AChartEngine以下に示すように、ライブラリを使用した棒グラフがあります::
public class MainActivity extends Activity {
private String[] mMonth = new String[] {
"Jan", "Feb" , "Mar", "Apr", "May", "Jun",
"Jul", "Aug" , "Sep", "Oct", "Nov", "Dec"
};
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// Getting reference to the button btn_chart
Button btnChart = (Button) findViewById(R.id.btn_chart);
// Defining click event listener for the button btn_chart
OnClickListener clickListener = new OnClickListener() {
@Override
public void onClick(View v) {
// Draw the Income vs Expense Chart
openChart();
}
};
// Setting event click listener for the button btn_chart of the MainActivity layout
btnChart.setOnClickListener(clickListener);
}
private void openChart(){
int[] x = { 0,1,2,3,4,5,6,7 };
int[] income = { 2000,2500,2700,3000,2800,3500,3700,3800};
int[] expense = {2200, 2700, 2900, 2800, 2600, 3000, 3300, 3400 };
// Creating an XYSeries for Income
//CategorySeries incomeSeries = new CategorySeries("Income");
XYSeries incomeSeries = new XYSeries("Income");
// Creating an XYSeries for Income
XYSeries expenseSeries = new XYSeries("Expense");
// Adding data to Income and Expense Series
for(int i=0;i<x.length;i++){
incomeSeries.add(i,income[i]);
expenseSeries.add(i,expense[i]);
}
// Creating a dataset to hold each series
XYMultipleSeriesDataset dataset = new XYMultipleSeriesDataset();
// Adding Income Series to the dataset
dataset.addSeries(incomeSeries);
// Adding Expense Series to dataset
dataset.addSeries(expenseSeries);
// Creating XYSeriesRenderer to customize incomeSeries
XYSeriesRenderer incomeRenderer = new XYSeriesRenderer();
incomeRenderer.setColor(Color.rgb(130, 130, 230));
incomeRenderer.setFillPoints(true);
incomeRenderer.setLineWidth(2);
incomeRenderer.setDisplayChartValues(true);
// Creating XYSeriesRenderer to customize expenseSeries
XYSeriesRenderer expenseRenderer = new XYSeriesRenderer();
expenseRenderer.setColor(Color.rgb(220, 80, 80));
expenseRenderer.setFillPoints(true);
expenseRenderer.setLineWidth(2);
expenseRenderer.setDisplayChartValues(true);
Calendar cal = Calendar.getInstance();
cal.clear(Calendar.HOUR);
// Creating a XYMultipleSeriesRenderer to customize the whole chart
XYMultipleSeriesRenderer multiRenderer = new XYMultipleSeriesRenderer();
multiRenderer.setXLabels(0);
multiRenderer.setChartTitle("Income vs Expense Chart");
multiRenderer.setXTitle("Year 2012");
multiRenderer.setYTitle("Amount in Dollars");
multiRenderer.setZoomButtonsVisible(true);
for(int i=0; i< x.length;i++){
multiRenderer.addXTextLabel(i, mMonth[i]);
}
// Adding incomeRenderer and expenseRenderer to multipleRenderer
// Note: The order of adding dataseries to dataset and renderers to multipleRenderer
// should be same
multiRenderer.addSeriesRenderer(incomeRenderer);
multiRenderer.addSeriesRenderer(expenseRenderer);
// Creating an intent to plot bar chart using dataset and multipleRenderer
Intent intent = ChartFactory.getBarChartIntent(getBaseContext(), dataset, multiRenderer, Type.DEFAULT);
// Start Activity
startActivity(intent);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.activity_main, menu);
return true;
}
}
上記のコード グラフは次のようになります。
しかし、次のプロパティでグラフを描く必要があります:
- X 軸は現在の時刻を表示する必要があります。下のグラフに示すように、時刻は午前 2 時を超える場所です。
- X 軸の各バーは 5 分バーです
- 5分ごとに、値に基づいてバーを描画する必要があるデータを送信します。
- 今のところ Y 軸パラメータを無視して、必要な X-aix をプロットする方法が必要です
グラフは次のようになります。
