런타임시 3D 파이 차트 세그먼트 값을 Android에서 변경하는 방법은 무엇입니까?

Question

나는 db 값을 기반으로 파이 차트를 만들고 슬라이더를 조정할 때 파이 차트를 변경해야합니다. 파이 차트를 만들고 슬라이더 조정 값을 받았습니다. 내 코드

PieChartDefalut.java 

    package com.exae.url; 

    import android.app.Activity; 
    import android.database.Cursor; 
    import android.database.sqlite.SQLiteDatabase; 
    import android.database.sqlite.SQLiteException; 
    import android.os.Bundle; 
    import android.util.Log; 
    import android.view.View; 
    import android.webkit.WebView; 
    import android.widget.AdapterView; 
    import android.widget.AdapterView.OnItemSelectedListener; 
    import android.widget.ArrayAdapter; 
    import android.widget.Button; 
    import android.widget.CheckBox; 
    import android.widget.ImageView; 
    import android.widget.LinearLayout; 
    import android.widget.SeekBar; 
    import android.widget.Spinner; 
    import android.widget.TextView; 
    import android.widget.Toast; 


    public class PieChartDefalut extends Activity implements SeekBar.OnSeekBarChangeListener, OnItemSelectedListener 
    { 
private final String SAMPLE_DB_NAME = "chartdb"; 
private final String SAMPLE_TABLE_NAME = "piechart3d"; 
    SQLiteDatabase sampleDB = null; 
    String year; 
    double value; 
    LinearLayout ll,ll1; 
    Spinner my_spinner; 

    ImageView pieChart; 
    View my_vew; 
    int count=0; 
    String value_arr[]={}; 
    static String[] my_year={}; 
    static int[] my_values={}; 
    static int my_values_length=0; 
    static int my_year_length=0; 
    String mUrl; 
    String label=""; 
private WebView googleChartView; 
static String urlGoogleChart = "http://chart.apis.google.com/chart?cht=p3&chs=300x150&"; 

static String[] urlyear; 
static int[] urlvalues; 
SeekBar mSeekBar; 
    TextView mProgressText; 
    Button bt; 
    int progress1=0; 
    int progress2=0; 
    Cursor c,c1; 
    int b; 
@Override 
public void onCreate(Bundle savedInstanceState) { 
super.onCreate(savedInstanceState); 
setContentView(R.layout.url); 
    mSeekBar = (SeekBar)findViewById(R.id.seek); 
    mSeekBar.setOnSeekBarChangeListener(this); 
    mProgressText = (TextView)findViewById(R.id.progress); 
bt = (Button)findViewById(R.id.ok); 
    ll=(LinearLayout)findViewById(R.id.my); 
    ll1=(LinearLayout)findViewById(R.id.my_linear); 
    my_spinner=(Spinner)findViewById(R.id.planets_spinner); 

try { 
    sampleDB = this.openOrCreateDatabase(SAMPLE_DB_NAME, MODE_PRIVATE, null); 

    sampleDB.execSQL("CREATE TABLE IF NOT EXISTS " + 
      SAMPLE_TABLE_NAME + 
      " (Year VARCHAR(5),Value DOUBLE(5));"); 
    sampleDB.execSQL("INSERT INTO " + SAMPLE_TABLE_NAME + " Values ('2001',5);"); 
    sampleDB.execSQL("INSERT INTO " + SAMPLE_TABLE_NAME + " Values ('2002',25);"); 
    sampleDB.execSQL("INSERT INTO " + SAMPLE_TABLE_NAME + " Values ('2003',15);"); 
    sampleDB.execSQL("INSERT INTO " + SAMPLE_TABLE_NAME + " Values ('2004',25);"); 
    sampleDB.execSQL("INSERT INTO " + SAMPLE_TABLE_NAME + " Values ('2005',25);"); 
    c = sampleDB.rawQuery("SELECT Year,Value FROM " + SAMPLE_TABLE_NAME , null); 

    final int Column1 = c.getColumnIndex("Year"); 
    final int Column2 = c.getColumnIndex("Value"); 
    if (c != null) { 
     if (c.moveToFirst()) { 
      do { 
       year = c.getString(Column1); 
       value = c.getDouble(Column2); 


       System.out.println(year); 
       System.out.println(value); 

      }while (c.moveToNext()); 

     } 
    } 

    int columncount=c.getCount(); 

