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戻るボタンでDrawerLayoutを閉じたい #Android #Java

Last updated at Posted at 2016-11-27

通常、戻るボタンを押すとActivityが終了してしまいます。DrawerLayoutが開いている時はActivityを終了させず、DrawerLayoutのみを閉じたい場合は以下のように実装します。

MainAcvity.java
DrawerLayout mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);

@Override
public void onBackPressed() {
  if(mDrawerLayout.isDrawerOpen(GravityCompat.START)) {
     //drawer is open
     mDrawerLayout.closeDrawer(Gravity.LEFT);
  }else{
     super.onBackPressed();
}
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