我有一个MainActivity.java和NavigationDrawer。我想点击navdrawer中的项目,开始新的布局。我知道我可以开始新的活动,但我不想要一个新的活动。新的布局适合我。这可能吗???
这是我的ActivityMain.java:
public class MainActivity extends AppCompatActivity {
public Toolbar toolbar;
protected DrawerLayout drawerLayout;
NavigationView navigationView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
getWindow().getDecorView().setLayoutDirection(View.LAYOUT_DIRECTION_RTL);
toolbar = (Toolbar) findViewById(R.id.toolbar);
drawerLayout = (DrawerLayout) findViewById(R.id.a1);
setSupportActionBar(toolbar);
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
getSupportActionBar().setHomeAsUpIndicator(R.drawable.ic_more_vert_black_24dp);
navigationView = (NavigationView) findViewById(R.id.a2);
navigationView.setNavigationItemSelectedListener(new NavigationView.OnNavigationItemSelectedListener() {
@Override
public boolean onNavigationItemSelected(@NonNull MenuItem item) {
item.setChecked(true);
drawerLayout.closeDrawer(Gravity.RIGHT);
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
public boolean onOptionsItemSelected(MenuItem item) {
int id = item.getItemId();
if (id == R.id.khat) {
if (drawerLayout.isDrawerOpen(Gravity.RIGHT)) {
drawerLayout.closeDrawer(Gravity.RIGHT);
}
else {
drawerLayout.openDrawer(Gravity.RIGHT);
}
return super.onOptionsItemSelected(item);
}
else {
Toast.makeText(getApplicationContext(),"SOMETHING",Toast.LENGTH_LONG).show();
}
return true;
}
public void onBackPressed(){
if (drawerLayout.isDrawerOpen(Gravity.RIGHT)){
drawerLayout.closeDrawer(Gravity.RIGHT);
}else {super.onBackPressed();}
}
}
这是我想要在点击项目时开始的第二个布局:`
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:orientation="vertical"
android:layout_width="match_parent"
android:background="#132740"
android:layout_height="match_parent">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginRight="20dp"
android:layout_marginBottom="20dp"
android:layout_marginLeft="20dp"
android:textColor="#FFFFFF"
android:id="@+id/textView"
android:textSize="22sp"
android:layout_marginTop="20dp"
android:text="blah blah"/>
</RelativeLayout>
这可能吗?
答案 0 :(得分:0)
如果只是你想改变的布局,有一个非常简单的解决方案:
if (Case_A)
setContentView(R.layout.layout1);
else if (Case_B)
setContentView(R.layout.layout2);
但考虑使用碎片:
https://developer.android.com/guide/components/fragments.html
对于每个布局,使用片段,您将能够将代码划分为多个类。它将更具可读性和轻量级:
答案 1 :(得分:0)
使用片段以使用不同操作的多个布局。如果您只想更改布局,那么您可以使用setContentView(新布局)在项目点击上设置新布局;