    System.out.println("count------>"+columncount); 


     my_year = new String[columncount]; 

     if (c.moveToFirst()) 
     {      
      for (int i = 0; i < columncount; i++) 
      { 
       my_year[i] = c.getString(Column1); 
       System.out.println("database value-----"+i); 
       System.out.println(my_year[i]); 
       c.moveToNext(); 
      }   
     } 



     my_values = new int[columncount]; 

     if (c.moveToFirst()) 
     {      
      for (int j = 0; j < columncount; j++) 
      { 
       my_values[j] = c.getInt(Column2); 
       System.out.println("database value-----"+j); 
       System.out.println(my_values[j]); 
       c.moveToNext(); 
      }   
     } 


     my_year_length=my_year.length; 
     System.out.println("string length----->"+my_year_length); 

     for(int k=0;k<my_year_length;k++) 
     { 
      System.out.println("array stored values----------->"+my_year[k]); 
     } 


     my_values_length=my_values.length; 
     System.out.println("string length----->"+my_values_length); 

     for(int k1=0;k1<my_values_length;k1++) 
     { 
      System.out.println("array stored values----------->"+my_values[k1]); 
     } 


googleChartView = (WebView)findViewById(R.id.webView1); 


StringBuffer urlyear = new StringBuffer(); 

for(int i=0;i<my_year_length;i++) 
{ 
if(i == (my_year_length - 1)) 
urlyear.append(my_year[i]); 
else 
urlyear.append(my_year[i]+"|"); 
} 

StringBuffer urlvalues = new StringBuffer(); 

for(int j=0;j<my_values_length;j++) 
{ 
if(j == (my_values_length - 1)) 
urlvalues.append(my_values[j]); 
else 
urlvalues.append(my_values[j]+","); 
} 


mUrl = urlGoogleChart+"chl="+urlyear+"&chd=t:"+urlvalues; 
googleChartView.loadUrl(mUrl); 



ArrayAdapter<String> dataAdapter = new ArrayAdapter<String>(this,android.R.layout.simple_spinner_item,my_year); 

dataAdapter.setDropDownViewResource(android.R.layout.simple_spinner_item); 

my_spinner.setAdapter(dataAdapter); 

my_spinner.setOnItemSelectedListener(this); 
System.out.println("seek bar value----->"+progress1); 

bt.setOnClickListener(new View.OnClickListener() 
{ 
    public void onClick(View v) 
    { 
     if (c != null) 
     { 
       if (c.moveToFirst()) 
       { 
        do 
        {      
         year = c.getString(Column1); 

         System.out.println(year); 
         if(label.equalsIgnoreCase(year)) 
         { 
          Log.i("","values compared...."); 
          System.out.println("Lable.."+label); 
          System.out.println("year.."+year); 
          b=1; 

          } 

        }while (c.moveToNext()); 

       } 
      } 
    } 

}); 

} 
catch (SQLiteException se) 
{ 
    Log.e(getClass().getSimpleName(), "Could not create or Open the database"); 
} finally 
{ 
    if (sampleDB != null) 
     sampleDB.execSQL("DELETE FROM " + SAMPLE_TABLE_NAME); 
     sampleDB.close(); 
} 
} 


public void onProgressChanged(SeekBar seekBar, int progress, boolean fromTouch) 
{ 
    progress1=progress; 
     mProgressText.setText(progress + " " +getString(R.string.seekbar_from_touch) + "=" + fromTouch); 
    } 

    public void onStartTrackingTouch(SeekBar seekBar) 
    { 

    } 

    public void onStopTrackingTouch(SeekBar seekBar) 
    { 

     progress2=progress1; 
     System.out.println("seek bar value---->"+progress2); 
     // upDate(); 
     sampleDB.execSQL("UPDATE "+SAMPLE_TABLE_NAME+ "SET Value= "+ progress2+ "WHERE Year="+label,null); 



    } 


public void onItemSelected(AdapterView<?> arg0, View arg1, int arg2, 
     long arg3) { 

    label = arg0.getItemAtPosition(arg2).toString(); 
    System.out.println("selected values--->"+label); 


// Toast.makeText(arg0.getContext(), "You selected: " + label,Toast.LENGTH_LONG).show(); 
} 


public void onNothingSelected(AdapterView<?> arg0) 
{ 


} 
public void upDate() 
{ 
    if(b==1&&progress2>0) 
    { 
     b=0; 

     sampleDB.execSQL("UPDATE "+SAMPLE_TABLE_NAME+ "SET Value= "+ progress2+ "WHERE Year="+label,null); 
     Log.i("","database updated"); 
    } 
} 


} 

지금 내 문제는 내가 스피너 조절 슬라이더 값에서 선택 년으로 데이터베이스를 업데이트 할 것입니다이다. 그렇지 않으면 내가 선택한 특정 연도와 조정 가능한 가치에 따라 원형 차트를 변경해야합니다. 그것은 약간의 오류를 보여줍니다.

