我在Android Studio上使用 NavigationDrawerTemplate 创建了一个新的Activity
这是为 .java 类文件创建的代码
Homescreen.java
public class Homescreen extends AppCompatActivity
implements NavigationView.OnNavigationItemSelectedListener {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_homescreen);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
fab.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG)
.setAction("Action", null).show();
}
});
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.homescreen, 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) {
// Handle navigation view item clicks here.
int id = item.getItemId();
if (id == R.id.nav_camera) {
// Handle the camera action
} else if (id == R.id.nav_gallery) {
} 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;
}
}
创建模板时,侧导航栏图标的所有图标均为.xml格式
一个例子是 ic_menu_gallery.xml ,它创建了一个画廊图片的图标
<vector xmlns:android="http://schemas.android.com/apk/res/android"
android:width="24dp"
android:height="24dp"
android:viewportHeight="24.0"
android:viewportWidth="24.0">
<path
android:fillColor="#FF000000"
android:pathData="M22,16V4c0,-1.1 -0.9,-2 -2,-2H8c-1.1,0 -2,0.9 -2,2v12c0,1.1 0.9,2 2,2h12c1.1,0 2,-0.9 2,-2zm-11,-4l2.03,2.71L16,11l4,5H8l3,-4zM2,6v14c0,1.1 0.9,2 2,2h14v-2H4V6H2z" />
</vector>
但是,当我尝试将其更改为 PNG 文件时,它会抛出错误
08-17 19:31:33.257 10228-10228 / com.example.dd.ee_android_appliction E / AndroidRuntime:FATAL EXCEPTION:main java.lang.RuntimeException:无法启动活动ComponentInfo {com.example.dd.ee_android_appliction / com . example.dd.ee_android_appliction.Homescreen}:android.view.InflateException:二进制XML文件行#16:在android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2338)处输入类android.support.design.widget.NavigationView时出错android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2388)在Android.app.A活动时,我在Android.app.ActivityThread $ H.handleMessage(ActivityThread.java:1319)的android.app.ActivityThread.access $ 900(ActivityThread.java:148) . android.app.Looper.loop(Looper.java:137)的os.Handler.dispatchMessage(Handler.java:99)位于android.app.ActivityThread.main(ActivityThread.java:5457)的java.lang.reflect.Method .invokeNative(Native Method),位于com.android.internal.os.ZygoteInit的java.lang.reflect.Method.invoke(Method.java:525)$ MethodAndArgsC aller.run(ZygoteInit.java:854)at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:670)at dalvik.system.NativeStart.main(Native Method)引起:android.view.InflateException:二进制XML文件行#16:在android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:696)的android.view.LayoutInflater.createView(LayoutInflater.java:620)中填写android.support.design.widget.NavigationView类错误Android.view.LayoutInflater中的android.view.LayoutInflater.inflate(LayoutInflater.java:492)中的android.view.LayoutInflater.inflate(LayoutInflater.java:492)中的android.view.LayoutInflater.rInflate(LayoutInflater.java:495)位于android.support.v7.app.AppCompatDelegateImplV7.setContentView(AppCompatDelegateImplV7.java:249)的.inflate(LayoutInflater.java:353)位于com的android.support.v7.app.AppCompatActivity.setContentView(AppCompatActivity.java:106) . android.app.Activity.performCreate(Activity.java:5234)中的example.dd.ee_android_appliction.Homescreen.onCreate(Homescreen.java:22)在android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087)的android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2302)在Android.app的android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2388) . ActivityThread.access $ 900(ActivityThread.java:148)在Android.os.Looper的android.app.Handler.dispatchMessage(Handler.java:99)上的android.app.ActivityThread $ H.handleMessage(ActivityThread.java:1319) . 在java.lang.reflect.Method.invoke的java.lang.reflect.Method.invokeNative(Native Method)的android.app.ActivityThread.main(ActivityThread.java:5457)中循环(Looper.java:137)(方法 . java:525)at com.android.internal.os.ZygoteInit $ MethodAndArgsCaller.run(ZygoteInit.java:854)at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:670)at dalvik.system.NativeStart .main(本机方法)由java.lang.reflect.Constructor.newInstance中的java.lang.reflect.Constructor.constructNative(Native