我们在做android项目时经常会用到用户登录,这里呈上实现了Spinner的登录界面,初学的朋友可以直接拿过来使用。本界面使用的是流式布局,也是我最喜欢用的布局方式,同学们可以通过代码了解一下。代码中Intent的使用有点杂乱,主要是为了实现界面2选择完地址后,界面1已结填写的类容随着Activity来回传递,避免丢失。如果同学们有更好的实现方法就把那些Intent删除。
主界面MainActivity
import androidx.appcompat.app.AppCompatActivity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Spinner;
import android.widget.TextView;
public class MainActivity extends AppCompatActivity {
private Spinner spinner;
private ArrayAdapter<String> adapterspin;
String spinnertext;
TextView textView;
Button btn;
EditText ed1,ed2,ed3;
private static final String[] m={"汉族","回族","藏族","壮族","朝鲜族","维吾尔族"};
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
init();
btn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent intent = new Intent(MainActivity.this, cs.class);
intent.putExtra("ed1",ed1.getText().toString() );
intent.putExtra("ed2",ed2.getText().toString() );
intent.putExtra("ed3",ed3.getText().toString() );
startActivity(intent);
}
});
Intent intent =getIntent();
String dz = intent.getStringExtra("dz");
String user = intent.getStringExtra("ed1");
String password = intent.getStringExtra("ed2");
String rpassword = intent.getStringExtra("ed3");
ed1.setText(user);
ed2.setText(password);
ed3.setText(rpassword);
textView.setText(dz);
}
public void init(){
spinner=findViewById(R.id.spinner1);
spinner.setOnItemSelectedListener(new SpinnerSelectedListener());
adapterspin = new ArrayAdapter<String>(this,android.R.layout.simple_spinner_item,m);
adapterspin.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
spinner.setAdapter(adapterspin);
spinner.setOnItemSelectedListener(new SpinnerSelectedListener());
spinner.setVisibility(View.VISIBLE);
btn=findViewById(R.id.button);
textView=findViewById(R.id.textView10);
ed1=findViewById(R.id.ed1);
ed2=findViewById(R.id.ed2);
ed3=findViewById(R.id.ed3);
}
class SpinnerSelectedListener implements AdapterView.OnItemSelectedListener {
public void onItemSelected(AdapterView<?> arg0, View arg1, int arg2,
long arg3) {
spinnertext=m[arg2];
}
public void onNothingSelected(AdapterView<?> arg0) {
}
}
}
Spinner地址选择界面cs.java
import androidx.appcompat.app.AppCompatActivity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ListView;
import android.widget.Toast;
import java.util.ArrayList;
import java.util.List;
public class cs extends AppCompatActivity {
private ListView listView;
private List<String> mList = new ArrayList<>();
private List<String> mclist = new ArrayList<>();
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_cs);
initList();
Intent intent = getIntent();
String ed1=intent.getStringExtra("ed1");
String ed2=intent.getStringExtra("ed2");
String ed3=intent.getStringExtra("ed3");
mclist.add(ed1);
mclist.add(ed2);
mclist.add(ed3);
this.listView = (ListView) findViewById(R.id.listView);
final MyAdapter adapter = new MyAdapter(cs.this, mList,mclist);
listView.setAdapter(adapter);
//ListView item的点击事件
listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {
}
});
//ListView item 中的删除按钮的点击事件
adapter.setOnItemDeleteClickListener(new MyAdapter.onItemDeleteListener() {
@Override
public void onDeleteClick(int i) {
}
});
}
/**
* 初始化数据
*/
private void initList() {
mList.add("北京");
mList.add("上海");
mList.add("深圳");
mList.add("杭州");
mList.add("广州");
mList.add("杭州");
}
}
适配器MyAdapter.java
import android.content.Context;
import android.content.Intent;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.Button;
import android.widget.TextView;
import java.util.ArrayList;
import java.util.List;
public class MyAdapter extends BaseAdapter {
private Context mContext;
private List<String> mList = new ArrayList<>();
private List<String> mclist = new ArrayList<>();
public MyAdapter(Context context, List<String> list, List<String> clist) {
mContext = context;
mList = list;
mclist=clist;
}
@Override
public int getCount() {
return mList.size();
}
@Override
public Object getItem(int i) {
return mList.get(i);
}
@Override
public long getItemId(int i) {
return i;
}
@Override
