我已经成功地利用抽屉布局设置了一个抽屉导航。我发现删除这行简单的代码会将汉堡包图标更改为后退按钮:
mDrawerToggle.syncState();
但是,当我确实想返回到上一个 Activity 时,当我单击后退按钮时它仍在打开抽屉导航。
我知道我可以简单地设置一个 onClickListener
,但我认为 Android 有一种更原生的方式来导航到上一个屏幕。这是我的代码:'
onCreate():
mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);
mDrawerToggle = new ActionBarDrawerToggle(
this, /* host Activity */
mDrawerLayout, /* DrawerLayout object */
toolbar, /* nav drawer icon to replace 'Up' caret */
R.string.drawer_open, /* "open drawer" description */
R.string.drawer_close /* "close drawer" description */
) {
/**
* Called when a drawer has settled in a completely closed state.
*/
public void onDrawerClosed(View view) {
super.onDrawerClosed(view);
isOpen = false;
}
/**
* Called when a drawer has settled in a completely open state.
*/
public void onDrawerOpened(View drawerView) {
super.onDrawerOpened(drawerView);
isOpen = true;
}
};
mDrawerLayout.addDrawerListener(mDrawerToggle);
mDrawerList = (ListView) findViewById(R.id.left_drawer);
ArrayList<String> drawerTitleArray = new ArrayList<>();
drawerTitleArray.add(0, "TEST");
drawerTitleArray.add(1, "TEST 1");
// Set the adapter for the list view
mDrawerList.setAdapter(new ArrayAdapter<String>(this,
R.layout.drawer_list_item, drawerTitleArray));
其他:
@Override
public boolean onOptionsItemSelected(MenuItem item){
return mDrawerToggle.onOptionsItemSelected(item) || super.onOptionsItemSelected(item);
}
@Override
protected void onPostCreate(Bundle savedInstanceState) {
super.onPostCreate(savedInstanceState);
// Sync the toggle state after onRestoreInstanceState has occurred.
mDrawerToggle.syncState();
}
最佳答案
在抽屉 Activity 的 onOptionsItemSelected()
中:
@Override
public boolean onOptionsItemSelected(MenuItem item){
if (item.getItemId() == android.R.id.home) {
super.onBackPressed();
return true;
}
else
return mDrawerToggle.onOptionsItemSelected(item) || super.onOptionsItemSelected(item);
}
关于java - 使用 DrawerLayout 后退按钮返回到上一个 Activity ,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/38546125/