Intent 拨号

权限：<uses-permission android:name="android.permission.CALL_PHONE"

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public void gotoCall(View v)
{
    EditText et = findViewById(R.id.phone);
    String num = et.getText().toString();
    if (num.equals(""))
        Toast.makeText(this, "no num", Toast.LENGTH_SHORT).show();
    else
        startCall(num);
}

public void startCall(String num)
{
    Intent intent = new Intent();
    intent.setAction(Intent.ACTION_CALL);
    intent.setData(Uri.parse("tel:" + num));
    startActivity(intent);
}