Question

我试图提出申请。我有一些问题。我想在＆＃34; DeviceActivity.java＆＃34;中创建设备信息。文件并在任何页面上使用它。

我在MainActivity.java上创建的代码块：

public class MainActivity extends AppCompatActivity {

String email;
int MY_PERMISSIONS_EMAIL = 8889;

String imei;
int MY_PERMISSIONS_IMEI = 8889;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    ////////////////////// E-Posta Sorgulama //////////////////////
    if (ActivityCompat.checkSelfPermission(this, Manifest.permission.GET_ACCOUNTS) != PackageManager.PERMISSION_GRANTED) {
        ActivityCompat.requestPermissions(this,
                new String[]{Manifest.permission.GET_ACCOUNTS},
                MY_PERMISSIONS_EMAIL);
    } else {
        Pattern emailPattern = Patterns.EMAIL_ADDRESS; // API level 8+
        Account[] accounts = AccountManager.get(MainActivity.this).getAccounts();
        for (Account account : accounts) {
            if (emailPattern.matcher(account.name).matches()) {
                email = account.name;
            }
        }

    }
    TextView epota = (TextView) findViewById(R.id.email);
    epota.setText("E-posta: " + email);
    ////////////////////// E-Posta Sorgulama Son //////////////////////

    ////////////////////// Cihaz Modeli Sorgulama //////////////////////
    String CihazModel = Build.MODEL;
    TextView cihazmodel = (TextView) findViewById(R.id.cihaz_model);
    cihazmodel.setText("Cihaz Modeli: " + CihazModel);
    ////////////////////// Cihaz Modeli Sorgulama Son //////////////////////

    ////////////////////// Cihaz İsmi Sorgulama //////////////////////
    String CihazIsim = Build.MANUFACTURER;
    TextView cihazisim = (TextView) findViewById(R.id.cihaz_isim);
    cihazisim.setText("Cihaz İsmi: " + CihazIsim.toUpperCase()+ " " + CihazModel);
    ////////////////////// Cihaz İsmi Sorgulama Son //////////////////////


    ////////////////////// Bellek Sorgulama //////////////////////
    RandomAccessFile reader = null;
    String load = null;
    DecimalFormat twoDecimalForm = new DecimalFormat("#.##");
    double totRam = 0;
    String lastValue = "";
    try {
        reader = new RandomAccessFile("/proc/meminfo", "r");
        load = reader.readLine();

        // Get the Number value from the string
        Pattern p = Pattern.compile("(\\d+)");
        Matcher m = p.matcher(load);
        String value = "";
        while (m.find()) {
            value = m.group(1);
            // System.out.println("Ram : " + value);
        }
        reader.close();

        totRam = Double.parseDouble(value);
        // totRam = totRam / 1024;

        double mb = totRam / 1024.0;
        double gb = totRam / 1048576.0;
        double tb = totRam / 1073741824.0;

        if (tb > 1) {
            lastValue = twoDecimalForm.format(tb).concat(" TB");
        } else if (gb > 1) {
            lastValue = twoDecimalForm.format(gb).concat(" GB");
        } else if (mb > 1) {
            lastValue = twoDecimalForm.format(mb).concat(" MB");
        } else {
            lastValue = twoDecimalForm.format(totRam).concat(" KB");
        }


    } catch (IOException ex) {
        ex.printStackTrace();
    } finally {
        // Streams.close(reader);
    }


    String CihazBellek = lastValue;
    TextView cihazbellek = (TextView) findViewById(R.id.cihaz_bellek);
    cihazbellek.setText("Cihaz Bellek: " + CihazBellek);
    ////////////////////// Bellek Sorgulama Son //////////////////////

    ////////////////////// İşletim Sistemi //////////////////////
    String CihazOs = "Android";
    TextView cihazos = (TextView) findViewById(R.id.cihaz_os);
    cihazos.setText("Cihaz OS: " + CihazOs);
    ////////////////////// İşletim Sistemi Son //////////////////////

    ////////////////////// Cihaz ID Sorgulama //////////////////////
    String CihazId = Settings.Secure.getString(getContentResolver(), Settings.Secure.ANDROID_ID);
    TextView cihazid = (TextView) findViewById(R.id.cihaz_id);
    cihazid.setText("Cihaz ID: " + CihazId);
    ////////////////////// Cihaz ID Sorgulama Son //////////////////////

    ////////////////////// Cihaz OS Versiyonu Sorgulama //////////////////////
    Integer CihazApi = Build.VERSION.SDK_INT;
    TextView cihazapi = (TextView) findViewById(R.id.cihaz_api);
    cihazapi.setText("Cihaz Api: " + CihazApi.toString());
    ////////////////////// Cihaz OS Versiyonu Sorgulama Son //////////////////////

    ////////////////////// Cihaz Zaman Dilimi Sorgulama //////////////////////
    String TimeZone = java.util.TimeZone.getDefault().getID();
    TextView timezone = (TextView) findViewById(R.id.timezone);
    timezone.setText("Timezone: " + TimeZone);
    ////////////////////// Cihaz Zaman Dilimi Sorgulama Son //////////////////////

    ////////////////////// Cihaz IMEI Sorgulama //////////////////////
    if (ActivityCompat.checkSelfPermission(this, Manifest.permission.READ_PHONE_STATE) != PackageManager.PERMISSION_GRANTED) {
        ActivityCompat.requestPermissions(this,
                new String[]{Manifest.permission.READ_PHONE_STATE},
                MY_PERMISSIONS_IMEI);
    } else {
        TelephonyManager tManager = (TelephonyManager) getBaseContext()
                .getSystemService(Context.TELEPHONY_SERVICE);
        imei = tManager.getDeviceId();

    }

    TextView cihazimei = (TextView) findViewById(R.id.imei);
    cihazimei.setText("Cihaz Imei: " + imei);
    ////////////////////// Cihaz IMEI Sorgulama Son //////////////////////
}
}

我想将此页面上的代码改编为＆＃34; DeviceActivity.java＆＃34;页面并在其他页面上使用它。

Answer 1

如果我理解正确，只需创建一个新的公共java类并在那里添加这些代码。然后从所需页面上的类调用该方法。

public class DeviceActivity { 
public DeviceActivity(Context context) {this.context = context;} 
public YourMethod(int someVariable, string someOtherVariable) { 
// Your code here. 
} 
}

然后按如下方式调用：

DeviceActivity deviceActivity = new DeviceActivity(YourActivity.this);
deviceActivity.YourMethod(someVariable, someOtherVariable);

希望这会有所帮助：）

修改

根据我的理解，请尝试以下操作。我不确定你遇到了什么错误，但我似乎无法清楚地理解这个问题。请遵循以下代码。

public class MainActivity extends AppCompatActivity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); DatabaseActivity db = new DatabaseActivity(); db.SaveInformationToDatabase(variable, otherVariable); //Add your own variables. } } public class DatabaseActivity { public void SaveInformationToDatabase(int variable, string otherVariable) { //Add your code to save details to database. } public Request retrieveDetailsFromDatabase() { //Add your code to retrieve the details from database as Json } } public class DeviceActivity extends AppCompatActivity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); DatabaseActivity db = new DatabaseActivity(); Request request = db.retrieveDetailsFromDatabase(); //Use request to retrieve Json and set details retrieved. }

Android创建和使用方法

1 个答案: