我在我的应用程序中添加了一个Spinner。现在我想在点击时添加一个“最近搜索”按钮，它将显示用户从Spinner做出的先前选择。我搜索了很多网站，包括android开发人员，堆栈溢出等等，但我发现只保存了历史记录用于搜索小部件。我怎样才能做到这一点？这些是我搜索过的链接。我不知道如何将它应用于Spinners。
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这是我的主要活动课
public class MainActivity extends AppCompatActivity implements View.OnClickListener {
TextView bus_selection, bus_selection2;
Button bus_go;
String bus_stationf, bus_stationt;
int bus_posf, bus_post;
TextView selection, selection2;
Button ac_go;
String stationf, stationt;
int posf, post;
DatePicker datePicker,datePicker1;
String stand[] = {"Durg Railway Station", "Durg Bus Station", "power house", "Tatibandh", "Pachdedinaka", "Telibandha", "Raipur Airport"};
String stand1[] = {"Durg Railway Station", "Durg Bus Station", "power house", "Tatibandh", "Pachdedinaka", "Telibandha", "Raipur Airport"};
@TargetApi(11)
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.layout);
datePicker=(DatePicker)findViewById(R.id.datePicker1);
datePicker1=(DatePicker)findViewById(R.id.datePicker2);
datePicker.setSpinnersShown(false);
datePicker1.setSpinnersShown(false);
TabHost th = (TabHost) findViewById(R.id.tabhost);
th.setup();
TabHost.TabSpec spec = th.newTabSpec("tag2");
spec.setContent(R.id.tab1);
spec.setIndicator(" AC bus ");
th.addTab(spec);
spec = th.newTabSpec("tag1");
spec.setContent(R.id.tab2);
spec.setIndicator("City bus ");
th.addTab(spec);
bus_selection = (TextView) findViewById(R.id.tv1);
Spinner bus_spin = (Spinner) findViewById(R.id.spinner1);
ArrayAdapter<String> cc = new ArrayAdapter<String>(this, R.layout.row,R.id.station,stand);
bus_spin.setAdapter(cc);
bus_spin.setOnItemSelectedListener(new busFromSpinner());
bus_selection2 = (TextView) findViewById(R.id.tv2);
Spinner bus_spin2 = (Spinner) findViewById(R.id.spinner2);
ArrayAdapter<String> dd = new ArrayAdapter<String>(this, R.layout.row,R.id.station,stand1);
bus_spin2.setAdapter(dd);
bus_spin2.setOnItemSelectedListener(new busToSpinner());
bus_go = (Button) findViewById(R.id.b1);
bus_go.setOnClickListener(this);
selection = (TextView) findViewById(R.id.tv3);
Spinner spin = (Spinner) findViewById(R.id.spinner3);
ArrayAdapter<String> aa = new ArrayAdapter<String>(this, R.layout.row,R.id.station,stand);
spin.setAdapter(aa);
spin.setOnItemSelectedListener(new ac_busFromSpinner());
selection2 = (TextView) findViewById(R.id.tv4);
Spinner spin2 = (Spinner) findViewById(R.id.spinner4);
ArrayAdapter<String> bb = new ArrayAdapter<String>(this, R.layout.row,R.id.station,stand1);
spin2.setAdapter(bb);
spin2.setOnItemSelectedListener(new ac_busToSpinner());
ac_go = (Button) findViewById(R.id.b2);
ac_go.setOnClickListener(this);
}
class busFromSpinner implements AdapterView.OnItemSelectedListener {
public void onItemSelected(AdapterView<?> parent, View v, int position, long id) {
Toast.makeText(v.getContext(), "You choose :" + stand[position], Toast.LENGTH_SHORT).show();
bus_stationf = stand[position];
bus_posf = position;
}
public void onNothingSelected(AdapterView<?> arg0) {
// TODO Auto-generated method stub
}
}
class busToSpinner implements AdapterView.OnItemSelectedListener {
public void onItemSelected(AdapterView<?> parent, View v, int position, long id) {
Toast.makeText(v.getContext(), "You choose :" + stand1[position], Toast.LENGTH_SHORT).show();
bus_stationt = stand1[position];
bus_post = position;
}
public void onNothingSelected(AdapterView<?> arg0) {
// TODO Auto-generated method stub
}
}
class ac_busFromSpinner implements AdapterView.OnItemSelectedListener {
public void onItemSelected(AdapterView<?> parent, View v, int position, long id) {
Toast.makeText(v.getContext(), "You choose :" + stand[position], Toast.LENGTH_SHORT).show();
stationf = stand[position];
posf = position;
}
public void onNothingSelected(AdapterView<?> arg0) {
// TODO Auto-generated method stub
}
}
class ac_busToSpinner implements AdapterView.OnItemSelectedListener {
public void onItemSelected(AdapterView<?> parent, View v, int position, long id) {
