android之Spinner控件用法
用法1：
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:id="@+id/container" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent" tools:context="com.example.mars_2100_spinner.MainActivity" tools:ignore="MergeRootFrame" > <Spinner android:layout_width="fill_parent" android:layout_height="wrap_content" android:id="@+id/SpinnerId"/> </LinearLayout>
package com.example.mars_2100_spinner; import android.support.v7.app.ActionBarActivity; import android.support.v7.app.ActionBar; import android.support.v4.app.Fragment; import android.os.Bundle; import android.view.LayoutInflater; import android.view.Menu; import android.view.MenuItem; import android.view.View; import android.view.ViewGroup; import android.widget.AdapterView; import android.widget.ArrayAdapter; import android.widget.Spinner; import android.widget.Toast; import android.os.Build; public class MainActivity extends ActionBarActivity { private static final String[] m_arr = {"第一组","第二组","第三组"}; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); Spinner _spin = (Spinner)findViewById(R.id.SpinnerId); ArrayAdapter<String> ada = new ArrayAdapter<String>(this, android.R.layout.simple_spinner_item, m_arr); ada.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item); _spin.setAdapter(ada); _spin.setOnItemSelectedListener(new Spinner.OnItemSelectedListener(){ public void onItemSelected(AdapterView<?> arg0, View arg1, int arg2, long arg3){ dispToast("选择的是"+m_arr[arg2]); arg0.setVisibility(View.VISIBLE); } public void onNothingSelected(AdapterView<?> arg0){ // } }); /*if (savedInstanceState == null) { getSupportFragmentManager().beginTransaction() .add(R.id.container, new PlaceholderFragment()).commit(); }*/ } public void dispToast(String str){ Toast.makeText(this, str, Toast.LENGTH_SHORT).show(); } @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; } @Override public boolean onOptionsItemSelected(MenuItem item) { // Handle action bar item clicks here. The action bar will // automatically handle clicks on the Home/Up button, so long // as you specify a parent activity in AndroidManifest.xml. int id = item.getItemId(); if (id == R.id.action_settings) { return true; } return super.onOptionsItemSelected(item); } /** * A placeholder fragment containing a simple view. */ public static class PlaceholderFragment extends Fragment { public PlaceholderFragment() { } @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { View rootView = inflater.inflate(R.layout.fragment_main, container, false); return rootView; } } }
用法2：
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:id="@+id/container" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent" tools:context="com.example.mars_2100_spinner.MainActivity" tools:ignore="MergeRootFrame" > <Spinner android:layout_width="fill_parent" android:layout_height="wrap_content" android:id="@+id/SpinnerId2"/> <TextView android:id="@+id/textView1" android:layout_width="fill_parent" android:layout_height="wrap_content"/> <Spinner android:layout_width="fill_parent" android:layout_height="wrap_content" android:id="@+id/SpinnerId3"/> <TextView android:id="@+id/textView2" android:layout_width="fill_parent" android:layout_height="wrap_content"/> </LinearLayout>
package com.example.mars_2100_spinner; import android.support.v7.app.ActionBarActivity; import android.support.v7.app.ActionBar; import android.support.v4.app.Fragment; import android.app.Activity; import android.os.Bundle; import android.view.LayoutInflater; import android.view.Menu; import android.view.MenuItem; import android.view.View; import android.view.ViewGroup; import android.widget.AdapterView; import android.widget.AdapterView.OnItemSelectedListener; import android.widget.ArrayAdapter; import android.widget.Spinner; import android.widget.TextView; import android.os.Build; public class Main02Activity extends Activity { static final String[] CONSTELLATIONS = new String[] { "白羊座", "金牛座", "双子座", "巨蟹座", "狮子座", "处女座", "天枰座", "天蝎座", "射手座", "魔蝎座", "水瓶座", "双鱼座" }; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main02); final TextView txt2 = (TextView) findViewById(R.id.textView1); Spinner s1 = (Spinner) findViewById(R.id.SpinnerId2); final ArrayAdapter<CharSequence> adapter = ArrayAdapter .createFromResource(this, R.array.planets_array, android.R.layout.simple_spinner_item); adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item); s1.setAdapter(adapter); s1.setPrompt("测试"); s1.setOnItemSelectedListener(new OnItemSelectedListener() { @Override public void onItemSelected(AdapterView<?> parent, View view, int position, long id) { txt2.setText(adapter.getItem(position).toString()); } @Override public void onNothingSelected(AdapterView<?> parent) { txt2.setText("没选中的"); } }); final TextView txt4 = (TextView) findViewById(R.id.textView2); Spinner s2 = (Spinner) findViewById(R.id.SpinnerId3); ArrayAdapter<CharSequence> adapterC = new ArrayAdapter<CharSequence>( this, android.R.layout.simple_spinner_item, CONSTELLATIONS); adapterC.setDropDownViewResource(android.R.layout.simple_spinner_item); s2.setAdapter(adapterC); s2.setOnItemSelectedListener(new OnItemSelectedListener() { public void onItemSelected(AdapterView<?> parent, View view, int position, long id) { txt4.setText(CONSTELLATIONS[position]); } public void onNothingSelected(AdapterView<?> parent) { txt4.setText("没选中的"); } }); } @Override public boolean onCreateOptionsMenu(Menu menu) { // Inflate the menu; this adds items to the action bar if it is present. getMenuInflater().inflate(R.menu.main02, menu); return true; } @Override public boolean onOptionsItemSelected(MenuItem item) { // Handle action bar item clicks here. The action bar will // automatically handle clicks on the Home/Up button, so long // as you specify a parent activity in AndroidManifest.xml. int id = item.getItemId(); if (id == R.id.action_settings) { return true; } return super.onOptionsItemSelected(item); } /** * A placeholder fragment containing a simple view. */ public static class PlaceholderFragment extends Fragment { public PlaceholderFragment() { } @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { View rootView = inflater.inflate(R.layout.fragment_main02, container, false); return rootView; } } }
<?xml version="1.0" encoding="utf-8"?> <resources> <string name="app_name">Mars_2100_Spinner</string> <string name="hello_world">Hello world!</string> <string name="action_settings">Settings</string> <string-array name="planets_array"> <item>Mercury</item> <item>Venus</item> <item>Earth</item> <item>Mars</item> <item>Jupiter</item> <item>Saturn</item> <item>Uranus</item> <item>Neptune</item> </string-array> <string name="title_activity_main02">Main02Activity</string> </resources>
