GraphView에서 그래프를 가져 오지 마십시오

Question

Android Studio 코드에서 GraphView를 구현했지만 그래픽이 내 앱에 표시되지 않습니다. 읽기 버튼을 누르면 아무 일도 일어나지 않습니다. 그래서 내가 뭘해야하지? 귀하의 시간과 당신의 답변에 감사드립니다.

package yourhome; 

import android.os.Bundle; 
import android.support.design.widget.FloatingActionButton; 
import android.support.design.widget.Snackbar; 
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.View; 
import android.view.Menu; 
import android.view.MenuItem; 
import android.widget.AdapterView; 
import android.widget.ArrayAdapter; 
import android.widget.Button; 
import android.widget.ListView; 
import android.widget.TextView; 
import android.widget.Toast; 


import com.jjoe64.graphview.GraphView; 
import com.jjoe64.graphview.Viewport; 
import com.jjoe64.graphview.series.DataPoint; 
import com.jjoe64.graphview.series.LineGraphSeries; 


import java.util.Random; 

import yourhome.datasource.ActivityDataSource; 

import static java.lang.Thread.sleep; 

public class Hauptfenster extends AppCompatActivity { 
    private ListView mDrawerList; 
    private ArrayAdapter<String> mAdapter; 
    private ActionBarDrawerToggle mDrawerToggle; 
    private DrawerLayout mDrawerLayout; 
    private String mActivityTitle; 

    private static final Random RANDOM = new Random(); 
    private LineGraphSeries<DataPoint> series; 
    private int lastX = 0; 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 

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

     mDrawerList = (ListView) findViewById(R.id.navList); 
     mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout); 
     mActivityTitle = getTitle().toString(); 

     addDrawerItems(); 
     setupDrawer(); 

     getSupportActionBar().setDisplayHomeAsUpEnabled(true); 
     getSupportActionBar().setHomeButtonEnabled(true); 
     //GraphView initialiesieren 
     GraphView graph = (GraphView) findViewById(R.id.graph); 
     //Daten 
     series = new LineGraphSeries<DataPoint>(); 
     graph.addSeries(series); 
     //Options 

     Viewport viewport = graph.getViewport(); 
     viewport.setYAxisBoundsManual(true); 
     viewport.setMinY(1); 
     viewport.setMaxY(30); 
     viewport.setScrollable(true); 


     final TextView textView = (TextView) findViewById(R.id.textView); 

     Button lesenBtn = (Button) findViewById(R.id.lesenBtn); 
     lesenBtn.setOnClickListener(new View.OnClickListener() { 
      @Override 
      public void onClick(View v) { 
       new ActivityDataSource(textView).execute("someParams"); 


      } 
     }); 
    } 

    @Override 
    protected void onResume() { 
     super.onResume(); 
     new Thread(new Runnable() { 
      @Override 
      public void run() { 
       for (int i = 0; i < 100; i++) { 
        runOnUiThread(new Runnable() { 
         @Override 
         public void run() { 
          addEntry(); 
         } 
        }); 
        try { 
         Thread.sleep(600); 

        } catch (InterruptedException e) { 

        } 
       } 
      } 
     }).start(); 
    } 

    private void addEntry() { 
     series.appendData(new DataPoint(lastX++, RANDOM.nextDouble() * 10d), true, 10); 
    } 



    private void addDrawerItems() { 
     String[] osArray = { "Kamera", "LED", "Steckdosen" }; 
     mAdapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, osArray); 
     mDrawerList.setAdapter(mAdapter); 

     mDrawerList.setOnItemClickListener(new AdapterView.OnItemClickListener() { 
      @Override 
      public void onItemClick(AdapterView<?> parent, View view, int position, long id) { 
       Toast.makeText(Hauptfenster.this, "Coming Soon!", Toast.LENGTH_SHORT).show(); 
      } 
     }); 
    } 

    private void setupDrawer() { 
     mDrawerToggle = new ActionBarDrawerToggle(this, mDrawerLayout, R.string.drawer_open, R.string.drawer_close) { 

      /** Called when a drawer has settled in a completely open state. */ 
      public void onDrawerOpened(View drawerView) { 
       super.onDrawerOpened(drawerView); 
       getSupportActionBar().setTitle("Was möchten sie einsehen ?"); 
       invalidateOptionsMenu(); // creates call to onPrepareOptionsMenu() 
      } 

      /** Called when a drawer has settled in a completely closed state. */ 
      public void onDrawerClosed(View view) { 
       super.onDrawerClosed(view); 
       getSupportActionBar().setTitle(mActivityTitle); 
       invalidateOptionsMenu(); // creates call to onPrepareOptionsMenu() 
      } 
     }; 

     mDrawerToggle.setDrawerIndicatorEnabled(true); 
     mDrawerLayout.setDrawerListener(mDrawerToggle); 
    } 

    @Override 
    public boolean onCreateOptionsMenu(Menu menu) { 
     getMenuInflater().inflate(R.menu.menu_hauptfenster, menu); 
     return true; 
    } 

    @Override 
    public boolean onOptionsItemSelected(MenuItem item) { 
     int id = item.getItemId(); 
     if (id == R.id.action_settings) { return true;} 
     return super.onOptionsItemSelected(item); 


     } 
    } 

Answer 1

라인 :

series = new LineGraphSeries<DataPoint>(); 

에 데이터가 없습니다. 값이 정수 값의 배열 될 수있다

series = new LineGraphSeries<DataPoint>(values); 

: 당신은 뭔가를해야합니다.