Android AppCompatActivity

关系

• extends FragmentActivity
• implements AppCompatCallback, SupportParentable, DelegateProvider

与Activity 比较

setContentView

AppCompatActivity的setContentView ,调用this.getDelegate().setContentView(…)
而Acitivity的setContentView调用this.getWindow().setContentView(…)

// AppCompatActivity
public void setContentView(View view, LayoutParams params) {
  this.getDelegate().setContentView(view, params);
}

public void setContentView(@LayoutRes int layoutResID) {
  this.getDelegate().setContentView(layoutResID);
}

// Activity
public void setContentView(@LayoutRes int layoutResID) {
  getWindow().setContentView(layoutResID);
  initWindowDecorActionBar();
}

AppCompatActivity的setContentView调用的时候会调用一个this.getDelegate()