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我想停止后退按钮以关闭导航抽屉。如果有任何解决方案，请给我答案，如果你想。如何在导航抽屉打开时停止切换
我的代码是在这里，我已经使用了可扩展列表视图，其中首先会有没有孩子，但是当他点击任何项目时，我只是改变setAdapter的数组，并给他们的孩子。所以你能告诉我做什么改变像myntra左菜单实现。
import android.app.Activity;
import android.content.res.Configuration;
import android.graphics.Color;
import android.os.Bundle;
import android.support.v4.view.GravityCompat;
import android.support.v4.widget.DrawerLayout;
import android.support.v7.app.ActionBarDrawerToggle;
import android.util.Log;
import android.view.KeyEvent;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.ArrayAdapter;
import android.widget.ExpandableListView;
import com.teamtreehouse.oslist.Adapter.ExpandableListAdapter;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
public class MainActivity extends Activity {
private DrawerLayout mDrawerLayout;
private ActionBarDrawerToggle mDrawerToggle;
private String mActivityTitle;
ExpandableListAdapter listAdapter;
ExpandableListView expListView;
List<String> listDataHeader;
List<String> listDataHeader1;
private ArrayAdapter<String> mAdapter;
HashMap<String, List<String>> listDataChild;
HashMap<String, List<String>> listDataChild1;
public static boolean isBack = true;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
expListView = (ExpandableListView)findViewById(R.id.navList);mDrawerLayout = (DrawerLayout)findViewById(R.id.drawer_layout);
expListView.setBackgroundColor(Color.WHITE);
expListView.setGroupIndicator(null);
mActivityTitle = getTitle().toString();
prepareListData();
prepareListData1();
setupDrawer();
addDrawerItems();
getActionBar().setDisplayHomeAsUpEnabled(true);
getActionBar().setHomeButtonEnabled(true);
}
private void addDrawerItems() {
listAdapter = new ExpandableListAdapter(this, listDataHeader, listDataChild);
// setting list adapter
expListView.setAdapter(listAdapter);
Log.d("tag", "here i am in addDrawerItems");
// Listview Group click listener
expListView.setOnGroupClickListener(new ExpandableListView.OnGroupClickListener() {
@Override
public boolean onGroupClick(ExpandableListView parent, View v,
int groupPosition, long id) {
// Toast.makeText(getApplicationContext(),
// "Group Clicked " + listDataHeader.get(groupPosition),
// Toast.LENGTH_SHORT).show();
isBack = false;
listAdapter = new ExpandableListAdapter(MainActivity.this, listDataHeader1, listDataChild1);
// setting list adapter
expListView.setAdapter(listAdapter);
Log.d("tag", "here i am in setOngroupclick listitener");
return true;
}
});
}
private void setupDrawer() {
mDrawerToggle = new ActionBarDrawerToggle(this, mDrawerLayout, R.string.drawer_open, R.string.drawer_close) {
/** Called when a drawer has settled in a completely open state. */
public void onDrawerOpened(View drawerView) {
super.onDrawerOpened(drawerView);
getActionBar().setTitle("Navigation!");
invalidateOptionsMenu(); // creates call to onPrepareOptionsMenu()
}
/** Called when a drawer has settled in a completely closed state. */
public void onDrawerClosed(View view) {
super.onDrawerClosed(view);
getActionBar().setTitle(mActivityTitle);
invalidateOptionsMenu(); // creates call to onPrepareOptionsMenu()
}
};
mDrawerToggle.setDrawerIndicatorEnabled(true);
mDrawerLayout.setDrawerListener(mDrawerToggle);
}
@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
Log.d("tag","the keydown button");
if (android.os.Build.VERSION.SDK_INT < android.os.Build.VERSION_CODES.ECLAIR
&& keyCode == KeyEvent.KEYCODE_BACK
&& event.getRepeatCount() == 0) {
// Take care of calling this method on earlier versions of
// the platform where it doesn't exist.
onBackPressed();
}
return super.onKeyDown(keyCode, event);
}
@Override
public void onBackPressed() {
if (mDrawerLayout.isDrawerOpen(GravityCompat.START)) {
Log.d("tag","the back button is pressed");
return;
} else {
Log.d("tag","the back button is pressed2");
super.onBackPressed();
}
}
@Override
protected void onPostCreate(Bundle savedInstanceState) {
super.onPostCreate(savedInstanceState);
// Sync the toggle state after onRestoreInstanceState has occurred.
mDrawerToggle.syncState();
}
@Override
public void onConfigurationChanged(Configuration newConfig) {
super.onConfigurationChanged(newConfig);
mDrawerToggle.onConfigurationChanged(newConfig);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.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();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
// Activate the navigation drawer toggle
if (mDrawerToggle.onOptionsItemSelected(item)) {
return true;
}
return super.onOptionsItemSelected(item);
}
private void prepareListData() {
listDataHeader = new ArrayList<String>();
listDataChild = new HashMap<String, List<String>>();
// Adding child data
listDataHeader.add("Top 250");
listDataHeader.add("Now Showing");
listDataHeader.add("Coming Soon..");
// Adding child data
List<String> top250 = new ArrayList<String>();
top250.add("The Shawshan");
top250.add("The Godfather");
top250.add("The Godfathe");
top250.add("Pulp Fiction");
top250.add("The Good, t");
top250.add("The Dark ");
top250.add("12 Angry");
List<String> nowShowing = new ArrayList<String>();
nowShowing.add("The Conjuring");
nowShowing.add("Despicable");
nowShowing.add("Turbo");
nowShowing.add("Grown U");
nowShowing.add("Red 2");
nowShowing.add("The Wolveri");
List<String> comingSoon = new ArrayList<String>();
comingSoon.add("2 Guns");
comingSoon.add("The Smurfs 2");
comingSoon.add("The Spectacu");
comingSoon.add("The Canyons");
comingSoon.add("Europa Report");
listDataChild.put(listDataHeader.get(0), top250); // Header, Child data
listDataChild.put(listDataHeader.get(1), nowShowing);
listDataChild.put(listDataHeader.get(2), comingSoon);
}
private void prepareListData1() {
listDataHeader1 = new ArrayList<String>();
listDataChild1 = new HashMap<String, List<String>>();
// Adding child data
listDataHeader1.add("Second List");
listDataHeader1.add("New List");
listDataHeader1.add("Old List");
// Adding child data
List<String> top250 = new ArrayList<String>();
top250.add("The Shawshan");
top250.add("The Godfather");
top250.add("The Godfathe");
top250.add("Pulp Fiction");
top250.add("The Good, t");
top250.add("The Dark ");
top250.add("12 Angry");
List<String> nowShowing = new ArrayList<String>();
nowShowing.add("The Conjuring");
nowShowing.add("Despicable");
List<String> comingSoon = new ArrayList<String>();
comingSoon.add("2 Guns");
comingSoon.add("The Smurfs 2");
comingSoon.add("The Spectacu");
listDataChild1.put(listDataHeader1.get(0), top250); // Header, Child data
listDataChild1.put(listDataHeader1.get(1), nowShowing);
listDataChild1.put(listDataHeader1.get(2), comingSoon);
}
}
当您按下后退按钮时是否打印任何日志？你可以删除'onKeyDown'方法并重试吗？什么是您的应用程序的minSdkVersion？ – ataulm