 09-24 13:06:14.245: ERROR/AndroidRuntime(1907): FATAL EXCEPTION: main 
    09-24 13:06:14.245: ERROR/AndroidRuntime(1907): java.lang.IllegalArgumentException: Empty bindArgs 
    09-24 13:06:14.245: ERROR/AndroidRuntime(1907):  at android.database.sqlite.SQLiteDatabase.execSQL(SQLiteDatabase.java:1793) 
    09-24 13:06:14.245: ERROR/AndroidRuntime(1907):  at com.exae.url.PieChartDefalut.onStopTrackingTouch(PieChartDefalut.java:283) 
    09-24 13:06:14.245: ERROR/AndroidRuntime(1907):  at android.widget.SeekBar.onStopTrackingTouch(SeekBar.java:115) 
    09-24 13:06:14.245: ERROR/AndroidRuntime(1907):  at android.widget.AbsSeekBar.onTouchEvent(AbsSeekBar.java:302) 
    09-24 13:06:14.245: ERROR/AndroidRuntime(1907):  at android.view.View.dispatchTouchEvent(View.java:3885) 
    09-24 13:06:14.245: ERROR/AndroidRuntime(1907):  at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:942) 
    09-24 13:06:14.245: ERROR/AndroidRuntime(1907):  at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:942) 
    09-24 13:06:14.245: ERROR/AndroidRuntime(1907):  at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:942) 
    09-24 13:06:14.245: ERROR/AndroidRuntime(1907):  at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:942) 
    09-24 13:06:14.245: ERROR/AndroidRuntime(1907):  at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:942) 
    09-24 13:06:14.245: ERROR/AndroidRuntime(1907):  at com.android.internal.policy.impl.PhoneWindow$DecorView.superDispatchTouchEvent(PhoneWindow.java:1691) 
    09-24 13:06:14.245: ERROR/AndroidRuntime(1907):  at com.android.internal.policy.impl.PhoneWindow.superDispatchTouchEvent(PhoneWindow.java:1125) 
    09-24 13:06:14.245: ERROR/AndroidRuntime(1907):  at android.app.Activity.dispatchTouchEvent(Activity.java:2096) 
    09-24 13:06:14.245: ERROR/AndroidRuntime(1907):  at com.android.internal.policy.impl.PhoneWindow$DecorView.dispatchTouchEvent(PhoneWindow.java:1675) 
    09-24 13:06:14.245: ERROR/AndroidRuntime(1907):  at android.view.ViewRoot.deliverPointerEvent(ViewRoot.java:2194) 
    09-24 13:06:14.245: ERROR/AndroidRuntime(1907):  at android.view.ViewRoot.handleMessage(ViewRoot.java:1878) 
    09-24 13:06:14.245: ERROR/AndroidRuntime(1907):  at android.os.Handler.dispatchMessage(Handler.java:99) 
    09-24 13:06:14.245: ERROR/AndroidRuntime(1907):  at android.os.Looper.loop(Looper.java:123) 
    09-24 13:06:14.245: ERROR/AndroidRuntime(1907):  at android.app.ActivityThread.main(ActivityThread.java:3683) 
    09-24 13:06:14.245: ERROR/AndroidRuntime(1907):  at java.lang.reflect.Method.invokeNative(Native Method) 
    09-24 13:06:14.245: ERROR/AndroidRuntime(1907):  at java.lang.reflect.Method.invoke(Method.java:507) 
    09-24 13:06:14.245: ERROR/AndroidRuntime(1907):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839) 
    09-24 13:06:14.245: ERROR/AndroidRuntime(1907):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597) 

이 문제를 어떻게 해결할 수 있습니까? 어떤 몸이라도 나를 도울 수 있습니까? 미리 감사드립니다.

Answer 1

execSQL(String sql, Object[] bindArgs)의 두 번째 인수가 null이라는 오류가 발생합니다.

public void onStopTrackingTouch(SeekBar seekBar) { 
    progress2=progress1; 
    System.out.println("seek bar value---->"+progress2); 
    sampleDB.execSQL("UPDATE "+SAMPLE_TABLE_NAME+ "SET Value= "+ progress2+ "WHERE Year="+label, null); 
} 

대신 execSQL(String sql)을 사용할 수 있습니다.

public void onStopTrackingTouch(SeekBar seekBar) { 
    progress2=progress1; 
    System.out.println("seek bar value---->"+progress2); 
    sampleDB.execSQL("UPDATE "+SAMPLE_TABLE_NAME+ "SET Value= "+ progress2+ "WHERE Year="+label); 
}