アプリはスプラッシュ画面の後に風景モードで複数回起動するようですか？

Question

私はスプラッシュ画面を持っており、その後、私の主な活動が始まります。このは、ポートレートモードでは正常に動作します風景モードで私の携帯電話を傾けた場合、のメインアクティビティは、スプラッシュ画面の後に2回以上起動することがあります。

私はandroid：launchMode = "singleInstance"を使用してみましたが、その場合、フィードバック警告ボックスにファイルを添付できません。

MainActivity.java

package com.example.android.tel; 

import android.app.Activity; 
import android.app.Dialog; 
import android.content.Intent; 
import android.content.pm.ActivityInfo; 
import android.content.res.Configuration; 
import android.graphics.Color; 
import android.graphics.Paint; 
import android.graphics.drawable.ColorDrawable; 
import android.net.Uri; 
import android.os.Handler; 
import android.support.v7.app.AppCompatActivity; 
import android.os.Bundle; 
import android.support.v7.widget.CardView; 
import android.support.v7.widget.Toolbar; 
import android.view.View; 
import android.view.Window; 
import android.view.inputmethod.InputMethodManager; 
import android.widget.AdapterView; 
import android.widget.ArrayAdapter; 
import android.widget.EditText; 
import android.widget.ImageView; 
import android.widget.ListView; 
import android.widget.TextView; 
import android.widget.Toast; 

import com.crashlytics.android.Crashlytics; 

import java.util.ArrayList; 
import java.util.regex.Matcher; 
import java.util.regex.Pattern; 


public class MainActivity extends AppCompatActivity { 
    Toolbar mActionBarToolbar; 
    TextView toolbar_title_mainActivity, main_textView, disclaimer_txtView; 
    CardView SearchDept, SearchName, disclaimer, feedback; 
    ImageView back; 
    ArrayList<Uri> arrayUri = new ArrayList<Uri>(); 
    ArrayAdapter<Uri> myFileListAdapter; 
    ListView listViewFiles; 
    Dialog alertDialog; 

    final int RQS_LOADIMAGE = 0; 
    final int RQS_SENDEMAIL = 1; 


    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 


     if (getResources().getConfiguration().orientation == 
       Configuration.ORIENTATION_PORTRAIT) { 
      setContentView(R.layout.activity_main); 
     } else { 
      setContentView(R.layout.activity_main); 
     } 

     mActionBarToolbar = (Toolbar) findViewById(R.id.tool_bar_main_activity); 
     toolbar_title_mainActivity = (TextView) findViewById(R.id.toolbar_title); 
     main_textView = (TextView) findViewById(R.id.main_textView); 
     main_textView.setPaintFlags(main_textView.getPaintFlags() | Paint.UNDERLINE_TEXT_FLAG); 
     setSupportActionBar(mActionBarToolbar); 
     getSupportActionBar().setDisplayShowTitleEnabled(false); 
     toolbar_title_mainActivity.setText("Hry. Govt. Telephone Directory"); 
     back = (ImageView) findViewById(R.id.back); 
     back.setVisibility(View.INVISIBLE); 
     disclaimer = (CardView) findViewById(R.id.disclaimer); 
     feedback = (CardView) findViewById(R.id.feedback); 

     SearchDept = (CardView) findViewById(R.id.cardView1_mainActivity); 
     SearchName = (CardView) findViewById(R.id.cardView2_mainActivity); 
     SearchDept.setOnClickListener(new View.OnClickListener() { 
      @Override 
      public void onClick(View v) { 
       Intent i = new Intent(MainActivity.this, CardViewActivity.class); 
       startActivity(i); 
      } 
     }); 

