UUID随机数字

利用UUID生成完全不重复的数字 package com.example.uuid; import java.util.UUID; import android.app.Activity; import android.os.Bundle; import android.view.View; import android.view.View.OnClickListener; import android.widget.Button; import android.widget.TextView; public class MainActivity extends Activity implements OnClickListener { private TextView tv; private Button button1; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); button1 = (Button) findViewById(R.id.button1); tv = (TextView) findViewById(R.id.tv); button1.setOnClickListener(this); UUID uuid = UUID.randomUUID(); tv.setText(uuid.toString()); } @Override public void onClick(View v) { UUID uuid = UUID.randomUUID(); tv.setText(uuid.toString()); } }

百度地图 定位城市或者详细信息

定位城市或者详细信息百度地图act_person_location = (TextView) findViewById(R.id.act_person_location); mLocationClient = new LocationClient(context.getApplicationContext()); //声明LocationClient类 LocationClientOption option = new LocationClientOption(); option.setLocationMode(LocationMode.Hight_Accuracy);//设置定位模式 option.setCoorType("bd09ll");//返回的定位结果是百度经纬度,默认值gcj02 option.setScanSpan(5000);//设置发起定位请求的间隔时间为5000ms option.setIsNeedAddress(true);//返回的定位结果包含地址信息 // option.setNeedDeviceDirect(true);//返回的定位结果包含手机机头的方向 mLocationClient.setLocOption(option); mLocationClient.registerLocationListener( new BDLocationListener() { @Override public void onReceiveLocation(BDLocation location) { if (location == null) return ; // act_person_location.setText(location.getAddrStr());获取详细地址 act_person_location.setText(location.getCity());//获取城市 } } ); //注册监听函数 mLocationClient.start();