How to Make a Call directly in Android

问题:

I know it was very simple to do it but I come across a very strange issue. I have to call Police in danger Situation by just tapping a button. So I have used following code to call.

Intent callIntent = new Intent(Intent.ACTION_CALL);
            callIntent.setData(Uri.parse("tel:100"));
            callIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
            ctx.startActivity(callIntent);

Added CALL_PHONE permission in AndroidManifest.xml. The Issue is that it is opening the 100 on Dial Pad but not making call directly. I want that to happen immediately when user clicks on the button.

When I tried to to put +91 before 100 it is calling the number automatically but why plus is required for such numbers. So Someone help me how to solve this issue

回答1:

From the documentation of ACTION_CALL:

Note: there will be restrictions on which applications can initiate a call; most applications should use the ACTION_DIAL.

Note: this Intent cannot be used to call emergency numbers. Applications can dial emergency numbers using ACTION_DIAL, however.

So it seems this behavior is on purpose.

回答2:

There could be a problem that the android system doesnt recognize 100 as a valid phone number, instead if you put the country code before it then it works fine. TO solve such issue take a look at this library libnhonenumber. You could use it something like this

public static ArrayList<String> extractPhoneNumber(String content) {

    ArrayList<String> numbers = new ArrayList<String>(0);

    PhoneNumberUtil instance = PhoneNumberUtil.getInstance();

    //Change IT with your contry code
    Iterable<PhoneNumberMatch> matches = instance.findNumbers(content, "IT");

    Iterator<PhoneNumberMatch> iterator = matches.iterator();

    while (iterator.hasNext()) {
        numbers.add(instance.format(iterator.next().number(), PhoneNumberFormat.INTERNATIONAL));
    }

    return numbers;
}

回答3:

private void phoneCall()
{
 String phoneCallUri = "tel:91";
 Intent phoneCallIntent = new Intent(Intent.ACTION_CALL);
 phoneCallIntent.setData(Uri.parse(phoneCallUri));
 startActivity(phoneCallIntent);
}

回答4:

Best way to directly call without user intervention..

String uri = "tel:" + num.trim();
Intent intent = new Intent(Intent.ACTION_CALL);
intent.setData(Uri.parse(uri));
startActivity(intent);

回答5:

There are two intents to call/start calling: ACTION_CALL and ACTION_DIAL. ACTION_DIAL will only open the dialer with the number filled in, but allows the user to actually call or reject the call. ACTION_CALL will immediately call the number and requires an extra permission. So make sure you have the permission

回答6:

A Long time passed. But may help someone else. If you want to call directly, you should use requestPermissions method.

1. Add this line to your manifest file:

<uses-permission android:name="android.permission.CALL_PHONE" />

2. Define a class variable in the activity class:

private static Intent phoneCallIntent; //If use don't need a member variable is good to use a static variable for memory performance.

3. Add these lines to the onCreate method of the activity:

final String permissionToCall = Manifest.permission.CALL_PHONE;
//Assume that you have a phone icon.
(findViewById(R.id.menuBarPhone)).setOnClickListener(new OnClickListener(){
    public void onClick(View view) {
        phoneCallIntent = new Intent(Intent.ACTION_CALL);
        phoneCallIntent.setData(Uri.parse(getString(R.string.callNumber))); //Uri.parse("tel:your number")
        if (ActivityCompat.checkSelfPermission(MainFrame.this, permissionToCall) != PackageManager.PERMISSION_GRANTED) {
            ActivityCompat.requestPermissions(MainFrame.this, new String[]{permissionToCall}, 1);
            return;
        }
        startActivity(phoneCallIntent);
    }
});

4. And for making a call immediately after clicking on Allow button, override onRequestPermissionsResult method:

@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults){
    super.onRequestPermissionsResult(requestCode, permissions, grantResults);
    if(requestCode == 1){
        final int permissionsLength = permissions.length;
        for (int i = 0; i < permissionsLength; i++) {
            if(grantResults[i] == PackageManager.PERMISSION_GRANTED){
                startActivity(phoneCallIntent);
            }
        }
    }

When a user give the permission, next time there will be no dialogue box and call will be make directly.