     SearchName.setOnClickListener(new View.OnClickListener() { 
      @Override 
      public void onClick(View v) { 
       Intent j = new Intent(MainActivity.this, ByNameListActivity.class); 
       startActivity(j); 
      } 
     }); 

     disclaimer.setOnClickListener(new View.OnClickListener() { 
      @Override 
      public void onClick(View v) { 
       Dialog alertDialog = new Dialog(MainActivity.this); 
       alertDialog.requestWindowFeature(Window.FEATURE_NO_TITLE); 
       alertDialog.setContentView(R.layout.disclaimer); 
       alertDialog.getWindow().setBackgroundDrawable(new ColorDrawable(Color.WHITE)); 
       alertDialog.show(); 
      } 
     }); 

     feedback.setOnClickListener(new View.OnClickListener() { 
      @Override 
      public void onClick(View v) { 
       alertDialog = new Dialog(MainActivity.this); 
       alertDialog.requestWindowFeature(Window.FEATURE_NO_TITLE); 
       alertDialog.setContentView(R.layout.feedback); 
       alertDialog.getWindow().setBackgroundDrawable(new ColorDrawable(Color.WHITE)); 
       alertDialog.setCanceledOnTouchOutside(true); 

       ImageView send_btn=(ImageView)alertDialog.findViewById(R.id.send); 
       ImageView attach_btn=(ImageView)alertDialog.findViewById(R.id.attachment); 
       final TextView to_email_add=(TextView)alertDialog.findViewById(R.id.email_address); 
       to_email_add.setText("tel@gmail.com"); 
       final EditText email_subject=(EditText)alertDialog.findViewById(R.id.email_subject); 
       final EditText email_text=(EditText)alertDialog.findViewById(R.id.email_text); 
       final EditText mobile_no=(EditText)alertDialog.findViewById(R.id.mobile_text); 

       email_subject.setOnFocusChangeListener(new View.OnFocusChangeListener() { 
        @Override 
        public void onFocusChange(View v, boolean hasFocus) { 
         if (!hasFocus) { 
          hideKeyboard(v); 
         } 
        } 
       }); 

       email_text.setOnFocusChangeListener(new View.OnFocusChangeListener() { 
        @Override 
        public void onFocusChange(View v, boolean hasFocus) { 
         if (!hasFocus) { 
          hideKeyboard(v); 
         } 
        } 
       }); 

       myFileListAdapter = new ArrayAdapter<Uri>(
         MainActivity.this, 
         android.R.layout.simple_list_item_1, 
         arrayUri); 
       listViewFiles = (ListView)alertDialog.findViewById(R.id.filelist); 
       listViewFiles.setAdapter(myFileListAdapter); 

       listViewFiles.setOnItemLongClickListener(new AdapterView.OnItemLongClickListener() { 
        @Override 
        public boolean onItemLongClick(AdapterView<?> parent, View view, int position, long id) { 

         myFileListAdapter.remove(arrayUri.get(position)); 
         myFileListAdapter.notifyDataSetChanged(); 
         Toast.makeText(view.getContext(), "You unattached one item", Toast.LENGTH_LONG).show(); 
         return false; 
        } 
       }); 



       attach_btn.setOnClickListener(new View.OnClickListener() { 
        @Override 
        public void onClick(View v) { 
         Intent intent = new Intent(Intent.ACTION_PICK, 
           android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI); 
         startActivityForResult(intent, RQS_LOADIMAGE); 

        } 
       }); 


       send_btn.setOnClickListener(new View.OnClickListener() { 
        @Override 
        public void onClick(View v) { 
         String email_add=to_email_add.getText().toString(); 
         String email_sub=email_subject.getText().toString(); 
         String email_txt=email_text.getText().toString(); 
         String emailAddressList[] = {email_add}; 
         String mobileNo=mobile_no.getText().toString(); 
         String info=email_txt+"\n\nPhone Number :"+mobileNo; 


         Intent intent = new Intent(); 
         intent.putExtra(Intent.EXTRA_EMAIL, emailAddressList); 
         intent.putExtra(Intent.EXTRA_SUBJECT, email_sub); 
         intent.putExtra(Intent.EXTRA_TEXT,info); 

         if(arrayUri.isEmpty()&& isValidPhone(mobileNo)&& !(mobileNo.isEmpty())){ 
          //send email without photo attached 
          intent.setAction(Intent.ACTION_SEND); 
          intent.setType("plain/text"); 

          new Handler().postDelayed(new Runnable() { 

           public void run() { 
            alertDialog.dismiss(); 
           } 
          }, 5000); 

