我使用 achartengine 图表库创建了一个 BAR GRAPH，并尝试将此条形图保存为 .jpg 图像。条形图已成功显示在文本视图上，但是当我保存此条形图时，仅保存第一次显示文本视图时可见的条形图部分。我想将整个视图保存为图像，包括由于滚动而遗漏的部分。
代码：
public class MainActivity extends Activity {
String[] firstData1={"IDLE","IDLE","DCH","DCH","FACH"};
int[] firstData=new int[firstData1.length];
String[] m={"IDLE","FACH","DCH"};
public GraphicalView createIntent()
{
int[] x={0,1,2,3,4};
double[] time={1361292289.238427,1361292289.240838,1361292289.430260,1361292289.596886,1361292290.002587};
String time1[]=new String[time.length];
for(int i=0;i<firstData1.length;i++)
{
if(firstData1[i]=="IDLE")
firstData1[i]="0";
else if(firstData1[i]=="FACH")
firstData1[i]="1";
else
firstData1[i]="2";
}
firstData=new int[firstData1.length];
for(int i=0;i<firstData1.length;i++)
{
firstData[i]=Integer.parseInt(firstData1[i]);
}
XYSeries stateSeries = new XYSeries("Device State");
for(int i=0;i<x.length;i++){
stateSeries.add(i,firstData[i]);
}
XYMultipleSeriesDataset dataset = new XYMultipleSeriesDataset();
dataset.addSeries(stateSeries);
XYSeriesRenderer stateRenderer = new XYSeriesRenderer();
stateRenderer.setColor(Color.rgb(0, 250, 154));
stateRenderer.setDisplayChartValues(true);
XYMultipleSeriesRenderer multiRenderer = new XYMultipleSeriesRenderer();
multiRenderer.setAxisTitleTextSize(16);
multiRenderer.setChartTitleTextSize(20);
multiRenderer.setLabelsTextSize(10);
multiRenderer.setLegendTextSize(10);
multiRenderer.setBarSpacing(0.5);
multiRenderer.setXLabelsAlign(Align.LEFT);
multiRenderer.setLabelsColor(Color.BLACK);
multiRenderer.setOrientation(Orientation.HORIZONTAL);
multiRenderer.setYLabels(0);
multiRenderer.setMarginsColor(Color.parseColor("#EEEDED"));
multiRenderer.setXLabelsColor(Color.BLACK);
multiRenderer.setYLabelsColor(0,Color.BLACK);
multiRenderer.setMargins(new int[] { 50, 45, 40, 40 });
multiRenderer.setApplyBackgroundColor(true);
multiRenderer.setBackgroundColor(Color.parseColor("#FBFBFC"));
multiRenderer.setXLabels(0);
multiRenderer.setChartTitle("Device State Chart");
multiRenderer.setXTitle("Timestamp");
multiRenderer.setYTitle("Device State");
multiRenderer.setZoomButtonsVisible(true);
for(int i=0; i<3;i++){
multiRenderer.addYTextLabel(i, m[i]);
}
for(int i=0;i<time.length;i++)
{
DecimalFormat myFormatter = new DecimalFormat("0.000000");
time1[i] = myFormatter.format(time[i]);
}
for(int i=0; i< x.length;i++){
multiRenderer.addXTextLabel(i, time1[i]);
}
multiRenderer.addSeriesRenderer(stateRenderer);
final GraphicalView grfv = ChartFactory.getBarChartView(getBaseContext(), dataset, multiRenderer, BarChart.Type.DEFAULT);
return grfv;
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
final GraphicalView gv=createIntent();
RelativeLayout rl=(RelativeLayout)findViewById(R.id.graph);
rl.addView(gv);
rl.measure(MeasureSpec.makeMeasureSpec(800, MeasureSpec.EXACTLY), MeasureSpec.makeMeasureSpec(800, MeasureSpec.EXACTLY));
rl.layout(0, 0, rl.getMeasuredWidth(), rl.getMeasuredHeight());
Bitmap bm=Bitmap.createBitmap(rl.getWidth(), rl.getHeight(),Bitmap.Config.ARGB_8888);
Canvas cn=new Canvas(bm);
rl.draw(cn);
String root = Environment.getExternalStorageDirectory().toString();
File myDir = new File(root + "/_images");
myDir.mkdirs();
Random generator = new Random();
int n = 10000;
n = generator.nextInt(n);
String fname = "Image-" + n + ".jpg";
File file = new File(myDir, fname);
if (file.exists())
file.delete();
try {
FileOutputStream out = new FileOutputStream(file);
bm.compress(Bitmap.CompressFormat.JPEG, 30, out);
out.flush();
out.close();
} catch (Exception e) {
e.printStackTrace();
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.activity_main, menu);
return true;
}
}