私の単純なAndroidアプリはビルドして電話機にインストールしますが、何かしようとするとクラッシュします

Question

私は次の操作方法を持つアプリを書いています：人は1つのテキストボックスに1つの文字列を入力し、別のテキストボックス（これらの2つの文字列はメソッドGetDirectionsに渡されます）は、 "GO"ボタンを押して、アプリケーションはGetDirectionsによって提供される文字列のリストを表示します。あなたは本当に最初の方法の下で何かを考慮する必要はありません、私は信じています。 GetDirectionsは単にArrayListを返します。

はここに私のコードです：

import android.os.Bundle; 
import android.support.design.widget.FloatingActionButton; 
import android.support.design.widget.Snackbar; 
import android.support.v7.app.AppCompatActivity; 
import android.support.v7.widget.Toolbar; 
import android.view.View; 
import java.util.List; 
import java.util.Scanner; 
import java.util.StringTokenizer; 
import java.util.ArrayList; 
import java.util.Iterator; 
import java.util.HashMap; 
import android.content.Intent; 
import android.support.v7.app.AppCompatActivity; 
import android.os.Bundle; 
import android.view.View; 
import android.widget.EditText; 
import android.widget.ListView; 
import android.widget.ArrayAdapter; 
import android.widget.Button; 
import java.util.List; 
import org.jgrapht.*; 
import org.jgrapht.graph.*; 
import org.jgrapht.alg.DijkstraShortestPath; 


public class MainActivity extends AppCompatActivity { 

ArrayList<String> DirectionsList = new ArrayList<String>(); 

@Override 

protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_main); 





    EditText text1 = (EditText)findViewById(R.id.Start); 
    final String startLoc = text1.getText().toString(); 
    EditText text2 = (EditText)findViewById(R.id.End); 
    final String endLoc = text2.getText().toString(); 
    final Button but1 = (Button)findViewById(R.id.button); 
    but1.setOnClickListener(new View.OnClickListener() { 
     public void onClick(View v) { 
     DirectionsList = getDirections(startLoc, endLoc); 
      ListView dir1 = (ListView)findViewById(R.id.Directions); 
      ArrayAdapter listAdapter = new ArrayAdapter<String> 
(MainActivity.this, android.R.layout.simple_list_item_1, DirectionsList); 
      dir1.setAdapter(listAdapter); 
     } 


    }); 


    } 
public ArrayList getDirections(String string, String string2) 
{ 
    final DirectedWeightedMultigraph<String, DefaultWeightedEdge> map = new 
DirectedWeightedMultigraph<String, DefaultWeightedEdge> 
(DefaultWeightedEdge.class); 







