So I am trying to create an android app to show some simple battery information. And now I want to take that info and plot a graph inside the app. I have the following codes:
public class MainActivity extends ActionBarActivity {
private TextView level,voltage, status1,temp,health1,tech,sour,amp;
Thread myThread;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
level=(TextView)findViewById(R.id.level);
voltage=(TextView)findViewById(R.id.volt);
status1=(TextView)findViewById(R.id.stat);
temp=(TextView)findViewById(R.id.temp);
health1=(TextView)findViewById(R.id.healt);
tech=(TextView)findViewById(R.id.tech);
sour=(TextView)findViewById(R.id.source);
Button b = (Button) findViewById(R.id.ex);
Button g = (Button) findViewById(R.id.graphButton);
amp=(TextView)findViewById(R.id.current);
b.setOnClickListener(new View.OnClickListener(){
public void onClick(View v) {
// TODO Auto-generated method stub
finish();
}
});
g.setOnClickListener(new View.OnClickListener(){
public void onClick(View v) {
//how can i jump to DynamicGraphActivity
}
});
this.registerReceiver(this.myBatteryReceiver,
new IntentFilter(Intent.ACTION_BATTERY_CHANGED));
}
private BroadcastReceiver myBatteryReceiver
= new BroadcastReceiver(){
@SuppressLint("InlinedApi")
@Override
public void onReceive(Context arg0, Intent arg1) {
// TODO Auto-generated method stub
if (arg1.getAction().equals(Intent.ACTION_BATTERY_CHANGED)){
int lv = arg1.getIntExtra("level", 0);
level.setText("Level: "
+ String.valueOf(lv) + "%");
voltage.setText("Voltage: "
+ String.valueOf((float)arg1.getIntExtra("voltage", 0)/1000) + "V");
temp.setText("Temperature: "
+ String.valueOf((float)arg1.getIntExtra("temperature", 0)/10) + "c");
tech.setText("Technology: " + arg1.getStringExtra("technology"));
int status = arg1.getIntExtra("status", BatteryManager.BATTERY_STATUS_UNKNOWN);
String strStatus;
if (status == BatteryManager.BATTERY_STATUS_CHARGING){
strStatus = "Charging";
} else if (status == BatteryManager.BATTERY_STATUS_DISCHARGING){
strStatus = "Dis-charging";
} else if (status == BatteryManager.BATTERY_STATUS_NOT_CHARGING){
strStatus = "Not charging";
} else if (status == BatteryManager.BATTERY_STATUS_FULL){
strStatus = "Full";
} else {
strStatus = "Unknown";
}
status1.setText("Status: " + strStatus);
//int source=arg1.getIntExtra("source", BatteryManager.BATTERY_STATUS_UNKNOWN);
if(Build.VERSION.SDK_INT >= 21){
BatteryManager battery = (BatteryManager)getSystemService(Context.BATTERY_SERVICE);
int current=battery.getIntProperty(BatteryManager.BATTERY_PROPERTY_CURRENT_NOW);
int currentAvg=battery.getIntProperty(BatteryManager.BATTERY_PROPERTY_CURRENT_AVERAGE);
int energy=battery.getIntProperty(BatteryManager.BATTERY_PROPERTY_ENERGY_COUNTER);
int capacity=battery.getIntProperty(BatteryManager.BATTERY_PROPERTY_CHARGE_COUNTER);
int bCapacity=battery.getIntProperty(BatteryManager.BATTERY_PROPERTY_CAPACITY);
String string1 = "Current: "+ current*1000+" uA"+"\n";
string1+="Average Current: "+currentAvg+" uA"+"\n";
string1+="Remaining energy: "+energy+" nWh"+"\n";
string1+="Capacity: "+capacity+" uAh"+"\n\n";
amp.setText(string1);
}
int health = arg1.getIntExtra("health", BatteryManager.BATTERY_HEALTH_UNKNOWN);
String strHealth;
if (health == BatteryManager.BATTERY_HEALTH_GOOD){
strHealth = "Good";
} else if (health == BatteryManager.BATTERY_HEALTH_OVERHEAT){
strHealth = "Over Heat";
} else if (health == BatteryManager.BATTERY_HEALTH_DEAD){
strHealth = "Dead";
} else if (health == BatteryManager.BATTERY_HEALTH_OVER_VOLTAGE){
strHealth = "Over Voltage";
} else if (health == BatteryManager.BATTERY_HEALTH_UNSPECIFIED_FAILURE){
strHealth = "Unspecified Failure";
} else{
strHealth = "Unknown";
}
health1.setText("Health: " + strHealth);
}
}
};
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
}
2nd Activity or DynamicGraphActivity:
public class DynamicGraphActivity extends Activity {
private static GraphicalView view;
private LineGraph line = new LineGraph();
private static Thread thread;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
thread = new Thread() {
public void run()
{
for (int i = 0; i < 15; i++)
{
try {
Thread.sleep(2000);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
Point p = MockData.getDataFromReceiver(i); // We got new data!
line.addNewPoints(p); // Add it to our graph
view.repaint();
}
}
};
thread.start();
}
@Override
protected void onStart() {
super.onStart();
view = line.getView(this);
setContentView(view);
}
}
import org.achartengine.ChartFactory;
import org.achartengine.GraphicalView;
import org.achartengine.chart.PointStyle;
import org.achartengine.model.TimeSeries;
import org.achartengine.model.XYMultipleSeriesDataset;
import org.achartengine.renderer.XYMultipleSeriesRenderer;
import org.achartengine.renderer.XYSeriesRenderer;
import android.content.Context;
import android.graphics.Color;
public class LineGraph {
private GraphicalView view;
private TimeSeries dataset = new TimeSeries("Rain Fall");
private XYMultipleSeriesDataset mDataset = new XYMultipleSeriesDataset();
private XYSeriesRenderer renderer = new XYSeriesRenderer(); // This will be used to customize line 1
private XYMultipleSeriesRenderer mRenderer = new XYMultipleSeriesRenderer(); // Holds a collection of XYSeriesRenderer and customizes the graph
public LineGraph()
{
// Add single dataset to multiple dataset
mDataset.addSeries(dataset);
// Customization time for line 1!
renderer.setColor(Color.WHITE);
renderer.setPointStyle(PointStyle.SQUARE);
renderer.setFillPoints(true);
// Enable Zoom
mRenderer.setZoomButtonsVisible(true);
mRenderer.setXTitle("Day #");
mRenderer.setYTitle("CM in Rainfall");
// Add single renderer to multiple renderer
mRenderer.addSeriesRenderer(renderer);
}
public GraphicalView getView(Context context)
{
view = ChartFactory.getLineChartView(context, mDataset, mRenderer);
return view;
}
public void addNewPoints(Point p)
{
dataset.add(p.getX(), p.getY());
}
}
import java.util.Random;
public class MockData {
// x is the day number, 0, 1, 2, 3
public static Point getDataFromReceiver(int x)
{
return new Point(x, generateRandomData());
}
private static int generateRandomData()
{
Random random = new Random();
return random.nextInt(40);
}
}
public class Point {
private int x;
private int y;
public Point( int x, int y)
{
this.x = x;
this.y = y;
}
public int getX() {
return x;
}
public int getY() {
return y;
}
}
Now inside the button g, I want to call DynamicGraphActivity class so that it calls the class and plots a graph using some random values. but its not working. When i click on the button, it doesnt do anything. How can I fix this?
And my another question is, how can I plot the battery info such as voltage, charge or discharge over time using these codes/ Any help would be greatly appreciated. Thank you
