我正在编写一个程序,用一定量的迭代计算pi。我希望能够计算出这需要多长时间以及使用多少功率。我有这个应用程序的另一个版本完美的工作,但使用相同的代码,这个版本不会。 大多数代码工作正常但是powerRunnable代码在调用时没有执行。 有什么想法吗?
public class MainActivity extends AppCompatActivity {
//GUI
TextView piResultTextView, timeResultTextView,
powerResultTextView, voltageTextView, averageCurrentTextView;
EditText piEditText;
Button calculateButton, stopButton;
TextView countView;
//GLOBAL VARIABLES
Results results;
Handler powerHandler = new Handler();
Runnable powerRunnable = new Runnable() {
@Override
public void run() {
Toast.makeText(getApplicationContext(), "here", Toast.LENGTH_SHORT).show();
long millis = System.currentTimeMillis() - results.initialTime;
timeResultTextView.setText(getString(R.string.display_time, millis));
double current = getCurrent();
results.totalCurrent += current;
results.count++;
double power = current * results.voltage;
results.powerConsumption += power;
countView.setText(String.valueOf(results.count));
powerHandler.postDelayed(this, 1);
}
};
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
piEditText = findViewById(R.id.PiEditText);
calculateButton = findViewById(R.id.CalculateButton);
calculateButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
if (!empty()) {
results = new Results(getVoltage());
results.initialTime = System.currentTimeMillis();
powerHandler.postDelayed(powerRunnable, 0);
calculatePi(piEditText.getText().toString());
finalizeResults();
displayResults();
}
}
});
stopButton = findViewById(R.id.StopButton);
stopButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
piResultTextView.setText("");
timeResultTextView.setText("");
powerResultTextView.setText("");
voltageTextView.setText("");
averageCurrentTextView.setText("");
powerHandler.removeCallbacks(powerRunnable);
}
});
piResultTextView = findViewById(R.id.PiResultTextView);
timeResultTextView = findViewById(R.id.TimeResultTextView);
powerResultTextView = findViewById(R.id.PowerResultTextView);
voltageTextView = findViewById(R.id.VoltageTextView);
averageCurrentTextView = findViewById(R.id.AverageCurrentTextView);
countView = findViewById(R.id.CountView);
}
@Override
public void onPause() {
super.onPause();
powerHandler.removeCallbacks(powerRunnable);
}
public void finalizeResults() {
results.endTime = System.currentTimeMillis();
powerHandler.removeCallbacks(powerRunnable);
results.powerConsumption *= 1000;
}
public void displayResults() {
piResultTextView.setText(results.pi);
timeResultTextView.setText(getString(R.string.display_time, results.getTime()));
powerResultTextView.setText(getString(R.string.display_power, results.powerConsumption));
voltageTextView.setText(getString(R.string.display_voltage, results.getVoltage()));
averageCurrentTextView.setText(getString(R.string.display_current, results.getAverageCurrent()));
}
}
答案 0 :(得分:0)
我尝试在我的应用程序中使用您的部分代码:
Handler powerHandler = new Handler();
Runnable powerRunnable = new Runnable() {
@Override
public void run() {
Toast.makeText(getApplicationContext(), "here", Toast.LENGTH_SHORT).show();
powerHandler.postDelayed(this, 1);
}
};
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_login);
ButterKnife.bind(this);
powerHandler.postDelayed(powerRunnable, 0);
}
它的工作。