Android App kann nicht gestartet werden ComponentInfo

Question

Ich bin neu in der Android-Programmierung und in letzter Zeit haben viele meiner Apps diesen Fehler bekommen. Hier

ist der Laufzeit-Stack-Trace:

01/26 17:02:17: Launching WelcomeActivity 
$ adb shell am start -n "com.example.android.smartswitch/com.example.android.smartswitch.WelcomeActivity" -a android.intent.action.MAIN -c android.intent.category.LAUNCHER 
Client not ready yet..Connected to process 4258 on device genymotion-custom_phone___7_0_0___api_24___768x1280-192.168.160.101:5555 
W/System: ClassLoader referenced unknown path: /data/app/com.example.android.smartswitch-2/lib/x86 
I/InstantRun: Instant Run Runtime started. Android package is com.example.android.smartswitch, real application class is null. 
W/System: ClassLoader referenced unknown path: /data/app/com.example.android.smartswitch-2/lib/x86 
W/art: Before Android 4.1, method android.graphics.PorterDuffColorFilter android.support.graphics.drawable.VectorDrawableCompat.updateTintFilter(android.graphics.PorterDuffColorFilter, android.content.res.ColorStateList, android.graphics.PorterDuff$Mode) would have incorrectly overridden the package-private method in android.graphics.drawable.Drawable 
D/AndroidRuntime: Shutting down VM 
E/AndroidRuntime: FATAL EXCEPTION: main 
       Process: com.example.android.smartswitch, PID: 4258 
       java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.android.smartswitch/com.example.android.smartswitch.WelcomeActivity}: java.lang.IllegalStateException: Already attached 
        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2646) 
        at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2707) 
        at android.app.ActivityThread.-wrap12(ActivityThread.java) 
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1460) 
        at android.os.Handler.dispatchMessage(Handler.java:102) 
        at android.os.Looper.loop(Looper.java:154) 
        at android.app.ActivityThread.main(ActivityThread.java:6077) 
        at java.lang.reflect.Method.invoke(Native Method) 
        at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:865) 
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:755) 
       Caused by: java.lang.IllegalStateException: Already attached 
        at android.support.v4.app.FragmentManagerImpl.attachController(FragmentManager.java:2815) 
        at android.support.v4.app.FragmentController.attachHost(FragmentController.java:104) 
        at android.support.v4.app.FragmentActivity.onCreate(FragmentActivity.java:317) 
        at android.support.v7.app.AppCompatActivity.onCreate(AppCompatActivity.java:88) 
        at com.example.android.smartswitch.WelcomeActivity.onCreate(WelcomeActivity.java:36) 
        at android.app.Activity.performCreate(Activity.java:6664) 
        at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1118) 
        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2599) 
        at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2707)  
        at android.app.ActivityThread.-wrap12(ActivityThread.java)  
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1460)  
        at android.os.Handler.dispatchMessage(Handler.java:102)  
        at android.os.Looper.loop(Looper.java:154)  
        at android.app.ActivityThread.main(ActivityThread.java:6077)  
        at java.lang.reflect.Method.invoke(Native Method)  
        at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:865)  
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:755)  
Application terminated. 

Ich versuche, ein Android-App zu machen, die eine introslider wie die here hat. Dies ist die MainActivity.java Datei:

package com.example.android.smartswitch; 

import android.content.Intent; 
import android.graphics.Color; 
import android.os.Bundle; 
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.view.View; 
import android.widget.Button; 

public class MainActivity extends AppCompatActivity 
    implements NavigationView.OnNavigationItemSelectedListener { 

int controllerButton = 1; 


@Override 
protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_main); 
    Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar); 
    setSupportActionBar(toolbar); 

    // but this is for testing 
    slidingScreenLauncher prefManager = new slidingScreenLauncher(getApplicationContext()); 
    prefManager.setFirstTimeLaunch(true); 


    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.addDrawerListener(toggle); 
    toggle.syncState(); 

    NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view); 
    navigationView.setNavigationItemSelectedListener(this); 
} 

public void onButtonClick (View view) { 
    String message = null; 
    switch (view.getId()) { 
     case R.id.settingsButton: 
      Intent intent = new Intent(this, logging_screen.class); 
      startActivity(intent); 
      break; 

     case R.id.controllerButton: 
      if (controllerButton == 1) { 
       Button button1 = (Button) findViewById(R.id.controllerButton); 
       button1.setBackgroundColor(Color.GREEN);  //Changing the background of the controllerButton. 
       button1.setText(getString(R.string.controller_off_text)); 
       Button headerButton = (Button) findViewById(R.id.headerText); 
       headerButton.setBackgroundColor(Color.RED); 
       headerButton.setTextColor(Color.BLACK); 
       headerButton.setText(getString(R.string.banner_off_text)); 

       controllerButton--;   //Setting the button int to zero for next change. 
      } 

      if (controllerButton == 0) { 
       Button button1 = (Button) findViewById(R.id.controllerButton); 
       button1.setBackgroundColor(Color.BLUE);  //Changing the background of the controllerButton. 
       button1.setText(getString(R.string.controller_on_text)); 
       Button headerButton = (Button) findViewById(R.id.headerText); 
       headerButton.setBackgroundColor(Color.BLACK); 
       headerButton.setTextColor(Color.WHITE); 
       headerButton.setText(getString(R.string.banner_on_text)); 
       controllerButton++;   //Setting the button int to one for nex change. An altering loop. 
      } 
      break; 
    } 
} 


@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) { 
    // Handle navigation view item clicks here. 
    int id = item.getItemId(); 

    if (id == R.id.scheduleSettingsSideBar) { 
     //Intent to send the user to scheduleSettings Screen. 
     Intent intent = new Intent(this, WelcomeActivity.class); 
     startActivity(intent); 

    } else if (id == R.id.manualSettingsSideBar) { 

    } else if (id == R.id.tempSettingsSideBar) { 
     //Intent to send the user to tempSettings Screen. 
     Intent intent = new Intent(this, temp_screen.class); 
     startActivity(intent); 
    } 

    else if (id == R.id.randomDelaySideBar) { 
     Intent intent = new Intent(this, random_delay.class); 
     startActivity(intent); 

    } else if (id == R.id.humiditySettingsSideBar) { 
     Intent intent = new Intent(this, humidity_settings.class); 
     startActivity(intent); 

    } else if (id == R.id.loggingSideBar) { 
     //Intent to send the user to loggingSidebar. 
     Intent intent = new Intent(this, logging_screen.class); 
     startActivity(intent); 

    } else if (id ==R.id.generalSettingsSideBar) { 

    } else if (id == R.id.playSliderAgain) { 
     /* We normally won't show the welcome slider again in real app 
     // but this is for testing 
     slidingScreenLauncher prefManager = new slidingScreenLauncher(getApplicationContext()); 
     // make first time launch TRUE 
     prefManager.setFirstTimeLaunch(true); 
     startActivity(new Intent(MainActivity.this, WelcomeActivity.class)); 
     finish(); */ 
    } 

    DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout); 
    drawer.closeDrawer(GravityCompat.START); 
    return true; 
    } 
} 

Hier ist die WelcomActivity.java Datei, die die introslider angezeigt werden soll:

package com.example.android.smartswitch; 

import android.support.v7.app.AppCompatActivity; 
import android.os.Bundle; 
import android.content.Context; 
import android.content.Intent; 
import android.graphics.Color; 
import android.os.Build; 
import android.support.v4.view.PagerAdapter; 
import android.support.v4.view.ViewPager; 
import android.text.Html; 
import android.view.LayoutInflater; 
import android.view.View; 
import android.view.ViewGroup; 
import android.view.Window; 
import android.view.WindowManager; 
import android.widget.Button; 
import android.widget.LinearLayout; 
import android.widget.TextView; 

public class WelcomeActivity extends AppCompatActivity { 

private ViewPager viewPager; 
private MyViewPagerAdapter myViewPagerAdapter; 
private LinearLayout dotsLayout; 
private TextView[] dots; 
private int[] layouts; 
private Button btnSkip, btnNext; 
private slidingScreenLauncher prefManager; 

@Override 
protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_welcome); 

    super.onCreate(savedInstanceState); 

    // Checking for first time launch - before calling setContentView() 
    prefManager = new slidingScreenLauncher(this); 
    if (!prefManager.isFirstTimeLaunch()) { 
     launchHomeScreen(); 
     finish(); 
    } 

