我使用SherlockFragment创建了导航抽屉。抽屉里有两个项目 -
我想实现如下，如果用户在Fragment2上按下后退按钮，那么他/她应该被重定向到fragment1。
public class Drawer extends SherlockFragmentActivity {
DrawerLayout mDrawerLayout;
ListView mDrawerList;
ActionBarDrawerToggle mDrawerToggle;
MenuListAdapter mMenuAdapter;
String[] title;
String[] subtitle;
int[] icon;
Fragment fragment1 = new Fragment1();
Fragment fragment2 = new Fragment2();
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.drawer_main);
title = new String[] { "Post a Squib", "Edit Profile"};
icon = new int[] { R.drawable.action_about, R.drawable.action_settings};
mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);
mDrawerList = (ListView) findViewById(R.id.left_drawer);
mDrawerLayout.setDrawerShadow(R.drawable.drawer_shadow,
GravityCompat.START);
mMenuAdapter = new MenuListAdapter(this, title, icon);
mDrawerList.setAdapter(mMenuAdapter);
mDrawerList.setOnItemClickListener(new DrawerItemClickListener());
getSupportActionBar().setHomeButtonEnabled(true);
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
mDrawerToggle = new ActionBarDrawerToggle(this, mDrawerLayout,
R.drawable.ic_drawer, R.string.drawer_open,
R.string.drawer_close) {
public void onDrawerClosed(View view) {
// TODO Auto-generated method stub
super.onDrawerClosed(view);
}
public void onDrawerOpened(View drawerView) {
// TODO Auto-generated method stub
super.onDrawerOpened(drawerView);
}
};
mDrawerLayout.setDrawerListener(mDrawerToggle);
if (savedInstanceState == null) {
selectItem(0);
}
}
@Override
public void onBackPressed() {
// TODO Auto-generated method stub
// super.onBackPressed();
if (mDrawerLayout.isDrawerOpen(mDrawerList)) {
mDrawerLayout.closeDrawer(mDrawerList);
}else{
//i want changes in this part
// currently when user is in second fragment/first fragment and press back button then dialogue box is appeared
//But I'd like to have such like user press back button in fragment2 it should be redirected to fragment1.
final Builder builder = new Builder(this);
builder.setTitle("Attention");
builder.setMessage("Do you really want to exit?");
builder.setPositiveButton(android.R.string.ok, new OnClickListener() {
@Override
public void onClick(final DialogInterface dialog, final int which) {
Drawer.this.finish();
dialog.dismiss();
}
});
builder.setNegativeButton(android.R.string.cancel,
new OnClickListener() {
@Override
public void onClick(final DialogInterface dialog,
final int which) {
dialog.dismiss();
}
});
final AlertDialog dialog = builder.create();
dialog.show();
}
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
if (item.getItemId() == android.R.id.home) {
if (mDrawerLayout.isDrawerOpen(mDrawerList)) {
mDrawerLayout.closeDrawer(mDrawerList);
} else {
mDrawerLayout.openDrawer(mDrawerList);
}
}
return super.onOptionsItemSelected(item);
}
// The click listener for ListView in the navigation drawer
private class DrawerItemClickListener implements
ListView.OnItemClickListener {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position,
long id) {
selectItem(position);
}
}
private void selectItem(int position) {
FragmentTransaction ft = getSupportFragmentManager().beginTransaction();
// Locate Position
switch (position) {
case 0:
ft.replace(R.id.content_frame, fragment1);
break;
case 1:
ft.replace(R.id.content_frame, fragment2);
break;
}
ft.commit();
mDrawerList.setItemChecked(position, true);
// Close drawer
mDrawerLayout.closeDrawer(mDrawerList);
}
}
答案 0 :(得分：0)
我没有在sherelock libs上工作，但我工作了一点。
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId())
{
case android.R.id.home:
// Do whatever you want, e.g. finish()
finish();
break;
}
return true;
}
}
希望它会对你有所帮助。如果您需要详细信息，请点击以下链接。
How to disable back button pressed in android fragment class