         }else if(arrayUri.size() == 1 && isValidPhone(mobileNo)&& !(mobileNo.isEmpty())){ 
          //send email with ONE photo attached 
          intent.setAction(Intent.ACTION_SEND); 
          intent.putExtra(Intent.EXTRA_STREAM, arrayUri.get(0)); 
          intent.setType("image/*"); 

          new Handler().postDelayed(new Runnable() { 

           public void run() { 
            alertDialog.dismiss(); 
           } 
          }, 5000); 

         }else if(arrayUri.size()>1&& isValidPhone(mobileNo)&& !(mobileNo.isEmpty())){ 
          //send email with MULTI photo attached 
          intent.setAction(Intent.ACTION_SEND_MULTIPLE); 
          intent.putParcelableArrayListExtra(Intent.EXTRA_STREAM, arrayUri); 
          intent.setType("image/*"); 

          new Handler().postDelayed(new Runnable() { 

           public void run() { 
            alertDialog.dismiss(); 
           } 
          }, 5000); 

         } 
         else { 
          Toast.makeText(v.getContext(), "Phone number is not valid", Toast.LENGTH_LONG).show(); 
         } 

         startActivity(Intent.createChooser(intent, "Please provide valid details")); 

        } 
       }); 

       alertDialog.show(); 
      } 
     }); 



    } 

    @Override 
    protected void onActivityResult(int requestCode, int resultCode, Intent data) { 
     // TODO Auto-generated method stub 
     super.onActivityResult(requestCode, resultCode, data); 

     if (resultCode == RESULT_OK){ 
      switch(requestCode){ 
       case RQS_LOADIMAGE: 
        Uri imageUri = data.getData(); 
        arrayUri.add(imageUri); 
        myFileListAdapter.notifyDataSetChanged(); 
        break; 
       case RQS_SENDEMAIL: 
        break; 
      } 
     } 
    } 

    public static boolean isValidPhone(String phone) 
    { 
     String expression = "^([0-9\\+]|\\(\\d{1,3}\\))[0-9\\-\\. ]{3,15}$"; 
     CharSequence inputString = phone; 
     Pattern pattern = Pattern.compile(expression); 
     Matcher matcher = pattern.matcher(inputString); 
     if (matcher.matches()) 
     { 
      return true; 
     } 
     else{ 
      return false; 
     } 
    } 

    public void hideKeyboard(View view) { 
     InputMethodManager inputMethodManager =(InputMethodManager)getSystemService(Activity.INPUT_METHOD_SERVICE); 
     inputMethodManager.hideSoftInputFromWindow(view.getWindowToken(), 0); 
    } 

    public void onConfigurationChanged(Configuration newConfig) { 
     super.onConfigurationChanged(newConfig); 
     int orientation; 
     if (getResources().getConfiguration().orientation == 
       Configuration.ORIENTATION_PORTRAIT) { 
      orientation = ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE; 
      // or = ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE 
     }else { 
      orientation = ActivityInfo.SCREEN_ORIENTATION_REVERSE_PORTRAIT; 
     } 
     // Add code if needed 
//  listViewFiles.setAdapter(myFileListAdapter); 
//  myFileListAdapter.notifyDataSetChanged(); 
     setRequestedOrientation(orientation); 
    } 


} 

activity_main.xml

<?xml version="1.0" encoding="utf-8"?> 
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    xmlns:tools="http://schemas.android.com/tools" 
    xmlns:card_view="http://schemas.android.com/apk/res-auto" 
    android:orientation="vertical" 
    android:weightSum="14" 
    android:id="@+id/activity_main" 
    android:layout_width="match_parent" 
    android:layout_height="match_parent" 
    android:layout_centerInParent="true" 
    tools:context="com.example.android.tel.MainActivity"> 

