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Ich verwende die android Navigationsschublade Vorlage und Fragmente, um verschiedene Ansichten anzuzeigen.Problem mit dem Ersetzen von Fragmentansichten in der Navigationsleiste
Als normal wird eine MainActivity, activity_main.xml und content_main.xml automatisch generiert.
Ich habe zwei Java-Klassen erstellt; MusicFragment und MainFragment und natürlich die Layoutdateien, in denen ich Inhalte habe.
Wenn ich die App die activity_main ist das Standardlayout gestartet, die ich willkommene Inhalte angezeigt habe, verwende ich die Navigation Schublade zu meinem MusicFragment und MainFragment zu navigieren, diesen Code ich die aktuelle Ansicht in der onNavigationItemSelected-Methode zu ersetzen ist;
if (id == R.id.nav_camara) {
fm.beginTransaction().replace(R.id.content_frame, new MainFragment()).commit();
} else if (id == R.id.nav_gallery) {
fm.beginTransaction().replace(R.id.content_frame, new MusicFragment()).commit();
diese funktionieren beide gut mit einander zu ersetzen, obwohl ich ein großes Problem, wenn ich das nav Schublade und drücken Sie die Kamera-Option wählen zeigt es die Ansicht Fragment aber ersetzt nicht den Inhalt von activity_main es das Fragment zeigt Inhalt oben auf der content_main und ersetzt es nicht.
Das ist mein MainActivity:
package com.justmikey.justmik;
import android.media.MediaPlayer;
import android.os.Bundle;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.Snackbar;
import android.support.v4.app.FragmentManager;
import android.support.v7.internal.widget.ButtonBarLayout;
import android.text.method.ScrollingMovementMethod;
import android.view.View;
import android.support.design.widget.NavigationView;
import android.support.v4.view.GravityCompat;
import android.support.v4.widget.DrawerLayout;
import android.support.v7.app.ActionBarDrawerToggle;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.Button;
import android.widget.TextView;
import JustMikey.Fragments.MainFragment;
import JustMikey.Fragments.MusicFragment;
public class MainActivity extends AppCompatActivity
implements NavigationView.OnNavigationItemSelectedListener {
//create a media player object called mp
MediaPlayer mp;
//declare my buttons play, pause and stop
Button play, pause,stop;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//Set the textView scrollMain to scrollable
TextView tv = (TextView) findViewById(R.id.scrollMain);
tv.setMovementMethod(new ScrollingMovementMethod());
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(
this, drawer, toolbar, R.string.navigation_drawer_open, R.string.navigation_drawer_close);
drawer.setDrawerListener(toggle);
toggle.syncState();
NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view);
navigationView.setNavigationItemSelectedListener(this);
}
@Override
public void onBackPressed() {
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
if (drawer.isDrawerOpen(GravityCompat.START)) {
drawer.closeDrawer(GravityCompat.START);
} else {
super.onBackPressed();
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.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;
}
return super.onOptionsItemSelected(item);
}
@SuppressWarnings("StatementWithEmptyBody")
@Override
public boolean onNavigationItemSelected(MenuItem item) {
android.app.FragmentManager fm = getFragmentManager();
int id = item.getItemId();
if (id == R.id.nav_camara) {
fm.beginTransaction().replace(R.id.content_frame, new MainFragment()).commit();
} else if (id == R.id.nav_gallery) {
fm.beginTransaction().replace(R.id.content_frame, new MusicFragment()).commit();
} else if (id == R.id.nav_slideshow) {
} else if (id == R.id.nav_manage) {
} else if (id == R.id.nav_share) {
} else if (id == R.id.nav_send) {
}
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
drawer.closeDrawer(GravityCompat.START);
return true;
}
}
content_main.xml:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
xmlns:app="http://schemas.android.com/apk/res-auto" android:layout_width="match_parent"
android:layout_height="match_parent" android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
android:paddingBottom="@dimen/activity_vertical_margin"
app:layout_behavior="@string/appbar_scrolling_view_behavior" tools:showIn="@layout/app_bar_main"
tools:context=".MainActivity"
android:background="#dbe4eb">
<FrameLayout
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:id="@+id/content_frame">
<ImageView
android:layout_width="355dp"
android:layout_height="wrap_content"
android:src="@drawable/jmmain"
android:id="@+id/imageView2"
android:layout_gravity="center_horizontal|top"
android:layout_alignRight="@+id/content_frame"
android:layout_alignEnd="@+id/content_frame" />
<TextView
android:layout_width="fill_parent"
android:layout_height="274dp"
android:text="hello hello hello hello hello hello hello hello"
android:id="@+id/scrollMain"
android:layout_gravity="center_horizontal|bottom"
android:layout_alignBottom="@+id/scrollView"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:layout_marginBottom="28dp"
android:layout_alignParentRight="true"
android:layout_alignParentEnd="true"
android:background="#ffffff"
android:padding="10dp"
/>
<ScrollView
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:id="@+id/scrollView"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:layout_gravity="center">
</ScrollView>
</FrameLayout>
</RelativeLayout>