pdm_aula07_Spinner

Prévia do material em texto

PDM - Aula07- Ver 01 - 18/10/2012 08:57
Programação de Dispositivos Móveis
Aula 07
Interface Gráfica – Spinner (ComboBox)
Continuação da Aplicação Android (Aula07B)
O aplicativo que agora vai permitir o usuário verificar a funcionalidade do Spinner (combobox).
Código – Aula07B Spinner
Listagem 1. exemplo_spinner.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
	android:layout_width="fill_parent" android:layout_height="wrap_content"
	android:orientation="vertical" >
	
	<TextView
		android:layout_width="fill_parent" android:layout_height="wrap_content"
		android:text="Selecione uma opção" />
	
	<Spinner android:id="@+id/spinnerPlanetas"
		android:layout_width="fill_parent" android:layout_height="wrap_content"
		android:drawSelectorOnTop="true"
		android:prompt="@string/texto_combo" />
	
	<ImageView android:id="@+id/img"
		android:layout_width="fill_parent" android:layout_height="fill_parent" 	/>
	
	<Button android:id="@+id/buttonExibir"
		android:layout_width="wrap_content" android:layout_height="wrap_content" 
		android:layout_gravity="center" android:text="Exibir Valor" />
	
</LinearLayout>
Listagem 2. ExemploSpinner.java
package com.pdm.aula07bex1;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemSelectedListener;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.Spinner;
import android.widget.Toast;
public class ExemploSpinner extends Activity implements OnClickListener{
	
	Button bExibir;
	Spinner sPlaneta=null;
	private String[] planetas = new String[] { "Mercúrio", "Venus", "Terra", "Marte", "Júptier", "Saturno", "Urano",
			"Netuno", "Plutão" };
	
	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.exemplo_spinner);
		sPlaneta = (Spinner) findViewById(R.id.spinnerPlanetas);
		ArrayAdapter adaptador = new ArrayAdapter<String>(this, android.R.layout.simple_spinner_item, planetas);
		adaptador.setDropDownViewResource(android.R.layout.simple_spinner_item);
		sPlaneta.setAdapter(adaptador);
		
		bExibir = (Button) this.findViewById(R.id.buttonExibir);
		bExibir.setOnClickListener(this); 	 
	}	
	
	public void onClick(View v){
		if (v.getId() == bExibir.getId()){
			String item = (String) sPlaneta.getSelectedItem();
			Toast.makeText(this, "Valor do Item: " + item, Toast.LENGTH_SHORT).show();
		}	
	}	
}
Listagem 3. Aula07BActivity.java
package com.pdm.aula07bex1;
import com.pdm.aula07bex1.R;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
public class Aula7BActivity extends Activity implements OnClickListener{
 /** Called when the activity is first created. */
	Button b1,b2,b3,b4,b5,b6,b7;
	
	@Override
 public void onCreate(Bundle savedInstanceState) {
 super.onCreate(savedInstanceState);
 setContentView(R.layout.main);
 b1 = (Button) this.findViewById(R.id.buttonImageImageButton);
 b1.setOnClickListener(this);
 b2 = (Button) this.findViewById(R.id.buttonAlertDialog);
 b2.setOnClickListener(this);
 b3 = (Button) this.findViewById(R.id.buttonToast);
 b3.setOnClickListener(this); 
 b4 = (Button) this.findViewById(R.id.buttonListView);
 b4.setOnClickListener(this); 
 b5 = (Button) this.findViewById(R.id.buttonAutoComplete);
 b5.setOnClickListener(this); 
 b6 = (Button) this.findViewById(R.id.buttonSpinner);
 b6.setOnClickListener(this); 
 b7 = (Button) this.findViewById(R.id.buttonProgressDialog);
 b7.setOnClickListener(this); 
 }
	
	public void onClick(View v){
		
		if (v.getId() == b1.getId()){
			startActivity(new Intent(this, ExemploImageImageButton.class));
		}
		if (v.getId() == b5.getId()){
			startActivity(new Intent(this, ExemploAutoCompleteTextView.class));
		}	
		if (v.getId() == b6.getId()){
			startActivity(new Intent(this, ExemploSpinner.class));
		}	
	}
}
	
Listagem 4. AndroidManifest.xml
	
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
 package="com.pdm.veiculo"
 android:versionCode="1"
 android:versionName="1.0">
 <uses-sdk android:minSdkVersion="8" />
 <application
 android:icon="@drawable/ic_launcher"
 android:label="@string/app_name" >
 <activity
 android:name=".Aula7BActivity"
 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=".ExemploAutoCompleteTextView"></activity>
 <activity android:name=".ExemploImageImageButton"></activity>
 <activity android:name=".ExemploSpinner"></activity>
	<!-- Atenção - ACRESCENTAR A MEDIDA QUE FOR CODIFICANDO CADA VIEW --> 
 <activity android:name=".ExemploToast"></activity>
 <activity android:name=".ExemploListView"></activity>
 <activity android:name=".ExemploAlertDialog"></activity>
 <activity android:name=".ExemploProgressDialog"></activity>
 </application>
</manifest>
	
	
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