    // Making notification bar transparent 
    if (Build.VERSION.SDK_INT >= 21) { 
     getWindow().getDecorView().setSystemUiVisibility(View.SYSTEM_UI_FLAG_LAYOUT_STABLE | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN); 
    } 

    setContentView(R.layout.activity_welcome); 

    viewPager = (ViewPager) findViewById(R.id.view_pager); 
    dotsLayout = (LinearLayout) findViewById(R.id.layoutDots); 
    btnSkip = (Button) findViewById(R.id.btn_skip); 
    btnNext = (Button) findViewById(R.id.btn_next); 


    // layouts of all welcome sliders 
    // add few more layouts if you want 
    layouts = new int[]{ 
      R.layout.welcome_slide1, 
      R.layout.welcome_slide2, 
      R.layout.welcome_slide3, 
      R.layout.welcome_slide4}; 

    // adding bottom dots 
    addBottomDots(0); 

    // making notification bar transparent 
    changeStatusBarColor(); 

    myViewPagerAdapter = new MyViewPagerAdapter(); 
    viewPager.setAdapter(myViewPagerAdapter); 
    viewPager.addOnPageChangeListener(viewPagerPageChangeListener); 

    btnSkip.setOnClickListener(new View.OnClickListener() { 
     @Override 
     public void onClick(View v) { 
      launchHomeScreen(); 
     } 
    }); 

    btnNext.setOnClickListener(new View.OnClickListener() { 
     @Override 
     public void onClick(View v) { 
      // checking for last page 
      // if last page home screen will be launched 
      int current = getItem(+1); 
      if (current < layouts.length) { 
       // move to next screen 
       viewPager.setCurrentItem(current); 
      } else { 
       launchHomeScreen(); 
      } 
     } 
    }); 
} 

private void addBottomDots(int currentPage) { 
    dots = new TextView[layouts.length]; 

    int[] colorsActive = getResources().getIntArray(R.array.array_dot_active); 
    int[] colorsInactive = getResources().getIntArray(R.array.array_dot_inactive); 

    dotsLayout.removeAllViews(); 
    for (int i = 0; i < dots.length; i++) { 
     dots[i] = new TextView(this); 
     dots[i].setText(Html.fromHtml("&#8226;")); 
     dots[i].setTextSize(35); 
     dots[i].setTextColor(colorsInactive[currentPage]); 
     dotsLayout.addView(dots[i]); 
    } 

    if (dots.length > 0) 
     dots[currentPage].setTextColor(colorsActive[currentPage]); 
} 

private int getItem(int i) { 
    return viewPager.getCurrentItem() + i; 
} 

private void launchHomeScreen() { 
    prefManager.setFirstTimeLaunch(false); 
    startActivity(new Intent(WelcomeActivity.this, MainActivity.class)); 
    finish(); 
} 

// viewpager change listener 
ViewPager.OnPageChangeListener viewPagerPageChangeListener = new ViewPager.OnPageChangeListener() { 

    @Override 
    public void onPageSelected(int position) { 
     addBottomDots(position); 

     // changing the next button text 'NEXT'/'GOT IT' 
     if (position == layouts.length - 1) { 
      // last page. make button text to GOT IT 
      btnNext.setText(getString(R.string.start)); 
      btnSkip.setVisibility(View.GONE); 
     } else { 
      // still pages are left 
      btnNext.setText(getString(R.string.next)); 
      btnSkip.setVisibility(View.VISIBLE); 
     } 
    } 

    @Override 
    public void onPageScrolled(int arg0, float arg1, int arg2) { 

    } 

    @Override 
    public void onPageScrollStateChanged(int arg0) { 

    } 
}; 

/** 
* Making notification bar transparent 
*/ 
private void changeStatusBarColor() { 
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) { 
     Window window = getWindow(); 
     window.addFlags(WindowManager.LayoutParams.FLAG_DRAWS_SYSTEM_BAR_BACKGROUNDS); 
     window.setStatusBarColor(Color.TRANSPARENT); 
    } 
} 

/** 
* View pager adapter 
*/ 
public class MyViewPagerAdapter extends PagerAdapter { 
    private LayoutInflater layoutInflater; 

    public MyViewPagerAdapter() { 
    } 

    @Override 
    public Object instantiateItem(ViewGroup container, int position) { 
     layoutInflater = (LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE); 