    <include 
     android:id="@+id/tool_bar_main_activity" 
     layout="@layout/toolbar"> 
    </include> 

    <TextView 
     android:id="@+id/main_textView" 
     android:layout_width="match_parent" 
     android:layout_height="0dp" 
     android:layout_weight="0.5" 
     android:layout_marginTop="10dp" 
     android:text="How would you like to search?" 
     android:textStyle="bold" 
     android:textSize="14sp" 
     android:textColor="#1A237E" 
     android:gravity="center_horizontal"/> 

    <RelativeLayout 
     android:id="@+id/searchby_btns" 
     android:layout_width="wrap_content" 
     android:layout_height="0dp" 
     android:layout_weight="4" 
     android:paddingLeft="16dp" 
     android:paddingRight="16dp" 
     android:gravity="center_vertical"> 

    <android.support.v7.widget.CardView 
     android:id="@+id/cardView1_mainActivity" 
     android:layout_width="match_parent" 
     android:layout_height="50dp" 
     android:layout_gravity="center" 
     card_view:cardCornerRadius="4dp" 
     android:layout_marginTop="10dp" 
     card_view:cardBackgroundColor="#e97c1d"> 

     <RelativeLayout 
      android:layout_width="match_parent" 
      android:layout_height="match_parent" 
      android:paddingLeft="10dp"> 
     <TextView 
      android:layout_width="wrap_content" 
      android:layout_height="wrap_content" 
      android:text="Search By Department.." 
      android:textColor="@android:color/white" 
      android:textStyle="bold" 
      android:textSize="18sp" 
      android:layout_centerInParent="true"/> 
     </RelativeLayout> 
    </android.support.v7.widget.CardView> 

    <android.support.v7.widget.CardView 
     android:id="@+id/cardView2_mainActivity" 
     android:layout_width="match_parent" 
     android:layout_height="50dp" 
     android:layout_gravity="center" 
     android:layout_below="@id/cardView1_mainActivity" 
     card_view:cardCornerRadius="4dp" 
     android:layout_marginTop="20dp" 
     card_view:cardBackgroundColor="#e97c1d"> 

     <RelativeLayout 
      android:layout_width="match_parent" 
      android:layout_height="match_parent" 
      android:paddingLeft="10dp"> 
     <TextView 
      android:layout_width="wrap_content" 
      android:layout_height="wrap_content" 
      android:text="Search By Name.." 
      android:textColor="@android:color/white" 
      android:textStyle="bold" 
      android:textSize="18sp" 
      android:layout_centerInParent="true"/> 

     </RelativeLayout> 

    </android.support.v7.widget.CardView> 
    </RelativeLayout> 

    <RelativeLayout 
     android:layout_width="match_parent" 
     android:layout_height="0dp" 
     android:layout_gravity="center" 
     android:layout_weight="8.5"> 
    <ImageView 
     android:id="@+id/map_image" 
     android:layout_width="match_parent" 
     android:layout_height="match_parent" 
     android:src="@drawable/hry_map" 
     android:elevation="4dp" 
     android:layout_gravity="center"/> 
    </RelativeLayout> 

    <RelativeLayout 
     android:layout_below="@id/map_image" 
     android:layout_width="match_parent" 
     android:layout_height="0dp" 
     android:layout_weight="1" 
     android:paddingRight="16dp" 
     android:paddingLeft="16dp" 
     android:layout_marginTop="2dp" 
     android:gravity="center_horizontal" 
     android:layout_alignParentBottom="true"> 

     <android.support.v7.widget.CardView 
      android:id="@+id/disclaimer" 
      android:layout_width="150dp" 
      android:layout_height="30dp" 
      card_view:cardCornerRadius="4dp" 
      card_view:cardElevation="4dp" 
      android:layout_marginRight="8dp" 
      card_view:cardBackgroundColor="#424242"> 
      <TextView 
       android:layout_width="150dp" 
       android:layout_height="30dp" 
       android:text="Disclaimer" 
       android:gravity="center" 
       android:layout_gravity="center_vertical" 
       android:textColor="#FFFFFF" 
       android:textStyle="bold"/> 
     </android.support.v7.widget.CardView> 