public View getView(final int i, View view, ViewGroup viewGroup) {
ViewHolder viewHolder = null;
if (view == null) {
viewHolder = new ViewHolder();
view = LayoutInflater.from(mContext).inflate(R.layout.list_item, null);
viewHolder.mTextView = (TextView) view.findViewById(R.id.item_tv);
viewHolder.mButton = view.findViewById(R.id.item_btn);
view.setTag(viewHolder);
} else {
viewHolder = (ViewHolder) view.getTag();
}
viewHolder.mTextView.setText(mList.get(i));
viewHolder.mButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent intent = new Intent(mContext, MainActivity.class);
intent.putExtra("dz",mList.get(i) );
intent.putExtra("ed1",mclist.get(0) );
intent.putExtra("ed2",mclist.get(1) );
intent.putExtra("ed3",mclist.get(2) );
mContext.startActivity(intent);
}
});
return view;
}
/**
* 删除按钮的监听接口
*/
public interface onItemDeleteListener {
void onDeleteClick(int i);
}
private onItemDeleteListener mOnItemDeleteListener;
public void setOnItemDeleteClickListener(onItemDeleteListener mOnItemDeleteListener) {
this.mOnItemDeleteListener = mOnItemDeleteListener;
}
class ViewHolder {
TextView mTextView;
Button mButton;
}
}
对应的XML文件
activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:padding="40dp"
android:background="#FFFFFF">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#FFFFFF"
android:layout_marginBottom="20dp"
android:gravity="center"
android:orientation="horizontal">
<TextView
android:id="@+id/textView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="用户名:"
/>
<EditText
android:id="@+id/ed1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
/>
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#FFFFFF"
android:gravity="center"
android:layout_marginBottom="20dp"
android:orientation="horizontal">
<TextView
android:id="@+id/textView2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="密 码:"
/>
<EditText
android:id="@+id/ed2"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:inputType="textPassword"
/>
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#FFFFFF"
android:layout_marginBottom="20dp"
android:gravity="center"
android:orientation="horizontal">
<TextView
android:id="@+id/textView3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="确认密码:"
/>
<EditText
android:id="@+id/ed3"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:inputType="textPassword"
/>
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="20dp"
android:background="#FFFFFF"
android:orientation="horizontal">
<TextView
android:id="@+id/textView4"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="民 族:" />
<Spinner
android:id="@+id/spinner1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:spinnerMode="dropdown"
/>
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#FFFFFF"
android:layout_marginBottom="20dp"
android:orientation="horizontal">
<TextView
android:id="@+id/textView5"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="籍 贯:" />
<Button
android:id="@+id/button"
android:layout_width="153dp"
android:layout_height="46dp"
android:text="单击选择城市"
/>
<TextView
android:id="@+id/textView10"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
/>
</LinearLayout>
<Button
android:id="@+id/button2"
android:layout_width="match_parent"
android:layout_gravity="center"
android:layout_height="41dp"
android:text="提交"
/>
</LinearLayout>
activity_cs.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:padding="10dp"
android:layout_height="match_parent">
<ListView
android:id="@+id/listView"
android:layout_width="match_parent"
android:layout_height="wrap_content"
/>
</LinearLayout>
list_item.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:padding="20dp"
android:orientation="horizontal">
<TextView
android:id="@+id/item_tv"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="this is text"
android:textSize="24dp"/>
<androidx.appcompat.widget.AppCompatRadioButton
android:focusable="false"
android:id="@+id/item_btn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
/>
</LinearLayout>
结束。
后面同学们可以在MainActivity里添加按键的监听实现自己想要的功能了!其他一些改动可以自己完成。