我从按钮的onClick切换DrawerLayout的状态，并禁用其滑动。
这工作正常，但当活动改变其方向时，抽屉不会保持其状态; 如果已打开，则会关闭。它甚至会添加if (!$CLEAN_Var) { return $CLEAN_Var = null; }
// validate input
$valid = true;
// insert data
if ($valid) {
$pdo->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
$sql = "INSERT INTO Table ("
."ColumnNames"
.")"
."VALUES("
."?"
.")";
$q = $pdo->prepare($sql);
$q->execute(array($CLEAN_Var));
// Once INSERT is completed, we will redirect.
header("Location:" 'link.php'); exit;
}
。
我的活动中的代码：
android:configChanges="keyboardHidden|orientation"一个可能的解决方案是我在活动private DrawerLayout drawer;
private int drawerLayoutGravity = Gravity.RIGHT;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_login);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
disableDrawer();
View btnOpenDrawer = findViewById(R.id.btn_open_drawer);
btnOpenDrawer.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
toggleDrawerState();
}
});
}
private void toggleDrawerState() {
if (drawer.isDrawerOpen(drawerLayoutGravity)) {
drawer.closeDrawer(drawerLayoutGravity);
} else {
drawer.openDrawer(drawerLayoutGravity);
}
}
/**
* doesn't let the user swipe to open the drawer
*/
private void disableDrawer() {
drawer.setDrawerLockMode(DrawerLayout.LOCK_MODE_LOCKED_CLOSED);
}
上打开DrawerLayout，但我需要在配置更改时避免显示DrawerLayout重新打开。
答案 0 :(得分：3)
您在抽屉上设置了关闭锁定模式以禁用滑动。即使您已禁用Activity重新创建，方向更改也会触发View上的布局事件，而DrawerLayout会根据锁定设置抽屉状态自我解决的模式。
每当您以编程方式打开/关闭抽屉时，都需要更新锁定模式。
private void toggleDrawerState() {
if (drawer.isDrawerOpen(drawerLayoutGravity)) {
drawer.closeDrawer(drawerLayoutGravity);
drawer.setDrawerLockMode(DrawerLayout.LOCK_MODE_LOCKED_CLOSED);
} else {
drawer.openDrawer(drawerLayoutGravity);
drawer.setDrawerLockMode(DrawerLayout.LOCK_MODE_LOCKED_OPEN);
}
}