重要提示:

如果你使用Intent。ACTION_CALL必须增加CALL_PHONE权限。

如果你不想让你的应用在没有SIM卡或没有GSM的平板电脑上显示谷歌播放，这是可以的。

在活动中:

            Intent callIntent = new Intent(Intent.ACTION_CALL);
            callIntent.setData(Uri.parse("tel:" + Constants.CALL_CENTER_NUMBER));
            startActivity(callIntent);

清单:

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

因此，如果它不是应用程序的关键功能，尽量避免添加CALL_PHONE权限。

其他解决方案:

是在屏幕上显示手机应用程序，用户只需要点击呼叫按钮:

            Intent dialIntent = new Intent(Intent.ACTION_DIAL);
            dialIntent.setData(Uri.parse("tel:" + Constants.CALL_CENTER_NUMBER));
            startActivity(dialIntent);

这样做不需要许可。

你也可以用这个:

String uri = "tel:" + posted_by.replaceAll("[^0-9|\\+]", "");

AndroidManifest.xml中的权限

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

完整的代码:

private void onCallBtnClick(){
    if (Build.VERSION.SDK_INT < 23) {
        phoneCall();
    }else {

        if (ActivityCompat.checkSelfPermission(mActivity,
                Manifest.permission.CALL_PHONE) == PackageManager.PERMISSION_GRANTED) {

            phoneCall();
        }else {
            final String[] PERMISSIONS_STORAGE = {Manifest.permission.CALL_PHONE};
            //Asking request Permissions
            ActivityCompat.requestPermissions(mActivity, PERMISSIONS_STORAGE, 9);
        }
    }
}

@Override
public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) {
    boolean permissionGranted = false;
    switch(requestCode){
        case 9:
            permissionGranted = grantResults[0]== PackageManager.PERMISSION_GRANTED;
            break;
    }
    if(permissionGranted){
        phoneCall();
    }else {
        Toast.makeText(mActivity, "You don't assign permission.", Toast.LENGTH_SHORT).show();
    }
}

private void phoneCall(){
    if (ActivityCompat.checkSelfPermission(mActivity,
            Manifest.permission.CALL_PHONE) == PackageManager.PERMISSION_GRANTED) {
        Intent callIntent = new Intent(Intent.ACTION_CALL);
        callIntent.setData(Uri.parse("tel:12345678900"));
        mActivity.startActivity(callIntent);
    }else{
        Toast.makeText(mActivity, "You don't assign permission.", Toast.LENGTH_SHORT).show();
    }
}

11-25 14:47:01.681: ERROR/AndroidRuntime(302): blah blah...requires android.permission.CALL_PHONE

^答案在于异常输出“需要android.permission”。CALL_PHONE”:)

 if(ContextCompat.checkSelfPermission(
        mContext,android.Manifest.permission.CALL_PHONE) != 
              PackageManager.PERMISSION_GRANTED) {
                    ActivityCompat.requestPermissions((Activity) mContext, new 
                  String[]{android.Manifest.permission.CALL_PHONE}, 0);
                } else {
                    startActivity(new Intent(Intent.ACTION_CALL, Uri.parse("tel:" + "Your Number")));
                }

在你的意图中使用ACTION_DIAL动作，这样你就不需要任何权限了。您需要ACTION_CALL权限的原因是在用户没有任何操作的情况下拨打电话。

Intent intent = new Intent(Intent.ACTION_DIAL);
intent.setData(Uri.parse("tel:0987654321"));
startActivity(intent);