import。。。省略了什么?
public class MainActivity extends AppCompatActivity {上面那个
我 import android.support.v4.app.AppCompatActivity; v4、v7都不行
public class MainActivity extends AppCompatActivity {上面那个
我 import android.support.v4.app.AppCompatActivity; v4、v7都不行
2019-06-27
package com.genew.irrigation.setting; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import com.genew.irrigation.R; public class MainActivity extends AppCompatActivity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); } }
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