android - Android - 在三星设备上使用 USSD API 运行 USSD *#0011#
问题描述
最近我和我的家人搬到了新房子,我们的电话服务有点问题。随着所有的隔离,我有一个备用的,大声笑,我开始开发安卓应用程序。我阅读了有关如何检查信号强度的信息(我们都有三星设备),我遇到了 USSD 代码 *#0011#。经过一天的研究,我找到了 USSD API 并开始编写一个应用程序,该应用程序最终将显示手机的信号强度(到我的手机)。当我发送 USSD 代码时,回调总是失败,调用 onReceiveUssdResponseFailed()。有什么帮助吗?
public class MainActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
requestPermissions(new String[]{Manifest.permission.CALL_PHONE}, 0);
TelephonyManager telephonyManager = (TelephonyManager) getSystemService(Context.TELEPHONY_SERVICE);
Handler handler = new Handler();
TelephonyManager.UssdResponseCallback responseCallback = new TelephonyManager.UssdResponseCallback() {
@Override
public void onReceiveUssdResponse(TelephonyManager telephonyManager, String request, CharSequence response) {
super.onReceiveUssdResponse(telephonyManager, request, response);
Toast.makeText(MainActivity.this, "Success", Toast.LENGTH_LONG).show();
}
@Override
public void onReceiveUssdResponseFailed(TelephonyManager telephonyManager, String request, int failureCode) {
super.onReceiveUssdResponseFailed(telephonyManager, request, failureCode);
Toast.makeText(MainActivity.this, "Failed " + request, Toast.LENGTH_LONG).show();
}
};
try {
if (ActivityCompat.checkSelfPermission(this, Manifest.permission.CALL_PHONE) != PackageManager.PERMISSION_GRANTED) {
// TODO: Consider calling
// ActivityCompat#requestPermissions
// here to request the missing permissions, and then overriding
// public void onRequestPermissionsResult(int requestCode, String[] permissions,
// int[] grantResults)
// to handle the case where the user grants the permission. See the documentation
// for ActivityCompat#requestPermissions for more details.
return;
}
telephonyManager.sendUssdRequest("*#0011#", responseCallback, handler);
} catch (NullPointerException e){
e.printStackTrace();
}
}
}
解决方案
开发安卓应用。我阅读了有关如何检查信号强度的信息(我们都有三星设备),我遇到了 USSD 代码 *#0011#。经过一天的研究,我找到了 USSD API 并开始编写一个应用程序,该应用程序最终将显示手机的信号强度(到我的手机)。当我发送 USSD 代码时,回调总是失败,调用 onReceiveUssdResponseFailed()。有什么帮助吗?
public class MainActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
requestPermissions(new String[]{Manifest.permission.CALL_PHONE}, 0);
TelephonyManager telephonyManager = (TelephonyManager) getSystemService(Context.TELEPHONY_SERVICE);
Handler handler = new Handler();
TelephonyManager.UssdResponseCallback responseCallback = new TelephonyManager.UssdResponseCallback() {
@Override
public void onReceiveUssdResponse(TelephonyManager telephonyManager, String request, CharSequence response) {
super.onReceiveUssdResponse(telephonyManager, request, response);
Toast.makeText(MainActivity.this, "Success", Toast.LENGTH_LONG).show();
}
@Override
public void onReceiveUssdResponseFailed(TelephonyManager telephonyManager, String request, int failureCode) {
super.onReceiveUssdResponseFailed(telephonyManager, request, failureCode);
Toast.makeText(MainActivity.this, "Failed " + request, Toast.LENGTH_LONG).show();
}
};
try {
if (ActivityCompat.checkSelfPermission(this, Manifest.permission.CALL_PHONE) != PackageManager.PERMISSION_GRANTED) {
// TODO: Consider calling
// ActivityCompat#requestPermissions
// here to request the missing permissions, and then overriding
// public void onRequestPermissionsResult(int requestCode, String[] permissions,
// int[] grantResults)
// to handle the case where the user grants the permission. See the documentation
// for ActivityCompat#requestPermissions for more details.
return;
}
telephonyManager.sendUssdRequest("*#0011#", responseCallback, handler);
} catch (NullPointerException e){
e.printStackTrace();
}
}
}
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