     View view = layoutInflater.inflate(layouts[position], container, false); 
     container.addView(view); 

     return view; 
    } 

    @Override 
    public int getCount() { 
     return layouts.length; 
    } 

    @Override 
    public boolean isViewFromObject(View view, Object obj) { 
     return view == obj; 
    } 


    @Override 
    public void destroyItem(ViewGroup container, int position, Object object) { 
     View view = (View) object; 
     container.removeView(view); 
    } 
    } 
} 

Die gemeinsamen Voreinstellungsdateien, die ich erstellt und gespeichert haben separat arbeitet fein. Das Hauptproblem ist meistens mit der Datei WelcomeActivity.java.

Schließlich ist hier die Manifeste Datei:

<?xml version="1.0" encoding="utf-8"?> 
<manifest xmlns:android="http://schemas.android.com/apk/res/android" 
package="com.example.android.smartswitch"> 

<application 
    android:allowBackup="true" 
    android:icon="@mipmap/ic_launcher" 
    android:label="@string/app_name" 
    android:supportsRtl="true" 
    android:theme="@style/AppTheme"> 
    <activity 
     android:name=".MainActivity" 
     android:label="@string/app_name" 
     android:theme="@style/AppTheme.NoActionBar"> 
     <intent-filter> 
      <action android:name="android.intent.action.MAIN" /> 

      <category android:name="android.intent.category.LAUNCHER" /> 
     </intent-filter> 
    </activity> 

    <activity 
     android:name=".WelcomeActivity"> 
     <intent-filter> 
      <action android:name="android.intent.action.VIEW" /> 

      <category android:name="android.intent.category.PREFERENCE" /> 
     </intent-filter> 
    </activity> 

    <activity 
     android:name=".temp_screen" 
     android:label="@string/title_activity_temp_screen" 
     android:theme="@style/AppTheme.NoActionBar" /> 
    <activity 
     android:name=".logging_screen" 
     android:label="@string/title_activity_logging_screen" 
     android:theme="@style/AppTheme.NoActionBar" /> 
    <activity 
     android:name=".humidity_settings" 
     android:label="@string/title_activity_humidity_settings" 
     android:theme="@style/AppTheme.NoActionBar" /> 
    <activity 
     android:name=".random_delay" 
     android:label="@string/title_activity_random_delay" 
     android:theme="@style/AppTheme.NoActionBar" /> 

</application> 

Kann mir bitte jemand sagen, wo soll ich falsch ?? Außerdem weiß ich nicht, wie man die Manifeste einstellt, so dass der IntroSlider am Anfang angezeigt wird und dann die MainActivity beginnt (ich denke auch über das Hinzufügen eines SplashScreens nach)

Jede Hilfe wird sehr geschätzt, ohne diese kann ich ‚t sogar meine App testen und verbessern ....

Answer 1

Sie sind

super.onCreate(savedInstanceState); 
`setContentView(R.layout.activity_welcome);` 

Verwenden Sie diese zweimal in Aktivität bitte entfernen Sie es.

Kommentar diese Zeilen

super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_welcome); 

    // super.onCreate(savedInstanceState); 

    // Checking for first time launch - before calling setContentView() 
    prefManager = new slidingScreenLauncher(this); 
    if (!prefManager.isFirstTimeLaunch()) { 
     launchHomeScreen(); 
     finish(); 
    } 

    // Making notification bar transparent 
    if (Build.VERSION.SDK_INT >= 21) { 
     getWindow().getDecorView().setSystemUiVisibility(View.SYSTEM_UI_FLAG_LAYOUT_STABLE | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN); 
    } 

    // setContentView(R.layout.activity_welcome); 

Answer 2

zweimal super.onCreate(savedInstanceState); geschrieben entfernen und setContentView(R.layout.activity_welcome);:

Willkommen Aktivität:

@Override 
protected void onCreate(Bundle savedInstanceState) { 
super.onCreate(savedInstanceState); 
setContentView(R.layout.activity_welcome); 

//removed super.onCreate(savedInstanceState); 
//removed setContentView(R.layout.activity_welcome);