MainActivity.java 文件源码

/**
 * Uses an implicit intent to make the phone call.
 * Before calling, checks to see if permission is granted.
 *
 * @param view View that was clicked.
 */
public void callNumber(View view) {
    String normalizedPhoneNumber;
    // Find the editText_main view and assign it to editText.
    EditText editText = (EditText) findViewById(R.id.editText_main);
    if (Build.VERSION.SDK_INT < Build.VERSION_CODES.LOLLIPOP) {
        Log.d(TAG, "Running version earlier than Lollipop. Can't normalize number.");
        normalizedPhoneNumber = editText.getText().toString();
    } else {
        normalizedPhoneNumber =
                PhoneNumberUtils.normalizeNumber(editText.getText().toString());
    }
    // Use format with "tel:" and phone number to create phoneNumber.
    String phoneNumber = String.format("tel: %s", normalizedPhoneNumber);
    // Log the concatenated phone number for dialing.
    Log.d(TAG, getString(R.string.dial_number) + phoneNumber);
    Toast.makeText(this, getString(R.string.dial_number) + phoneNumber,
            Toast.LENGTH_LONG).show();
    // Create the intent.
    Intent callIntent = new Intent(Intent.ACTION_CALL);
    // Set the data for the intent as the phone number.
    callIntent.setData(Uri.parse(phoneNumber));
    // If package resolves to an app, check for phone permission,
    // and send intent.
    if (callIntent.resolveActivity(getPackageManager()) != null) {
        checkForPhonePermission();
        startActivity(callIntent);
    } else {
        Log.e(TAG, "Can't resolve app for ACTION_CALL Intent.");
    }
}