Toast.makeText(v.getContext(), "You choose :" + stand1[position], Toast.LENGTH_SHORT).show();
stationt = stand1[position];
post = position;
}
public void onNothingSelected(AdapterView<?> arg0) {
// TODO Auto-generated method stub
}
}
public void onClick(View arg0) {
switch (arg0.getId()) {
case R.id.b1:
Intent busintent = new Intent(MainActivity.this, bus.class);
busintent.putExtra("busposf", bus_posf);
busintent.putExtra("buspost", bus_post);
busintent.putExtra("busstationf", bus_stationf);
busintent.putExtra("busstationt", bus_stationt);
startActivity(busintent);
break;
case R.id.b2:
Intent acbusintent = new Intent(MainActivity.this, acBus.class);
acbusintent.putExtra("acbusposf", posf);
acbusintent.putExtra("acbuspost", post);
acbusintent.putExtra("acbusstationf", stationf);
acbusintent.putExtra("acbusstationt", stationt);
startActivity(acbusintent);
break;
}
}
}
这是布局
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="match_parent"
>
<TabHost
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/tabhost"
android:layout_gravity="center_horizontal">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<TabWidget
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:id="@android:id/tabs"></TabWidget>
<FrameLayout
android:id="@android:id/tabcontent"
android:layout_width="match_parent"
android:layout_height="match_parent"
>
<RelativeLayout
android:id="@+id/tab1"
android:layout_width="match_parent"
android:layout_height="match_parent"
>
<TextView
android:id="@+id/tv1"
android:text="From:"
android:layout_width="wrap_content"
android:layout_height="40dp" />
<Spinner
android:layout_width="match_parent"
android:layout_height="60dp"
android:id="@+id/spinner1"
android:layout_below="@+id/tv1"/>
<TextView
android:id="@+id/tv2"
android:text="To:"
android:layout_below="@id/spinner1"
android:layout_width="wrap_content"
android:layout_height="40dp" />
<Spinner
android:layout_width="match_parent"
android:layout_height="60dp"
android:id="@+id/spinner2"
android:layout_below="@id/tv2" />
<DatePicker
android:id="@+id/datePicker1"
android:layout_width="wrap_content"
android:layout_height="80dp"
android:layout_below="@+id/spinner2"
android:datePickerMode="calendar"
android:layout_centerHorizontal="true"
android:layout_marginBottom="30dp" />
<Button
android:layout_width="fill_parent"
android:layout_height="50dp"
android:layout_below="@+id/datePicker1"
android:paddingLeft="140dp"
android:id="@+id/b1"
android:text="Search"
android:layout_gravity="center"
android:drawableLeft="@drawable/bus_icon"
android:gravity="center_vertical"/>
</RelativeLayout>
<RelativeLayout
android:id="@+id/tab2"
android:layout_width="match_parent"
android:layout_height="match_parent"
>
<TextView
android:id="@+id/tv3"
android:text="From:"
android:layout_width="wrap_content"
android:layout_height="40dp" />
<Spinner
android:layout_width="match_parent"
android:layout_height="60dp"
android:id="@+id/spinner3"
android:layout_below="@+id/tv3"/>
<TextView
android:id="@+id/tv4"
android:text="To:"
android:layout_below="@id/spinner3"
android:layout_width="wrap_content"
android:layout_height="40dp" />
<Spinner
android:layout_width="match_parent"
android:layout_height="60dp"
android:id="@+id/spinner4"
android:layout_below="@id/tv4" />
<DatePicker
android:id="@+id/datePicker2"
android:layout_width="wrap_content"
android:layout_height="80dp"
android:layout_below="@+id/spinner4"
android:datePickerMode="calendar"
android:layout_centerHorizontal="true"
android:layout_marginBottom="30dp" />
<Button
android:text="Search"
android:id="@+id/b2"
android:layout_below="@id/datePicker2"
android:layout_gravity="center"
android:drawableLeft="@drawable/bus_icon"
android:paddingLeft="140dp"
android:gravity="left|center_vertical"
android:layout_width="match_parent"
android:layout_height="50dp" />
</RelativeLayout>
</FrameLayout>
</LinearLayout>
</TabHost>
</LinearLayout>
现在我想在搜索按钮上方添加一个按钮，该按钮应显示最近由微调器做出的选择。