    String vertexList = "A1S1 A110 A111 A130 A1S2 A114 A113 A1H1 A1COPIER A116 A117A A117B A103 A102 A101 A1H2 A120 A121 A122 ENGLISH SOCSTUD A1S3 A1S4 A1HA"; 
    StringTokenizer TSS = new StringTokenizer(vertexList); 
    while(TSS.hasMoreTokens()) { map.addVertex(TSS.nextToken()); } 
    DefaultWeightedEdge A1S1toA1H1 = map.addEdge("A1S1", "A1H1"); 
    DefaultWeightedEdge A1H1toA1S1 = map.addEdge("A1H1", "A1S1"); 
    map.setEdgeWeight(A1S1toA1H1, 1); 
    map.setEdgeWeight(A1H1toA1S1, 1); 
    DefaultWeightedEdge A1S1toA1H2 = map.addEdge("A1S1", "A1H2"); 
    DefaultWeightedEdge A1H2toA1S1 = map.addEdge("A1H2", "A1S1"); 
    map.setEdgeWeight(A1S1toA1H2, 1); 
    map.setEdgeWeight(A1H2toA1S1, 1); 
    DefaultWeightedEdge A1S1toCOPIER = map.addEdge("A1S1", "A1COPIER"); 
    DefaultWeightedEdge COPIERtoA1S1 = map.addEdge("A1COPIER", "A1S1"); 
    map.setEdgeWeight(A1S1toCOPIER, 10); 
    map.setEdgeWeight(COPIERtoA1S1, 10); 
    DefaultWeightedEdge A1H1toA110 = map.addEdge("A1H1", "A110"); 
    DefaultWeightedEdge A110toA1H1 = map.addEdge("A110", "A1H1"); 
    map.setEdgeWeight(A1H1toA110, 10); 
    map.setEdgeWeight(A110toA1H1, 10); 
    DefaultWeightedEdge A1H1toA111 = map.addEdge("A1H1", "A111"); 
    DefaultWeightedEdge A111toA1H1 = map.addEdge("A111", "A1H1"); 
    map.setEdgeWeight(A1H1toA111, 10); 
    map.setEdgeWeight(A111toA1H1, 10); 
    DefaultWeightedEdge A1H1toA130 = map.addEdge("A1H1", "A130"); 
    DefaultWeightedEdge A130toA1H1 = map.addEdge("A130", "A1H1"); 
    map.setEdgeWeight(A1H1toA130, 10); 
    map.setEdgeWeight(A130toA1H1, 10); 
    DefaultWeightedEdge A1H1toA114 = map.addEdge("A1H1", "A114"); 
    DefaultWeightedEdge A114toA1H1 = map.addEdge("A114", "A1H1"); 
    map.setEdgeWeight(A1H1toA114, 10); 
    map.setEdgeWeight(A114toA1H1, 10); 
    DefaultWeightedEdge A1H1toA113 = map.addEdge("A1H1", "A113"); 
    DefaultWeightedEdge A113toA1H1 = map.addEdge("A113", "A1H1"); 
    map.setEdgeWeight(A1H1toA113, 10); 
    map.setEdgeWeight(A113toA1H1, 10); 
    DefaultWeightedEdge A1H1toA1S2 = map.addEdge("A1H1", "A1S2"); 
    DefaultWeightedEdge A1S2toA1H1 = map.addEdge("A1S2", "A1H1"); 
    map.setEdgeWeight(A1H1toA1S2, 1); 
    map.setEdgeWeight(A1S2toA1H1, 1); 
    DefaultWeightedEdge A1S2toA110 = map.addEdge("A1S2", "A110"); 
    DefaultWeightedEdge A110toA1S2 = map.addEdge("A110", "A1S2"); 
    map.setEdgeWeight(A1S2toA110, 10); 
    map.setEdgeWeight(A110toA1S2, 10); 
    DefaultWeightedEdge A1S2toA111 = map.addEdge("A1S2", "A111"); 
    DefaultWeightedEdge A111toA1S2 = map.addEdge("A111", "A1S2"); 
    map.setEdgeWeight(A1S2toA111, 10); 
    map.setEdgeWeight(A111toA1S2, 10); 
    DefaultWeightedEdge A1S2toA130 = map.addEdge("A1S2", "A130"); 
    DefaultWeightedEdge A130toA1S2 = map.addEdge("A130", "A1S2"); 
    map.setEdgeWeight(A1S2toA130, 10); 
    map.setEdgeWeight(A130toA1S2, 10); 
    DefaultWeightedEdge A1S2toA114 = map.addEdge("A1S2", "A114"); 
    DefaultWeightedEdge A114toA1S2 = map.addEdge("A114", "A1S2"); 
    map.setEdgeWeight(A1S2toA114, 10); 
    map.setEdgeWeight(A114toA1S2, 10); 
    DefaultWeightedEdge A1S2toA113 = map.addEdge("A1S2", "A113"); 
    DefaultWeightedEdge A113toA1S2 = map.addEdge("A113", "A1S2"); 
    map.setEdgeWeight(A1S2toA113, 10); 
    map.setEdgeWeight(A113toA1S2, 10); 
    DefaultWeightedEdge A1H1toA1HA = map.addEdge("A1H1", "A1HA"); 
    DefaultWeightedEdge A1HAtoA1H1 = map.addEdge("A1HA", "A1H1"); 
    map.setEdgeWeight(A1H1toA1HA, 10); 
    map.setEdgeWeight(A1HAtoA1H1, 10); 
    DefaultWeightedEdge A1H2toA1HA = map.addEdge("A1H2", "A1HA"); 
    DefaultWeightedEdge A1HAtoA1H2 = map.addEdge("A1HA", "A1H2"); 
    map.setEdgeWeight(A1H2toA1HA, 10); 
    map.setEdgeWeight(A1HAtoA1H2, 10); 
    DefaultWeightedEdge A1HAtoA116 = map.addEdge("A1HA", "A116"); 
    DefaultWeightedEdge A116toA1HA = map.addEdge("A116", "A1HA"); 
    map.setEdgeWeight(A1HAtoA116, 1); 
    map.setEdgeWeight(A116toA1HA, 1); 
    DefaultWeightedEdge A1HAtoA177A = map.addEdge("A1HA", "A117A"); 
    DefaultWeightedEdge A177AtoA1HA = map.addEdge("A117A", "A1HA"); 
    map.setEdgeWeight(A1HAtoA177A, 1); 
    map.setEdgeWeight(A177AtoA1HA, 1); 
    DefaultWeightedEdge A117AtoA117B = map.addEdge("A117A", "A117B"); 
