FAQ AndroidConsultez toutes les FAQ

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public class MaClass extends Activity implements Runnable { 
  
	private ProgressDialog pd; 
  
	//... 
  
	public void launchWait() { 
		pd = ProgressDialog.show(this, "Patientez...", "En cours d'action longue", true,false); 
  
		Thread thread = new Thread(this); 
		thread.start(); 
	} 
  
	public void run() { 
  
		//Ici mettre le code qui effectue une opération "longue"  
		//... 
		//... 
  
		//Une fois l'opération finie, prévenir la boîte de dialogue  
		//qu'elle peut se fermer : 
		handler.sendEmptyMessage(0); 
	} 
  
	private Handler handler = new Handler() { 
  
		@Override 
		public void handleMessage(Message msg) { 
			//Le handler a reçu une notification 
			//On ferme la boîte de dialogue 
			//Les bonnes pratiques voudraient qu'on teste le msg ... 
			pd.dismiss(); 
		} 
	}; 
}

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InputMethodManager imm = (InputMethodManager)getSystemService(Context.INPUT_METHOD_SERVICE); 
imm.hideSoftInputFromWindow(myEditText.getWindowToken(), 0);

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<Button 
	android:layout_width="wrap_content" 
	android:layout_height="wrap_content" 
	android:drawableLeft="@drawable/icon" 
	android:text="Exemple image à gauche" 
	android:minWidth="180dp" />

<activity android:theme="@android:style/Theme.NoTitleBar" ... />

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/** Called when the activity is first created. */ 
@Override 
public void onCreate(Bundle savedInstanceState) { 
	super.onCreate(savedInstanceState); 
        //Renseigner ce code avant l'appel à 'setContentView' 
	this.requestWindowFeature(Window.FEATURE_NO_TITLE); 
	setContentView(R.layout.main); 
        //... 
}

<application android:theme="@android:style/Theme.NoTitleBar" ... />

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private Toast toast; 
  
private void showToast(String message){ 
  
	if(toast!=null){ 
		toast.setText(message); 
	}else{ 
		toast = Toast.makeText(this, message,Toast.LENGTH_SHORT); 
	} 
	toast.show(); 
} 
  
public void maMethode() { 
	//On affiche un premier Toast 
	showToast("message1"); 
	//...  
	//On affiche ou modifie le Toast 
	showToast("message2"); 
}

android:screenOrientation="portrait" android:configChanges="orientation"

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<selector xmlns:android="http://schemas.android.com/apk/res/android"> 
	<item android:state_focused="true" android:color="@color/testcolor1"/> 
	<item android:state_pressed="true" android:state_enabled="false" android:color="@color/testcolor2" /> 
	<item android:state_enabled="false" android:color="@color/testcolor3" /> 
	<item android:color="@color/testcolor5"/> 
</selector>

android:background="@drawable/selector_bouton"

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<?xml version="1.0" encoding="utf-8"?> 
<manifest xmlns:android="http://schemas.android.com/apk/res/android" 
	package="com.example.yabolank.apptransparent" > 
	<application 
		android:allowBackup="true" 
		android:icon="@mipmap/ic_launcher" 
		android:label="AppTransparent" 
		android:theme="@android:style/Theme.Holo.Wallpaper" > 
		<activity 
			android:name=".EcranPrincipal" 
			android:label="Accueil" > 
			<intent-filter> 
				<action android:name="android.intent.action.MAIN"/> 
				<category android:name="android.intent.category.LAUNCHER"/> 
			</intent-filter> 
		</activity> 
	</application> 
</manifest>

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<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:background="#886f18c1" 
	tools:context=".EcranPrincipal"> 
  
	<Button 
		android:layout_width="wrap_content" 
		android:layout_height="wrap_content" 
		android:layout_centerInParent="true" 
		android:text="Salut ! Suis un Button" /> 
</RelativeLayout>

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package com.example.yabolank.apptransparent; 
  
import android.os.Bundle; 
import android.app.Activity; 
  
public class EcranPrincipal extends Activity { 
  
	@Override 
	protected void onCreateBundle savedInstanceState) { 
		super.onCreate(savedInstanceState); 
		setContentView(R.layout.activity_ecran_principal); 
	} 
}