     <android.support.v7.widget.CardView 
      android:id="@+id/feedback" 
      android:layout_toRightOf="@id/disclaimer" 
      android:layout_width="150dp" 
      android:layout_height="30dp" 
      card_view:cardCornerRadius="4dp" 
      card_view:cardElevation="4dp" 
      card_view:cardBackgroundColor="#424242"> 
      <TextView 
       android:layout_width="150dp" 
       android:layout_height="30dp" 
       android:text="Feedback" 
       android:gravity="center" 
       android:layout_gravity="center_vertical" 
       android:textColor="#FFFFFF" 
       android:textStyle="bold"/> 
     </android.support.v7.widget.CardView> 

    </RelativeLayout> 

</LinearLayout> 

SplashScreenActivity.java

0：後

は私のコードです

package com.example.android.telephonedirectory; 

import android.content.Intent; 
import android.content.pm.ActivityInfo; 
import android.content.res.Configuration; 
import android.os.Handler; 
import android.support.v7.app.AppCompatActivity; 
import android.os.Bundle; 
import android.widget.ProgressBar; 

import com.felipecsl.gifimageview.library.GifImageView; 

import org.apache.commons.io.IOUtils; 

import java.io.IOException; 
import java.io.InputStream; 

public class SplashScreenActivity extends AppCompatActivity { 
// private GifImageView gifimageview; 
    private ProgressBar progressBarSplashScreen; 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     if (getResources().getConfiguration().orientation == 
       Configuration.ORIENTATION_PORTRAIT) { 
      setContentView(R.layout.activity_splash_screen); 
     } else { 
      setContentView(R.layout.activity_splash_screen); 
     } 

//  gifimageview=(GifImageView)findViewById(R.id.gifSplashscreenImage); 
     progressBarSplashScreen=(ProgressBar)findViewById(R.id.progressbarSplashscreen); 
     progressBarSplashScreen.setVisibility(progressBarSplashScreen.VISIBLE); 

     //set GifImageView Resource 

     /*try { 
      InputStream inputStream=getAssets().open("splash_Screen.png"); 
      byte[] bytes= IOUtils.toByteArray(inputStream); 
      gifimageview.setBytes(bytes); 
      gifimageview.startAnimation(); 
     }catch (IOException ex){ 

     }*/ 

     //Wait for 4 seconds and start activity main 
     new Handler().postDelayed(new Runnable() { 
      @Override 
      public void run() { 
       SplashScreenActivity.this.startActivity(new Intent(SplashScreenActivity.this,MainActivity.class)); 
       SplashScreenActivity.this.finish(); 
      } 
     },2000); 
    } 

    public void onConfigurationChanged(Configuration newConfig) { 
     super.onConfigurationChanged(newConfig); 
     int orientation; 
     if (getResources().getConfiguration().orientation == 
       Configuration.ORIENTATION_PORTRAIT) { 
      orientation = ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE; 
      // or = ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE 
     }else { 
      orientation = ActivityInfo.SCREEN_ORIENTATION_REVERSE_PORTRAIT; 
     } 
     // Add code if needed 
//  listViewFiles.setAdapter(myFileListAdapter); 
//  myFileListAdapter.notifyDataSetChanged(); 
     setRequestedOrientation(orientation); 
    } 
} 

Answer 1

いけないあなたは、このための"singleTask"を使用する必要がありますandroid:launchMode="singleInstance"

起動モードを使用します。

singleInstanceは、アクティビティ用に別々のタスクスタックを作成し、現在のタスクスタック内のアクティビティをチェックしないためです。

"singleTask"アクティビティがタスクスタックに存在するかどうか毎回チェックすると、新しいタスクを作成できません。