    DefaultWeightedEdge A117BtoA117A = map.addEdge("A117B", "A117A"); 
    map.setEdgeWeight(A117AtoA117B, 1); 
    map.setEdgeWeight(A117BtoA117A, 1); 
    DefaultWeightedEdge A1H2toA103 = map.addEdge("A1H2", "A103"); 
    DefaultWeightedEdge A103toA1H2 = map.addEdge("A103", "A1H2"); 
    map.setEdgeWeight(A1H2toA103, 10); 
    map.setEdgeWeight(A103toA1H2, 10); 
    DefaultWeightedEdge A1H2toA102 = map.addEdge("A1H2", "A102"); 
    DefaultWeightedEdge A102toA1H2 = map.addEdge("A102", "A1H2"); 
    map.setEdgeWeight(A1H2toA102, 10); 
    map.setEdgeWeight(A102toA1H2, 10); 
    DefaultWeightedEdge A1H2toA101 = map.addEdge("A1H2", "A101"); 
    DefaultWeightedEdge A101toA1H2 = map.addEdge("A101", "A1H2"); 
    map.setEdgeWeight(A1H2toA101, 10); 
    map.setEdgeWeight(A101toA1H2, 10); 
    DefaultWeightedEdge A1S3toA103 = map.addEdge("A1S3", "A103"); 
    DefaultWeightedEdge A103toA1S3 = map.addEdge("A103", "A1S3"); 
    map.setEdgeWeight(A1S3toA103, 10); 
    map.setEdgeWeight(A103toA1S3, 10); 
    DefaultWeightedEdge A1S3toA102 = map.addEdge("A1S3", "A102"); 
    DefaultWeightedEdge A102toA1S3 = map.addEdge("A102", "A1S3"); 
    map.setEdgeWeight(A1S3toA102, 10); 
    map.setEdgeWeight(A102toA1S3, 10); 
    DefaultWeightedEdge A1S3toA101 = map.addEdge("A1S3", "A101"); 
    DefaultWeightedEdge A101toA1S3 = map.addEdge("A101", "A1S3"); 
    map.setEdgeWeight(A1S3toA101, 10); 
    map.setEdgeWeight(A101toA1S3, 10); 
    DefaultWeightedEdge A1H2toA1S4 = map.addEdge("A1H2", "A1S4"); 
    DefaultWeightedEdge A1S4toA1H2 = map.addEdge("A1S4", "A1H2"); 
    map.setEdgeWeight(A1H2toA1S4, 1); 
    map.setEdgeWeight(A1S4toA1H2, 1); 
    DefaultWeightedEdge A1H2toA120 = map.addEdge("A1H2", "A120"); 
    DefaultWeightedEdge A120toA1H2 = map.addEdge("A120", "A1H2"); 
    map.setEdgeWeight(A1H2toA120, 10); 
    map.setEdgeWeight(A120toA1H2, 10); 
    DefaultWeightedEdge A1H2toA121 = map.addEdge("A1H2", "A121"); 
    DefaultWeightedEdge A121toA1H2 = map.addEdge("A121", "A1H2"); 
    map.setEdgeWeight(A1H2toA121, 10); 
    map.setEdgeWeight(A121toA1H2, 10); 
    DefaultWeightedEdge A1H2toA122 = map.addEdge("A1H2", "A122"); 
    DefaultWeightedEdge A122toA1H2 = map.addEdge("A122", "A1H2"); 
    map.setEdgeWeight(A1H2toA122, 10); 
    map.setEdgeWeight(A122toA1H2, 10); 
    DefaultWeightedEdge A1H2toENGLISH = map.addEdge("A1H2", "ENGLISH"); 
    DefaultWeightedEdge ENGLISHtoA1H2 = map.addEdge("ENGLISH", "A1H2"); 
    map.setEdgeWeight(A1H2toENGLISH, 10); 
    map.setEdgeWeight(ENGLISHtoA1H2, 10); 
    DefaultWeightedEdge A1H2toSOCSTUD = map.addEdge("A1H2", "SOCSTUD"); 
    DefaultWeightedEdge SOCSTUDtoA1H2 = map.addEdge("SOCSTUD", "A1H2"); 
    map.setEdgeWeight(A1H2toSOCSTUD, 10); 
    map.setEdgeWeight(SOCSTUDtoA1H2, 10); 
    DefaultWeightedEdge A1S4toA120 = map.addEdge("A1S4", "A120"); 
    DefaultWeightedEdge A120toA1S4 = map.addEdge("A120", "A1S4"); 
    map.setEdgeWeight(A1S4toA120, 10); 
    map.setEdgeWeight(A120toA1S4, 10); 
    DefaultWeightedEdge A1S4toA121 = map.addEdge("A1S4", "A121"); 
    DefaultWeightedEdge A121toA1S4 = map.addEdge("A121", "A1S4"); 
    map.setEdgeWeight(A1S4toA121, 10); 
    map.setEdgeWeight(A121toA1S4, 10); 
    DefaultWeightedEdge A1S4toA122 = map.addEdge("A1S4", "A122"); 
    DefaultWeightedEdge A122toA1S4 = map.addEdge("A122", "A1S4"); 
    map.setEdgeWeight(A1S4toA122, 10); 
    map.setEdgeWeight(A122toA1S4, 10); 
    DefaultWeightedEdge A1S4toENGLISH = map.addEdge("A1S4", "ENGLISH"); 
    DefaultWeightedEdge ENGLISHtoA1S4 = map.addEdge("ENGLISH", "A1S4"); 
    map.setEdgeWeight(A1S4toENGLISH, 10); 
    map.setEdgeWeight(ENGLISHtoA1S4, 10); 
    DefaultWeightedEdge A1S4toSOCSTUD = map.addEdge("A1S4", "SOCSTUD"); 
    DefaultWeightedEdge SOCSTUDtoA1S4 = map.addEdge("SOCSTUD", "A1S4"); 
    map.setEdgeWeight(A1S4toSOCSTUD, 10); 
    map.setEdgeWeight(SOCSTUDtoA1S4, 10); 
    DefaultWeightedEdge A1S3toCOPIER = map.addEdge("A1S3", "A1COPIER"); 
    DefaultWeightedEdge COPIERtoA1S3 = map.addEdge("A1COPIER", "A1S3"); 
    map.setEdgeWeight(A1S3toCOPIER, 10); 
    map.setEdgeWeight(COPIERtoA1S3, 10); 
    DefaultWeightedEdge A1LtoR = map.addEdge("A1H1", "A1H2"); 
    DefaultWeightedEdge A1RtoL = map.addEdge("A1H2", "A1H1"); 
    map.setEdgeWeight(A1LtoR, 1); 
    map.setEdgeWeight(A1RtoL, 1); 