Method)中的java.lang.reflect.InvocationTargetException引起:在android.view.LayoutInflater.rInflate(LayoutInflater.java:755)的android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:696)的android.view.LayoutInflater.createView(LayoutInflater.java:594)中的Constructor.java:417) )在android.view.LayoutInflater.inflate(LayoutInflater.java:492)的android.view.LayoutInflater.inflate(LayoutInflater.java:397)android.view.LayoutInflater.inflate(LayoutInflater.java:353)android.support位于com.sexample.dd.ee_android_appliction.Homescreen.onCreate(Homescreen.java)的android.support.v7.app.AppCompatActivity.setContentView(AppCompatActivity.java:106)中的.v7.app.AppCompatDelegateImplV7.setContentView(AppCompatDelegateImplV7.java:249) :22)在android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087)的android.app.A活动中的android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2302)的android.app.Activity.performCreate(Activity.java:5234) .app.ActivityThread.handleLaunchActivity(ActivityThread.java:2388)atandroid.app.ActivityThread.access $ 900(ActivityThread.java:148)在Android.app.Handler.dispatchMessage(Handler.java:99)的android.app.ActivityThread $ H.handleMessage(ActivityThread.java:1319) . os.Looper.loop(Looper.java:137)位于java.lang.reflect.Method的java.lang.reflect.Method.invokeNative(Native Method)的android.app.ActivityThread.main(ActivityThread.java:5457) . 在dalvik的com.android.internal.os.ZygoteInit.main(ZygoteInit.java:670)的com.android.internal.os.ZygoteInit $ MethodAndArgsCaller.run(ZygoteInit.java:854)中调用(Method.java:525) .system.NativeStart.main(Native Method)由android.content.res.ResourcesEx.loadDrawable(ResourcesEx.java)中的android.content.res.ResourcesEx.getThemeDrawable(ResourcesEx.java:456)引起的java.lang.NullPointerException: 432)android.content.res.Resources.getDrawable(Resources.java:702)在android.support.v7.internal.widget.TintManager的android.support.v4.content.ContextCompat.getDrawable(ContextCompat.java:321) .getDrawable(TintManag er.java:145)在android.support.v.Internal.view上面的android.support.v7.internal.view.menu.MenuItemImpl.getIcon(MenuItemImpl.java:422).NavigationMenuPresenter $ NavigationMenuAdapter.prepareMenuItems(NavigationMenuPresenter.java:383)位于android.support.design.widget.NavigationView的android.support.design.internal.NavigationMenuPresenter $ NavigationMenuAdapter . (NavigationMenuPresenter.java:255)android.support.design.internal.NavigationMenuPresenter.getMenuView(NavigationMenuPresenter.java:97) . (NavigationView.java:149)位于java.lang.ref.Constructor.newInstance的java.lang.reflect.Constructor.constructNative(Native Method)的android.support.design.widget.NavigationView . (NavigationView.java:88) . 在android.view.LayoutInflater.rInflate(LayoutInflater.java:755)的android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:696)的android.view.LayoutInflater.createView(LayoutInflater.java:594)中的Constructor.java:417) )在android.view.LayoutInflater.inflate(LayoutInflater.java:492)at android.view.LayoutInflater.inflate(LayoutInflater.java:397)android.view.LayoutInflater.inflate(LayoutInflater.java:353)android.support.v7.app.AppCompatDelegateImplV7.setContentView(AppCompatDelegateImplV7.java:249)at android .support.v7.app.AppCompatActivity.setContentView(AppCompatActivity.java:106)位于android.app.Activity.performCreate(Activity.java:5234)的com.example.dd.ee_android_appliction.Homescreen.onCreate(Homescreen.java:22) )在android.app.Anstrumentation.callActivityOnCreate(Instrumentation.java:1087)android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2302)android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2388)android.app .ActivityThread.access $ 900(ActivityThread.java:148)在android.app.Aoo运行android.app.Handler.dispatchMessage(Handler.java:99)的android.app.ActivityThread $ H.handleMessage(ActivityThread.java:1319) .loop(Looper.java:137)位于java.lang.reflec的android.app.ActivityThread.main(ActivityThread.java:5457) t.Method.invokeNative(Native Method)位于com.android.internal.os.ZygoteInit $ MethodAndArgsCaller.run(ZygoteInit.java:854)的java.lang.reflect.Method.invoke(Method.java:525)中 . android.internal.os.ZygoteInit.main(ZygoteInit.java:670)at dalvik.system.NativeStart.main(Native Method)
我该怎么做才能导入 PNG 图标作为我的导航栏图标而不是 XML 格式?
编辑:
这里要求的是主屏幕布局xml代码谢谢!
<?xml version="1.0" encoding="utf-8"?>
<android.support.v4.widget.DrawerLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/drawer_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
tools:openDrawer="start">
<include
layout="@layout/app_bar_homescreen"
android:layout_width="match_parent"
android:layout_height="match_parent" />
<android.support.design.widget.NavigationView
android:id="@+id/nav_view"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_gravity="start"
android:fitsSystemWindows="true"
app:headerLayout="@layout/nav_header_homescreen"
app:menu="@menu/activity_homescreen_drawer" />
</android.support.v4.widget.DrawerLayout>
1 回答
在drawable-v21中,默认情况下包含VectorDrawable
所以你可以做的是删除文件夹drawable-v21或单个文件 .
并添加具有相同名称的
.png
.