简单实现美团城市切换

    1.添加依赖
compile 'com.zaaach:citypicker:1.1'

    2.配置文件 <application>里

<activity
    android:name="com.zaaach.citypicker.CityPickerActivity"
    android:screenOrientation="portrait"
    android:theme="@style/CityPicker.NoActionBar"
    android:windowSoftInputMode="stateHidden|adjustPan" />

<!--这里的value要替换成你项目的-->
<meta-data
    android:name="com.amap.api.v2.apikey"
    android:value="138e5cf1e8961ae326ff0908c03d1ae1" />
   
    3.ManActivity

private View resultTV;
private static final int REQUEST_CODE_PICK_CITY = 233;
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_cheng_shi);
    resultTV = findViewById(R.id.sss);

            startActivityForResult(new Intent(ChengShiActivity.this, CityPickerActivity.class), REQUEST_CODE_PICK_CITY);


}
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
    if (requestCode == REQUEST_CODE_PICK_CITY && resultCode == RESULT_OK){
        if (data != null){
            String city = data.getStringExtra(CityPickerActivity.KEY_PICKED_CITY);

        }
    }
}