecipientNumber.class);
startActivity(intent);
//La nouvelle valeur de "nbRepet" devient 1 & nous empêche de relancer la série d'activités une 2nde fois
//L'utilisateur ne doit procéder à certaines étapes 1seule fois (ex: entrer le n° de la socket); on évite cela!
prefs = getSharedPreferences("nbRepet",Context.MODE_PRIVATE);
editor = prefs.edit();
editor.putInt("nbRepet", 1);
editor.commit();
}
}
以及用于布局的以下 XML 文件：
<RelativeLayout 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"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context=".MainActivity" >
<TextView
android:id="@+id/text1"
android:layout_marginTop="20dp"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="20sp"
android:layout_alignLeft="@+id/passwordedit"
android:text="@string/connection" />
<TextView
android:id="@+id/text2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/passwordedit"
android:layout_below="@+id/text1"
android:text="@string/password"
android:layout_marginTop="30dp" />
<EditText
android:layout_height="wrap_content"
android:layout_width="250dp"
android:layout_centerHorizontal="true"
android:layout_below="@+id/text2"
android:id="@+id/passwordedit"
android:inputType="numberPassword" />
<Button
android:id="@+id/connection"
android:layout_height="wrap_content"
android:layout_width="250dp"
android:layout_below="@+id/passwordedit"
android:layout_marginTop="10dp"
android:layout_centerHorizontal="true"
android:onClick="sendConnection"
android:text="@string/connection" />
<TextView
android:id="@+id/defaultpassword"
android:layout_alignLeft="@+id/passwordedit"
android:layout_width="fill_parent"
android:layout_marginTop="30dp"
android:layout_height="wrap_content"
android:text="@string/defaultpassword"
android:layout_below="@+id/connection" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:text="@string/change"
android:layout_below="@+id/defaultpassword"
android:id="@+id/change" />
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:onClick="onClick"
android:layout_below="@+id/change"
android:id="@+id/faouzi"
/>
</RelativeLayout>
这里是 AndroidManifest 文件：
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.automatik"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="7"
android:targetSdkVersion="17" />
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name="com.example.automatik.MainActivity"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name="com.example.automatik.AddMasterNumber"
android:label="@string/title_activity_add_master_number"
android:parentActivityName="com.example.automatik.MainActivity" >
<meta-data
android:name="android.support.PARENT_ACTIVITY"
android:value="com.example.automatik.MainActivity" />
</activity>
<activity
android:name="com.example.automatik.AddRecipientNumber"
android:label="@string/title_activity_add_recipient_number"
android:parentActivityName="com.example.automatik.MainActivity" >
<meta-data
android:name="android.support.PARENT_ACTIVITY"
android:value="com.example.automatik.MainActivity" />
</activity>
<activity
android:name="com.example.automatik.RegulationTime"
android:label="@string/title_activity_regulation_time"
android:parentActivityName="com.example.automatik.MainActivity" >
<meta-data
android:name="android.support.PARENT_ACTIVITY"
android:value="com.example.automatik.MainActivity" />
</activity>
<activity
android:name="com.example.automatik.ChangePassword"
android:label="@string/title_activity_change_password"
android:parentActivityName="com.example.automatik.MainActivity" >
<meta-data
android:name="android.support.PARENT_ACTIVITY"
android:value="com.example.automatik.MainActivity" />
</activity>
</application>
</manifest>