    List shortest_path = (List) DijkstraShortestPath.findPathBetween(map, 
string, string2); 
    DijkstraShortestPath<String, DefaultWeightedEdge>shortest = 
      new DijkstraShortestPath<String, DefaultWeightedEdge>(map, 
string, string2); 

    String robustString = clearSpecChars(shortest_path.toString()); 
    // System.out.println(robustString); 
    StringTokenizer st = new StringTokenizer(robustString); 


    ArrayList connectorList = new ArrayList(); 
    while (st.hasMoreTokens()) { 
     connectorList.add(st.nextToken()); 
    } 
    int i = 0; 
    String Rstring2 = ""; 
    while(!connectorList.isEmpty()) 
    { 
     Rstring2 = Rstring2.concat(connectorList.get(0).toString()); 
     i++; 
     if(i == 2) 
     { 
      i = 0; 
      Rstring2 = Rstring2.concat(" "); 
     } 
     connectorList.remove(0); 
    } 
    // System.out.println(Rstring2); 
    //String RString = clearDupes(connectorList).toString(); 
    //RString = clearSpecChars(RString);*/ 
    StringTokenizer tokenizeRstring2 = new StringTokenizer(Rstring2); 
    connectorList.clear(); 
    while (tokenizeRstring2.hasMoreTokens()) { 
     connectorList.add(tokenizeRstring2.nextToken()); 
    } 
    HashMap instructions = new HashMap<String, String>(); 
    instructions.put("A110A1H1", "Go into the hallway."); 
    instructions.put("A1H1A1H2", "Go down the hallway."); 
    instructions.put("A1H2A102", "Turn left and go down the hall. A102 will 
be on your left."); 
    ArrayList<String> DirectionsList = new ArrayList<String>(); 
    String dataAll; 

    for(int j = 0; j < connectorList.size(); j++){ 
     DirectionsList.add((String) 
    instructions.get(connectorList.get(0).toString())); 
     connectorList.remove(0); 
    } 
    String[] DirectionsArray = (String[]) DirectionsList.toArray(); 
    return DirectionsList; 


} 
public static String clearSpecChars (String robustString) 
{ 
    robustString = robustString.replaceAll("[(]", ""); 
    robustString = robustString.replaceAll("[)]", ""); 
    robustString = robustString.replaceAll("[:]", ""); 
    robustString = robustString.replaceAll("[,]", ""); 
    robustString = robustString.substring(0, robustString.length()-1); 
    robustString = robustString.substring(1, robustString.length()); 

    return robustString; 
} 

}

Answer 1

私は問題がシンプルだと思う、あなたはボタンが押された後、テキストを読む必要がある、あなたは初期化ブロック内の値を読んでいます。クリックリスナーコード内のコードを移動します。

final String startLoc = text1.getText().toString(); 
final String endLoc = text2.getText().toString(); 
DirectionsList = getDirections(startLoc, endLoc); 
      ListView dir1 = (ListView)findViewById(R.id.Directions); 
      ArrayAdapter listAdapter = new ArrayAdapter<String> 
(MainActivity.this, android.R.layout.simple_list_item_1, DirectionsList); 
      dir1.setAdapter(listAdapter); 
     }