為什么我的eclipse開始Android包后變成這樣了和視頻不一樣
package com.example.demo1;
import android.support.v7.app.ActionBarActivity;
import android.support.v7.app.ActionBar;
import android.support.v4.app.Fragment;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.os.Build;
public class MainActivity extends ActionBarActivity {
??? @Override
??? protected void onCreate(Bundle savedInstanceState) {
??????? super.onCreate(savedInstanceState);
??????? setContentView(R.layout.activity_main);
??????? if (savedInstanceState == null) {
??????????? getSupportFragmentManager().beginTransaction()
??????????????????? .add(R.id.container, new PlaceholderFragment())
??????????????????? .commit();
??????? }
??? }
??? @Override
??? public boolean onCreateOptionsMenu(Menu menu) {
???????
??????? // Inflate the menu; this adds items to the action bar if it is present.
??????? getMenuInflater().inflate(R.menu.main, menu);
??????? return true;
??? }
??? @Override
??? public boolean onOptionsItemSelected(MenuItem item) {
??????? // Handle action bar item clicks here. The action bar will
??????? // automatically handle clicks on the Home/Up button, so long
??????? // as you specify a parent activity in AndroidManifest.xml.
??????? int id = item.getItemId();
??????? if (id == R.id.action_settings) {
??????????? return true;
??????? }
??????? return super.onOptionsItemSelected(item);
??? }
??? /**
???? * A placeholder fragment containing a simple view.
???? */
??? public static class PlaceholderFragment extends Fragment {
??????? public PlaceholderFragment() {
??????? }
??????? @Override
??????? public View onCreateView(LayoutInflater inflater, ViewGroup container,
??????????????? Bundle savedInstanceState) {
??????????? View rootView = inflater.inflate(R.layout.fragment_main, container, false);
??????????? return rootView;
??????? }
??? }
}
2017-03-12
課程視頻第一章第三講里有演示,需要刪除一部分代碼,就和視頻里一樣了。